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In Young's double slit experiment, the t...

In Young's double slit experiment, the two slits act as coherent sources of equal amplitude A and wavelenth `lambda`. In another experiment with the same setup the two slits are sources of equal amplitude A and wavelength `lambda` but are incoherent. The ratio of the intensity of light at the midpoint of the screen in the first case to that in the second case is

A

`1:1`

B

`2:1`

C

`4:1`

D

none of these

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The correct Answer is:
B
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