A plane mirror M is arranged parallel to a wall W at a distance l from it. The light produced by a point source S kept on the wall is reflected by the mirror and produces a patch of light on the wall. The mirroo moves with velocity v towards the wall.
Which of the following statement(s) is`//`are correct?

Options

A. The spot of light will move with the speed `v`on the wall.
B. The spot of light will not move on the wall.
C. As the mirror comes closest the spot of light will become larger and shift away from the wall with speed larger then`v`.
D. The size of the light spot on the wall remains the same.

Answer

B,D

Explanation

Since of refrection`anglei= angler`,so spot of light will not move on wall and will have same size of object.