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In the ideal double-slit experiment, whe...

In the ideal double-slit experiment, when a glass-plate (refractive index 1.5) of thickness t is introduced in the path of one of the interfering beams (wavelength `lambda`), the intensity at the position where the central maximum occurred previously remains unchanged. The minimum thickness of the glass-plate is

A

`2 lambda`

B

`(2lambda)/(3)`

C

`(lambda)/(3)`

D

`lambda`

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The correct Answer is:
A
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