Two plane mirrors. A and B are aligned parallel to each other, as shown in the figure. A light ray is incident at an angle of at a point just inside one end of A. The plane of incidence coincides with the plane of the figure. The maximum number of times the ray undergoes reflections (excluding the first one) before it emerges out is
(a) 28 (b) 30
(c) 32 (d) 34
(b) From the following ray diagram
Therefore maximum number of reflections are 30.