Among two interfering sources

PHYSICS · Single correct · CBSE · Physics · Waves · Waves

Problem

Among two interfering sources, let

S_1

be ahead of the phase by

90^\circ

relative to

S_2

. If an observation point

P

is such that

PS_1 - PS_2 = 1.5\lambda

, the phase difference between the waves from

S_1

and

S_2

reaching

P

is (1)

3\pi

(2)

\frac{5\pi}{2}

(3)

\frac{7\pi}{2}

(4)

4\pi