A beam of light from a source is incident normally on a

Last updated: 6/14/2023

A beam of light from a source is incident normally on a plane mirror fixed at a distance 2m from the source The beam reflected back as a spot on a scale placed just above the source When the mirror is rotated through a small ang 1 8 the spot of the light is found to move through a distance d on the scale The distance d is A B 0 1831 m 0 1256 m 3 14 m None of these