Among two interfering sources, let `S_1` be ahead of the phase by `90^@` relative to `S_2`
Channel: Doubtnut
Date: 12/07/2020

Among two interfering sources, let `S_1` be ahead of the phase by `90^@` 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