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

Last updated: 5/28/2023

A beam of light from a source L is incident normally on a plane mirror fixed at a certain distance x from the source The beam is reflected back as a spot on a scale placed just above the source I When the mirror is rotated through a small angle 0 the spot of the light is found to move through a distance y on the scale The angle 0 is given by 2017 a c y X X y b d X 2y y 2x u