Question

Intensities of two waves are I & 9I meets at points P & Q. If phase difference between two waves at point P is \(\frac{\pi}2\) and at point Q is π. Then ratio of intensity at P & Q is.

(1) \(\frac12\)

(2) \(\frac32\)

(3) \(\frac52\)

(4) \(\frac42\)

Answer 1

Correct option is (3) \(\frac52\)