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A ray of light incident from air on a gl...

A ray of light incident from air on a glass plate of refractive index n is partly reflected and partly refracted at the two surfaces of the glass. The displacement `y_(0)` in the figure is

A

`(2dsin theta)/sqrt(n^(2)-sin^(2)theta)`

B

`(2dsin theta)/sqrt(sin^(2)theta-(1)/(n^(2)))`

C

`(2dsqrt(n^(2)-sin^(2)theta))/(sintheta)`

D

None of these

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