Optics Question 795
Question: A point object $O$is at the center of curvature of a concave mirror. The mirror starts to move at a speed u, in a direction perpendicular to the principal axis. Then, the initial velocity of the image is
Options:
A) 2u, in the direction opposite to that of mirror’s velocity
B) 2u, in the direction same as that of mirror’s velocity
C) zero
D) u, in the direction same as that of mirror’s velocity
Show Answer
Answer:
Correct Answer: B
Solution:
[b] Image velocity (w.r.t mirror) $ =-m\times Objectvelocity $ (w.r.t mirror) Here m=l
