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In Young's double slit experiment a mica...

In Young's double slit experiment a mica plate of refractive index `mu` is introduced in the path of light coming from one of the slit . If the central bright frige gets shifted to the point originally occupied by the fourth bright fringe, then the thickness of the mica plate will be ( symbols have their usual meaning )

A

`( 2 lambda)/((mu -1))`

B

`( 4 lambda )/( 3( mu - 1))`

C

`( 4 lambda)/( ( mu-1))`

D

`( 2 lambda)/( 3( mu - 1))`

Text Solution

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The correct Answer is:
C
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