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Parabolic Mirrors

Mirrors are the oldest and most widely used optical instruments. The plane mirror is the simplest image-forming device. Plane mirrors are found in every home. Spherical or parabolic mirrors are often used in optical instruments instead of lenses . . . . A plane or flat mirror produces a virtual image since the light rays do not come directly from the image. Rays from an object are redirected by the mirror so that they appear to come from an image located as far behind the mirror as the object is in front of the mirror. Object and image are the same size, but the image is reversed from left to right. [p. 58]

[Light and Color, by Clarence Rainwater, Prof. of Physics, San Francisco State College, Original Project Editor Herbert S. Zim, Golden Press, NY, Western Publishing Company, Inc., 1971.]

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