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 L. When the mirror is rotated through a small angle θ, the spoy of light is found to move through a distance y on the scale. The angle θ is given by 

(a) y2x

(b) yx

(c) x2y

(d) xy

Explanation is a part of a Paid Course. To view Explanation Please buy the course.

Difficulty Level: