![]() Natural mirrors have existed since prehistoric times, such as the surface of water, but people have been manufacturing mirrors out of a variety of materials for thousands of years, like stone, metals, and glass. This allows the viewer to see themselves or objects behind them, or even objects that are at an angle from them but out of their field of view, such as around a corner. Mirrors reverse the direction of the image in an equal yet opposite angle from which the light shines upon it. Light that bounces off a mirror will show an image of whatever is in front of it, when focused through the lens of the eye or a camera. Sound waves are much longer than light waves, thus the object produces diffuse reflections in the visual spectrum.Ī mirror, also known as a looking glass, is an object that reflects an image. The mirror magnified the sound of approaching enemy Zeppelins for a microphone placed at the focal point. 4.5-metre (15 ft)-tall acoustic mirror near Kilnsea Grange, East Yorkshire, UK, from World War I. ![]() The angle of the incident light (represented by both the light in the mirror and the shadow behind it) exactly matches the angle of reflection (the reflected light shining on the table). For other uses, see Looking Glass.Ī mirror reflecting the image of a vase A first-surface mirror coated with aluminium and enhanced with dielectric coatings.
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