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In the arrangement shown, a screen is pl...

In the arrangement shown, a screen is placed normal to the line joining the two point coherent sources `S_(1)` and `S_(2)`. The interference pattern consist of concentric circles. `lambda` is the wavelength of light `(D gt gt d)`.

The phase difference of the interfering light at point P is

A

`(2pi)/lambda d cos theta `

B

`(2pi)/lambda d . Cos^(3) theta `

C

`(2pi)/lambda d cos^(2) theta`

D

`(2pi)/lambda (d)`

Text Solution

Verified by Experts

The correct Answer is:
A
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Knowledge Check

  • In the case of light waves from two coherent sources S_(1) and S_(2) , there will be constructive interference at an arbitrary point P, the path difference S_(1)P - S_(2)P is

    A
    `(n+(1)/(2))lambda`
    B
    `n lambda`
    C
    `(n- (1)/(2))lambda`
    D
    `(lambda)/(2)`

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