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One side of a glass slab is silvered as ...

One side of a glass slab is silvered as shown. A ray of light is incident on the other side at angle of incidence `i=45^(@)` . Refractive index of glass is given as `1.5`. The deviation of the ray of light from its initial path when it comes out of the slab is

A

`90^(@)`

B

`180^(@)`

C

`120^(@)`

D

`45^(@)`

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The correct Answer is:
a
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