18Aug/100
Looking at myself in a large mirror
Before we get to looking at oneself through a mirror, I thought it would be nice to talk about mirrors just a little bit. A mirror is a polished surface on which to affect the light is reflected by the laws of reflection. The simplest example is the plane mirror or spherical mirror. In it, a beam of parallel light rays can change direction completely as a whole and continue to be a beam of parallel rays, and can produce a virtual image of an object with the same size and shape as the real. However, the image is right, but reversed on the vertical axis. There are also concave mirrors and convex mirrors. When a mirror is concave and the curve is a parabola, if a ray strikes the mirror parallel to the axis is reflected through the focus (which is half the optical center of the field belonging to the mirror), and whether it affects through the focus, is reflected parallel to the main shaft. Although large mirrors are not a necessity, once you have used one daily, you will wonder how you ever managed without one. Big mirrors are very helpful for a lot of tasks such as; putting on makeup, drying/straightening hair, tieing neckties, admiring your many muscles, and so much more.Mirrors and toilet utensils and manual object were widely used in Egyptian civilizations, Greek, Etruscan and Roman. Were produced always brushed metal, usually copper, silver or bronze, this process is called plating. They had a round or oval plate, usually decorated with carvings or mythological reliefs on the back (the Romans lack of prints, but no relief) and carved to grasp handle comfortably, of which many specimens are still preserved in some archaeological museums . During the early Middle Ages, hardly made use of the mirror, until the thirteenth century invented the manufacture of glass and crystal on metal foil (or lead or tin amalgam mirrors are quicksilver) while for this to be constructed of metal only to the eighteenth century. Sejarah Cermet beam of light bouncing off a mirror at an angle equal to the angle it hit the mirror in. This means that if the beam shines onto the mirror at an angle of 30 degrees, so be it back from the point the framework at an angle of 30 degrees, but in the opposite direction. Mirrors appear to reverse the left and right, but they do not in reality. A white surface may not seem like a mirror, although it does not absorb light, it throws it back as diffuse light, to avoid generating an image. The earliest mirrors (apart from water surfaces, see myth Narcissos) consisted of a plate of polished metal, often silver when the intention was to use the mirror in the personal care, but other metals, if you just would create intense back thrown light. Construction and types of modern mirrors consist mostly of a thin layer of aluminum (or other metals) that are placed on a glass. But the silver lining is used, for example. in Pilkington Optimirror ™. They are usually coated on the back so the reflective surface visible through the glass. This makes the mirror durable, but it reduces the image quality of the mirror due to extraneous reflections from the front of the glass plate. How a mirror reflects about. 80% of the light it receives. Mirrors are coated on the front and have a better image quality, easily damaged and destroyed. They reflect 90-95% of the light received. Astronomical mirrors are of the latter type, and the need to identify new surface at intervals to maintain their quality. Some mirrors have both a glass front and behind the reflective layer. This protects against corrosion of the reflective metal layer and to indmuring in wet rooms (bathrooms) is recommended to use these mirrors. These mirrors are called dual mirrors or wet room mirrors. Mirrors in science to science, optical work is often used dielectric mirrors. They consist of a base which may be of glass or other materials and that you have placed one or more layers of dielectric material to form an optical coating. By selecting the type and thickness of the dielectric layer, one can control the range of wavelengths and amount of light that the mirror reflects. The best mirrors of this type may reflect more than 99.999% of the light (in a narrow range of wavelengths), which affects spejlet.Envejsspejle A énvejsspejl throws only approx. half of the light back and let the other half passes through. It is a glass plate, coated with thin metal molecules that they only cover half the surface. It can only be used between a dark and well lit room. From the dark side, it appears as a transparent window and the bright side it looks like a mirror. It can be used when you want to observe criminal suspects, clients (when they fear that they will steal), etc. The same kind of mirror is called a half coated mirror when using it in an optical instrument. It must share a light beam so that half passes straight through while the other half thrown back. Mirrors on cars cars and other motor vehicles are usually more mirrors to help orient themselves in traffic to avoid færdseldulykker. There are various legal requirements to mirror the design depending on the location