A point source S is located on a wall. A plane mirror M having length l is moving parallel to the wall with constant velocity v. The bright patch formed on the wall by reflected light will

Options

• Option A

  move with uniform velocity v and will have a length 2l.

• Option B

  move with uniform velocity 2v and will have a length l.

• Option C

  move with uniform velocity 2v and will have a length 2l.

• Option D

  move with uniform velocity but will have a changing length.