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Among two interfering sources, let S1 be...

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

A

`3pi`

B

`(5pi)/2`

C

`(7pi)/2`

D

`4pi`

Text Solution

Verified by Experts

The correct Answer is:
B
`Delta phi_1 = pi/2`
`Delta phi_2 = ((2pi)/lambda) (Deltax)`
`= ((2pi)/lambda) (1.5 lambda)`
` = 3pi `
`:. Delta phi_("net") = Delta phi_2 - Delta phi_1 = (5pi)/2` .
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