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

Among two interfering sources, let A be ahead in phase by 54^(@) relative to B . If the observations be taken from point P , such that PB - PA = 1.5 lambda , deduce the phase difference between the waves from A and B reaching P .

Among the two interfering monochromatic sources A and B, A is ahead of B in phase by 66^@ . If the observation be taken from point P, such that PB-PA=lambda//4 . Then the phase difference between the waves from A and B reaching P is

Among the two interfering monochromatic sources A and B, A is ahead of B in phase by 66^@ . If the observation be taken from point P, such that PB-PA=lambda//4 . Then the phase difference between the waves from A and B reaching P is

The phase difference between the two waves reaching an arbitary point P from S_1 and S_2 is given by

A coherent light is incident on two paralle slits S_(1) and S_(2) . At a point P_(1) the frings will be dark if the phase difference between the rays coming from S_(1) and S_(2) is

Three coherent sources S_(1), S_(2)" and" S_(3) can throw light on a screen. With S_(1) switched on intensity at a point P on the screen was observed to be I. With only S_(2) on, intensity at P was 2I and when all three are switched on the intensity at P becomes zero. Intensity at P is I when S_(1)" and" S_(2) are kept on. Find the phase difference between the waves reaching at P from sources S_(1) "and" S_(3) .

Two waves of equal amplitude a from two coherent sources (S_1 & S_2) interfere at a point R such that S_2R-S_1R =1.5 lambda The intensity at point R Would be

Two waves of equal amplitude a from two coherent sources (S_1 & S_2) interfere at a point R such that S_2R-S_1R =1.5 lambda The intensity at point R Would be