what is the focal length of plain mirror justify by calculation
Answers
Answer:
Focal Length. The focal length ( f ) is the distance from a lens or mirror to the focal point ( F ). This is the distance from a lens or mirror at which parallel light rays will meet. ... Light rays that are parallel to each other, but not to the optical axis, will meet on the focal plane.
Answer:
Virtual objects produce real images, however. The focal length of a plane mirror is infinity; its optical power is zero.
Explanation:
A plane mirror is a mirror with a flat (planar) reflective surface. For light rays striking a plane mirror, the angle of reflection equals the angle of incidence. The angle of the incidence is the angle between the incident ray and the surface normal (an imaginary line perpendicular to the surface). Therefore, the angle of reflection is the angle between the reflected ray and the normal and a collimated beam of light does not spread out after reflection from a plane mirror, except for diffraction effects.
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