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Two monochromatic coherent point sources...

Two monochromatic coherent point sources `S_(1)` and `S_(2)` are separated by a distance >. Each source emits light of wavelength `lambda` where `L gt gt lambda`. The line `S_(1)S_(2)` when extended meets a screen perpendicular to it at point A. Which of the following is correct ?

A

The interference fringes are circular in shape

B

Interference fringes are straight lines perpendicular to line `S_(2)S_(2)A`

C

On the point A intensity is maximum if `L = n lambda` (n is an integer)

D

Point A is always an intensity maximum for any separation L

Text Solution

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The correct Answer is:
A, D
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