Is it true that the emergent ray is parallel to the incident ray in a prism?

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True

False

answer is B.

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Detailed Solution

The above statement is false.
In a prism, light refraction of light occurs at two inclined faces, so the emergent ray is not parallel to the incident ray but is deviated toward the base of the prism. On the other hand, in a glass slab, the refraction of light occurs at two parallel faces, so the emergent ray is parallel to the incident ray with a lateral shift.
The correct statement would be that the emergent ray is not parallel to the incident ray in a prism.
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