question_answer 43)

  The direction of ray of light incident on a concave mirror is shown by PQ while    directions in which the ray would travel after reflection is shown by four rays marked 1,2, 3 and 4, Fig. 6(EP).l Which of the four rays  correctly shows the direction of reflected ray?   (a) 1                                       (b) 2 (03                                          (d)4

Answer:

  (b) In Fig. 6(EP).l, PQ is a ray of light passing through focus, and falling on the surface of a concave mirror. On reflection, from the mirror, the ray becomes parallel to principal axis of the mirror. Choice (b) is correct