and vehicle type, some mirrors are flat, while others are convex (wide angle). Mirrors in Art Mirrors have had a major impact on art and literature. They allow the artist to see himself, as his or her surroundings look him or her. Mirrored disturbing ability to double or multiply the world have been studied and described numerous times, but hardly more detailed than in Jorge Luis Borges. Triptych mirrors and full wall mirrors with bar also has implications for women's self-esteem and beauty. towel hooks The mirror, bedroom furniture, beginning with the sixteenth century, for although two centuries earlier lists some historical examples was barely known and their use was rare. In this century, presents with foot elegant and artistic context and occupies a distinguished place in the living room and movable object and reduced size. By the late seventeenth century Venetian factories manage to build large mirrors and has since served as a uniquely decorative items in the rooms, which feature prominently. Modern mirrors consist of a thin layer of silver or aluminum deposited on a glass plate, which protects the metal and makes the glass more durable. It also tells the legend that when the Europeans came to America brought with them the mirror, and such was the impression of Americans who came to change the gold mirror. Interesting Facts about Mirrors In the olden days (4000 B.C) people used obsidian. China was using mirrors made out of Bronze around 2000 B.C.In the 16th century, owning a mirror was a luxury.In a case of espionage, the secret of mercury lined mirrors to create a cheaper and better mirror was discovered by Europe.There is an unproven story involving Archimedes where he gathered a lot of mirrors and used them to burn Roman ships during a conflict. An Italian city called Viganella receives no sunlight for 6 weeks during the winter. In 2006 a computer controlled mirror system was installed to reflect sunlight towards the town. Only large brained social animals are able to understand that a mirror is reflecting it's own image. how to create a make-shift mirror. Ok, so you want to make a mirror? It won't be anything like what you buy at the store but its a neat little trick. First get a piece of silver paper. Attach the paper to something rigid, like cardboard or a flat piece of wood. Next put a piece of glass on top of the paper that is attached to the cardboard. Now you have a mirror! Enjoy. The mirror has an important place in mythology and superstitions of many peoples. The image it reflects is often identified with the soul or spirit of the person: hence such that vampires, bodies without soul, do not reflect on him. When a dying man is about to leave this world, it is common to cover the mirrors, for fear that the soul of the dying from being enclosed in them. The mirror is conceived and, as a window to the world of spirits. The urban legend of Veronica exemplary uses that vision. Conversely, the spirit world tends to be thought of as a specular return of the living. Lewis Carroll masterfully develops the idea of mirror world as input to a reverse in the second part of the adventures of Alice. The mirror is also a frequent subject of inquiry: he is deemed capable of displaying events and objects distant in time or space. In the story of Snow White, the mirror has the ability to speak and answer questions put to him by the stepmother. J. R. R. Tolkien takes up with his famous' mirror of Galadriel "tradition of the mirror capable of displaying the future. In the novel Harry Potter and the Sorcerer's Stone, J. K. Rowling, see the Mirror of Erised (I read in the reverse), which reflects the image of the beholder, but their deepest desires. Also notable is the Mirror of Wisdom (which reflects "all things in heaven and earth except the face of someone who looks into it"), described by Oscar Wilde in the tale The Fisherman and His Soul. A lystråle bounces off a mirror at an angle equal to the angle so it hits the mirror. We say that approach is similar outcome angle. That is, if the beam shines on the mirror at an angle of 30 degrees will also be rolled back from the point at which it hit in the opposite direction, but also in a 30 degree angle. Mirror looks like they switch on the right and left, but they do not actually there in reality. A white surface can not act as a mirror, even if the surface absorbs the light because it throws it back as a diffused light that can not form a reflection. The first mirror was made (if we ignore water surfaces, cf myth Narcissos) consisted of a plate of polished metal, coffee table ottoman often silver if it was for personal use, but other metals if the intention was to create an intense, back-throw light. Structures and types The earliest mirrors consisted of bronze plates which were strongly polished, or bronze plates coated with silver. They were small hand mirror, preferably with a decorated handle, and was reserved for the wealthiest in society. Modern mirror consists of a thin layer of aluminum (or other similar metals), which is placed on a glass. Also sølvbelegging can be used, for example in Pilkington Optimirror ™. They are often coated on the back so that the reflective surface is seen through the glass. It makes the mirror durable, but it degrades the image quality in the mirror because of unauthorized reflections from the front of the glass. These mirrors reflect about 80% of the light it receives. Mirrors are coated on the front and have better picture quality is easily damaged and destroyed. They reflect 90-95% of light they receive. Some mirrors have both a glass front and behind the reflective layer to protect it from corrosion of the reflective layer of metal. In rooms that are wet, such as bathrooms, it is recommended to use such mirrors. These mirrors are called dual mirrors or plumbing mirror. Mirrors in science For scientific optical work is often used dielectric mirror consisting of a base that may be of glass or other materials, which have one or more layers of dielectric material on to form an optical antireflekslag. white rocking chair By selecting the type and thickness of the dielectric layers can control the range of wavelengths and the amount of light that the mirror will reflect. The best mirror of this type can reflect more than 99.999% of the light (in a narrow range of wavelengths) that hits the mirror.One-way Mirror A one-way mirror just throw back almost half of the light that hits the mirror and leave the other half to pass through.One-way mirror is a glass that is coated with a thin layer metallmoloekyler that they only cover half the surface. leather blazer These mirrors can be used between a dark and a well-lit rooms. From the dark side, it looks like a transparent window and the bright side it looks like a mirror. Such mirrors are used, for example, when studying suspicious people without being observed. The same type of mirror is called a half-coated mirror when used in an optical instrument in that it will share a light beam so that half passes through while the other half is rolled back. Mirrors in art Mirror has had a major impact on both art and literature. Mirror allows the artist to see himself the way he or she is being seen by the outside world. Mirror perturb the ability to double or multiply the world have been investigated and described many times, but hardly more detailed than that of Jorge Luis Borges. Mirrors that are folded three times and thus provides three mirror surfaces (full-wall mirror with bar) has also been of importance to women's assertiveness and beauty. When Renaissance art depicting women as the mirror image content itself was described as vanity. Utah Golf Discounts Visual Arts has used the mirror as an aid by reflecting the contents on a wall or a canvas and thus easier to draw it off. Kuperassa mirror image-forming surface of the mirror is a curved surface ("bulb"), the outer surface, so it splits the light. Koverassa mirror mirror surface is a 'pit', so it brings light into focus. If the curved surface is part of the surface of the ball, talking about the ball in the mirror. Concave parabolic mirror with a cross-sectional shape is a parabola, assembles all the axial direction of the light rays so that they all pass through exactly the same point of the mirror focal point. Also a concave spherical mirror, whose inner surface is part of the ball surface, doing so approximately, and the more, the larger the radius of curvature is proportional to the size of the mirror. Distance from the point of burning the surface of the mirror, the mirror focal length, of which the formulas used in the labeling f is half of the sphere radius. Koverassa ball in the mirror object is aggravated, kuperassa again declined. A cylindrical or part-shaped mirror, a kind, for example, amusement parks, ns. Laughter houses, while the target to enlarge or decrease only horizontally or vertically only, while the perpendicular direction will remain the original size. The main curved mirrors are concave and convex spherical mirrors, which are used mirror telescopes, and several other optical devices such as lentils alongside. Car side mirrors, the outer part is often curved so that it appears to the wider region. Such a mirror has been possible to note that the mirror indications that objects such as other cars are closer than what the mirror seems to them to be. Concave spherical mirror Main article: Spherical Mirrors Image formation Image formation koverassa ball in the mirror when the object is of Curvature (C) further away from the mirror. F is the focal point of the mirror. Image formation koverassa ball in the mirror when the object is exactly of Curvature. If the description of the property is situated further away from the concave spherical mirror as its focal point, the mirror forms a real image of the object. In this case, therefore, all from the same object from the left, the mirror reflected rays intersect at the same point, which is located on the same side-view mirror as described esinekin. toddler table If the target is farther Curvature, when minimized image is created between the object and the mirror and is also inverted. Thus, a sufficiently large concave mirror in a human being can see the image upside down. If the object