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A ray of light strikes a glass slab of t...

A ray of light strikes a glass slab of thickness t. It emergens on the opposite face, parallel to the incident ray but laterally displaced. The lateral displacement, `Delta x` is

A

`Delta x = 0`

B

`Delta"x = t sin ( I - r) cos r"`

C

`Delta x =("t sin I")/("cos r")`

D

`Delta x = (" t sin ( I - r)")/("cos r")`

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The correct Answer is:
D
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