Tue February 28, 2012 By:

focal length of plane mirror

Expert Reply
Tue February 28, 2012
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.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.
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