is at the center of the sphere, ie its distance from the mirror is the same as the ball radius, the image consists of an object, and is the size of an object, but upside down. If the object is located in center of the sphere and the focal point for planes, consisting of an enlarged image in the mirror farther than where the property is located, and then it is in fact observed only if the item is translucent, it has holes or if it is located slightly away from the axis of the mirror. If the object is a focal point closer to the mirror, the mirror reflected light rays do not intersect each other, but their imaginary extensions intersect at the other side of the mirror. In this case, a mirror image of the object lie behind the mirror in the same way as tasopeilikin. Formed the image is upright, the magnified image is cast. The level of the mirror case, the image is upright, the object with the same size fake picture. Convex mirror ball Convex mirror to break up the ball hit the same direction from the light rays. Also convex spherical mirror with a radius of curvature is large enough, an image of nearby objects. However, the picture always fallen behind the fake image of a mirror. Description may serve as a mirror flat interface of materials with different refractive index. The mirror, made by man, usually formed of polished metal plate, often made of silver. The current mirrors are often composed of a thin layer of aluminum coated on the back of the glass panels. Because the layer is applied from behind the mirror is more durable, at a price slightly lower image quality. This type of mirror reflects about 95% of incident light. Verso is often painted with a protective layer against corrosion and damage to the metal. In demanding optical applications are used dielectric mirrors where the reflective layer is composed of metal, but the dielectric layer (see below). The effects of a flat mirror as parallel (collimated) beam of light to its propagation direction, while still parallel, resulting in images of a plane mirror is always apparent, upright, same size and symmetrical with the subject according to the plane mirror. By contrast, hollow and convex mirrors as parallel or convergent beam on the Huygens principle rozbíhavý.Na can deduce that the beam is reflected from the mirror at an angle which is equal to the angle of impact. Eg. turns out if the beam on the surface of the mirror at an angle of 30 degrees, then is reflected from the point of impact angle of 30 degrees in the opposite direction atd.Použití Common examples mirror the road Mirrors are used in transport vehicles (cars, motorcycles, etc.) and allow drivers see other vehicles traveling behind them. Larger mirrors are used in road transport also blind and dangerous road junctions. A common example of the use of curved mirrors, the headlights of cars. Here, using parabolic concave (convex) mirror, which changes the parallel light rays to converge (convergent), which intersect at the focus of the mirror. Other mirrors are convex (broke) mirror, which is parallel to the beam as divergent, with an apparent intersection implemented in the mirror. Mirrors are sometimes used as part of the security system so that one camera can be pursued simultaneously more than one direction of gaze. The mirror is used to control parts of the body, which is difficult or impossible to see directly, such as face, neck, mouth, eyes, etc. Also check the physical appearance or various activities such as shaving, hair cutting, etc. The mirror can also serve as a theater and film properties - see the extravagant queen from a fairy tale Snow White and the Seven Dwarfs, which is his magic mirror inquires about who is the world's most beautiful. There are also sunglasses with hindsight, where the left end of the glass left and right ends of the right glass work as mirrors. Mirrors and mirrors are commonly used in many optical devices or optical systems in the large - for example: astronomical telescope (reflector), or cameras. SLR cameras, binoculars or artillery submarine periscopes. Mirrors can also serve as a source of entertainment. They are suitable not only for sending prasátek sun, but also used the mirror mazes and amusement parks to entertain visitors. solid oak dining tableThey are such fun looking at her completely disfigured image in a special distorting mirror, or wandering through the corridors with many large wall mirrors (Petrin mirror maze). Nearby assassination of 27 May 1942 - Reinhard Heydrich, the Reich Protector of Bohemia and Moravia, was seriously wounded when a bomb exploded (Operation Anthropoid). For signaling the arrival of Heydrich convertible Virgin Brezany said Joseph Waltz bomber used a mirror, which gave the sun pig. Concave mirror was said to be used during the Battle of Salamis, the Greeks, with their help successfully set fire to Persian warships. But this is not historically documented, although technically it was then possible. Concave mirrors are used in experimental solar power plants, where sunlight concentrated into one small outbreak of multiple concave mirror serves as a source of cheap thermal