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In Young's double slit experiment, an in...

In Young's double slit experiment, an interference pattern is obtained on a screen by a light of wavelength 6000 `overset(circ)(A)` coming from the coherent sources `S_(1) and S_(2)`. At certain point P on the screen third dark fringe is formed. Then, the path difference `S_(1) P – S_(2) P` in micron is

A

`0.75`

B

`1.5`

C

`3.0`

D

`4.5`

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The correct Answer is:
B
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In Young's double slit interference experiment the wavelength of light used is 6000 overset(circ)(A) .If the path difference between waves reaching a point P on the screen is 1.5 mu , then at that point P.

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