A torch is switched on and dropped on a reflecting surface g/2 meters below. Initial light beam reaches the torch after getting reflected from the polished surface and is reflected back by the torch, and so on. If speed of light is c then total distance covered by the initial beam of light is
A) g
B) g/2
C) c
D) c/2
Correct Answer:
B
Solution :
:\[g/2\]after which initial light beam falls on the reflecting surface.