energy for heating water vapor that is then used to drive steam turbines (the so-called solar respectively. Solar power - a special type of thermal power plant) one-way mirror one-way mirror, also known as semi-permeable mirror reflects about half of the light and transmits the other half. soothie pacifier It's a pane of glass coated with metal thickness of only a few atoms, which transmits part of the light (both sides). It is used between the dark room and a brightly-lit rooms. Persons on the bright side sees its own reflection - it looks like an ordinary mirror. Persons on the dark side see through a mirror - mirror looks like a transparent window. Can be used in hospitals to control patients, etc. The optics are also called half mirror beam splitter. Its purpose is to split the beam so that the section passed through directly, while the other part is reflected away - it is used for example in interferometry or in cameras (one color digital cameras, analogue Technicolor). Mirror magic in mythology and magic mirror is considered a mysterious object that usually holds the danger for him who looks into it - for example, it was believed that a person who inspects the mirror at midnight, sees his reflection in the devil, and consequently ill or dies. Especially children and pregnant women are dissuaded seen in the mirror. But it is a mirror used as a preservative - was believed that a ghost (a nightmare, vampire, devil), drill chuck which sees in the mirror, your image is startled and fled. Was used not only against supernatural beings, but also storms or storms. Therefore, children in protective cradles of inserting a small mirror. The vampire with this belief was later transofrmovala the notion that a vampire is not reflected in the mirror. The mirror can also be a means to extend the power and knowledge - the magic mirrors designed for divination. Practices associated with such concepts are still alive, and fostered them (temporarily) in the Middle Ages, the Church adopted. Often the person in the mirror was considered a double and a reputation of dealing with the secret world behind the mirror. In death, there was a custom mask all the mirrors in the house that he entered into the souls of the deceased. The concept of mirrors as a mysterious object was updated romantic literature (double fatality) and many fiction writers refer to it as the 20th Century (Jorge Luis Borges, Ladislav Fuks - particularly novel and Duchess kuchařka.V iconography to bind themselves mirror ambivalent meaning: it was an attribute of Wisdom and Pride, vanity, lust and the Immaculate Conception. memory foam slippers A mirror is an object that light (and other types of electromagnetic radiation) reflected the law "angle of incidence = angle of reflection". We distinguish the shape of the reflecting surface: A flat mirror: a mirror with a flat surface. The image is a mirror as large as the original. A concave mirror: a mirror with a mirror surface portion of the inside of a sphere or paraboloid. A shaving or make-up mirror is a good example. The focus of a concave mirror acts to enhance the image, such as a vanity mirror. Beyond the focal point of the image reversal occurs. A carefully polished concave mirror, usually in the form of a paraboloid, is used in a telescope. A convex mirror: a mirror with a convex mirror surface. A convex mirror reduces the image, but increases the visual field. Traffic mirrors and rear view mirrors of lorries use this. A convex mirror is also used as a secondary mirror in certain types of mirror telescopes such as the Cassegrain telescope. A mirror: a mirror with a reflective surface formed erratic, making the image distorted wordt.Voor about convex and concave mirrors as used in telescopes, etc. see Lens (optics). Most chaise sofa levels consist of a glass plate on the back a thin layer of reflective material, usually silver or aluminum. To protect the reflective layer is covered with some laklaagjes. There are also mirrors that consist of a highly polished, flat metal plate. For some applications are also used as a mirror prisms whose sides are silver or where total reflection is used. Examples are the viewer and the prism pentaprism SLRs, like the so-called triple mirror or mirrors in certain types of corner reflector. For flat mirrors, we see due to the way a reflection of the light reflection at equal distances from the mirror as the object size in the mirror and like it. A bright white surface reflects also (almost) all the light striking it back, but while it scatters in all directions. Such a surface is therefore not a mirror. There are also "semi-permeable mirrors. These are used as a beamsplitter in certain optical instruments, such as certain types of interferometers. They are also used as a "confrontation mirrors'" means the person in the mirror himself in the mirror, behind the mirror but who also sees that person. This is used when people are observed to be unobtrusive, such as play therapy for children and interrogations. History Probably the first "mirror" a surface in which a man reflects saw. Real mirrors were in antiquity as an object made