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The central fringe shifts to the positio...

The central fringe shifts to the position of fifth bright fringe, if a thin film of refractive index 1.5 is introduced in the path of light of wavelength `5000 Å`. The thickness of the glass plate is

A

`1 mum`

B

`5 mum`

C

`3 mum`

D

`4 mum`

Text Solution

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The correct Answer is:
B
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