In a photometer two sources of light when placed at 30 and 50 cm respectively produce shadow of equal intervals. Their candles are in the ratio of

Q. In a photometer two sources of light when placed at 30 and 50 cm respectively produce shadow of equal intervals. Their candles are in the ratio of

A.            9/25

B.            16/25

C.            3/5

D.            6/25

Answer: 9/25