of metal. Cast or beaten flat discs of copper, bronze or silver were polished to a mirror to serve. The Bible has been talked about mirrors (Exodus 38:8): They made the bronze basin and bronze frame, and uses the mirrors of the women at the entrance to the Tent were gathered. In ancient Egypt were long before the beginning of our era has bronze mirrors made of polished brass or bronze circular discs. People knew when called glassy mirrors of obsidian with a polished surface. After the invention of glass by the Romans also mirrors made of glass, the glass covered with a layer of metal. One at a dig in Germany found a mirror with gold coating on the back, protected by a coating. After about the 14th century glassblowing was invented, they made mirrors by blowing a big bubble in it and by the blowpipe a mixture of metals like lead, antimony and tin to cast. After cooling, the ball was cut into pieces and thus gained some convex mirrors. Later it was also called mercury mirrors, glass coated with a reflective layer tinamalgaam. Already in the 13th century, such a process is described, but the exact date of first production is not known. In the 16th century, this process generally found implementation. In a 1507 letter from the brothers from the village Danzola del Gallo Murano near Venice, which make the privilege deze vragen over 25 years to make te dergelijke levels, also reclining sofas shows that in Germany and Flanders techniek this has already been applied. Mercury Mirrors were very expensive at that time: the settlement of the estate of the French minister Jean-Baptiste Colbert in 1683, brought a Venetian mirror 115 x 65 cm with silver frame nearly three times as much as a painting by Rubens. For about 400 years mercury levels were the main levels, despite the difficult manufacturing. They put a sheet on a table like tin foil and put them on edge a trellis. Then they poured mercury on the foil with a cloth in the tin rubbed so tinamalgaam was formed. Then they poured a layer of mercury on the foil and put on a clean mercury glass which, with a woolen cloth for protection, was weighted with stones. Then they pulled away to the edge of the slats to drain excess mercury. After a few days the glass to further "dry" on a joan and david shoes scaffolding put. Not only was it a laborious and lengthy process, but also very unhealthy because mercury vapors are very toxic. Therefore, today no longer manufactured mercury levels. In the 19th century you could find a chemical method for concentrations of a layer of silver to provide. Pretty sure the German chemist Justus von Liebig invented, but in English literature the name Drayton said, in French and Italian Petit-Jean Horon. Liebig in 1835, has published an article stating: wenn man mit einer Silbernitratlössung mischt Aldehyde und erhitzt, scheidet sich auf der Wand des Silber ab und es entsteht ein Glases brillianter Mirror. (... If one aldehyde with a silver nitrate solution and melt blends, distinguished silver on the wall of the glass and create a beautiful mirror.) This principle was further developed, and forms the basis for many processes and patents. The manufacture of mirrors are now conducted on a long tape, racquetball bags which the glass plates are placed. The band performs the plates through a cleaning station, where the plates are cleaned with ceriumoxide, chalk and water and then dried. Then the plates are plated with silver nitrate. Because the thin layer of silver is somewhat transparent and very vulnerable on the silver coated copper made. To protect two coatings are then applied. Trivia Las Meninas by Velázquez. The parents of the princess pose for the painter and are visible in the mirror in the background. If two people share the same attitude is reflected in body discussed. In the painting, the mirror is often a function: Jan van Eyck's Arnolfini Portrait of Giovanni and his wife. Velázquez, Las Meninas (The eredames). The mirror comes in many ancient folk tales, myths and fairy tales in front, probably because the mirror by primitive man as a magical object was seen. "Mirror, mirror on the wall, is a parable of the wicked stepmother from Snow White, the mirror is the symbol of the Japanese sun goddess Amaterasu. In Greek mythology, Narcissus fell in love with his own reflection. Breaking a mirror would bring seven years accident (See also: superstition). "The eyes are the mirror of the soul '(Leonardo da Vinci). History of the Mirror is made of the earliest piece of shiny stones like obsidian, a volcanic glass that is formed naturally. Obsidian mirrors found in Anatolia (now Turkey), was about 6000 BC. Polished stone mirrors from central and south America around 2000 BC old. [1] The mirror of polished copper have been made in Mesopotamia in 4000 BC and 3000 BC in ancient Egypt. [2] In China, bronze mirrors made in 2000 BC. Metal-coated glass mirror was invented in Sidon (now Lebanon) in the first century AD, [4] and mirror glass with the back of the gold leaf is mentioned by a Roman author of a book named Pliny in his Natural History, which was composed around the year 77 AD [5 ] The Romans