A point source of light S, placed at a distance L in front of the centre of a plane mirror of width 1 m, hangs vertically on a wall.
A man walks in front of mirror along a line parallel.
To the mirror at a distance 2L from mirror as shown in the above figure. Distance upto which source is visible to man is
(a) 1 m
(b) 2 m
(c) 3 m
(d) 4 m
