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Refraction through a Rectangular Glass Slab

After refract...

Question

After refraction through a rectangular glass slab the emergent ray is

A

totally internally reflected.

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B

collinear to incident ray.

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C

perpendicular to incident ray.

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D

parallel to incident ray.

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Solution

The correct option is D
parallel to incident ray.

The extent of bending at opposite parallel faces is equal and opposite. Thus, emergent ray is parallel to incident ray.

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