also developed the technique creates a harsh mirror of glass coated with tin blowpipes are melted. Reflective parabolic mirror was first described by physicists from the Arab named Ibn Sahl in the 10th century [7]. Ibn al-Haytham discussed the convex and concave mirrors in a ball and tube geometry, [8] did some experiments with mirrors, and solve problems to find the point on a convex mirror in which rays are coming from one point is reflected to another point. [9] on 11th century, a clear glass mirror produced in Al-Andalus. In the early Renaissance, Europeans refine methods of coating glass with tin-mercury amalgam. Both the date and location of the discovery was still not known, but in the 16th century, Venice, a city famous for its keahilan made of glass, a production center of the mirror using this technique. Mirror glass from that period used to be a very expensive luxury goods. Justus Liebig discovered reflective glass mirror in the year 1835. The process involves the deposition of metallic silver layer on the glass through chemical reduction of silver nitrate. The process of coating glass with a reflective substance (silvering) was adapted for mass-producing the mirror. Today, mirrors are often produced by vacuum deposition of aluminum (or sometimes silver) directly to the substrate kaca.Komposisi Mirror awalmya pieces or sheets made of shiny metal, usually silver or copper metal when the shadow of dipantullan return is to be seen but can also be of other metals when used only to focus the light. Most Modern mirror consists of a thin layer of aluminum coated with glass pieces. This mirror called "gilt back" (back silvered), where the surface bounce seen through the glass pieces. Coating glass mirror with a mirror stand, but reduced the quality of the mirror because of the additional biasan front surface of glass. Such mirror reversed about 80% of the light coming. "The back of" the mirror is often painted completely black to protect the metal from abrasion. Telescopes and other optical equipment using a mirror "front gilt" (front silvered), where the surface of the reflector placed on the surface of the glass, which gives better image quality. Sometimes silver is used, but mostly uses aluminum mirror, which reflects short wave better of silver. Mirror front gilt reflect 90% to 95% of the light comes. Because of rusted metal with oxygen and moisture, gilt mirror front surface repeatedly need to be replaced to maintain quality. Another way is, of course, use a vacuum where to put this mirror . Kepantulan Kepantulan mirror coating depends on the wavelength of light and also on the metal itself, it is used in optical work to produce the cool and hot mirror. Mirror cool produced using a transparent substrate and coating materials that appear to reflect more light and less light propagation infrared. The mirror is the opposite of heat, reflecting more infrared light. The surface of the mirror is sometimes given an additional coating (overcoating) to reduce the surface degradation and improve kepantulan on Parts of the spectrum that will be used. For instance, aluminum mirrors are usually coated with magnesium fluoride. golf iron covers Kepantulan as a function penjang wave depends on the thickness of the coating and how the layers are placed. For scientific optical work, dielectric mirrors are usually used. The mirror is a glass substrate (or sometimes other materials) in one or more dielectric layer was deposited, to form an optical layer. With carefully choose the type and thickness of the dielectric layer, the wavelength coverage and the amount of light reflected from the mirror can be specified. The best mirror of this type is capable of reflecting 99 999% of light (in a narrow wavelength range) and is often used in lasers. Securities in a mirror field, the parallel light rays change direction as a whole, but still remain parallel; formed in a mirror image of the field is a virtual image, which represents the original object. There is also a curved mirror, in which parallel light beam into a convergent beam of light , the rays intersect in the focus (point imagi) mirror. The latter is a convex mirror, where a parallel beam to spread out (divergent), with light scattered from a point of intersection "behind" the mirror. Lack of a spherical concave lens and convex mirror is unable focuses parallel rays to a single point in terms of aberration (aberration) spherical. parabolic reflectors to overcome this problem by making a parallel rays coming (for example, light from a distant star) to focus on a small point; approaching an ideal point. did not match parabolic reflectors for imaging nearby objects because light rays are not parallel. A light is reflected off the mirror at a reflection angle equal to the angle (if the size of a mirror is much larger than the wavelength of light). If the beam of light came to the surface of the mirror at an angle of 30 ° from vertical, and then reflected from the corner came up with an angle of 30 ° from vertical in the opposite direction. This law is mathematically comply with the interference of a plane wave at a flat boundary.