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focal length of plane mirror
Asked by | 28 Feb, 2012, 11:38: AM
answered-by-expert Expert Answer
Mathematically, a plane mirror can be considered to be the limit of either a concave or a convex spherical curved mirror as the radius, and therefore the focal length, becomes infinite.A plane mirror is a mirror with a plane reflective surface. For light rays striking a plane mirror, the angle of reflection equals the angle of incidence. Thus a collimated beam of light does not spread out after reflection from a plane mirror, except for diffraction effects.
Answered by | 28 Feb, 2012, 11:56: AM

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