Q. A car is fitted with a convex mirror of focal length 20 cm. A second car 2 m broad and 1.6 m height is 6 cm away from the first car. The position of the second car as seen in the mirror or the first car is
A) 19.35 cm
B) 17.45 cm
C) 21.48 cm
D) 15.49 cm
Explanation
(a) $\frac{1}{v} + \frac{1}{- 600} = \frac{1}{20}\ or\ \frac{1}{v} = \frac{31}{600}$
Or $v = \frac{600}{31}cm = 19.35$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.