A light ray entered a rectangular glass slab. if $i$ be the angle of incidence and $e$ be the angle of emergence, then:

e < i

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e = i

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e > i

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i \neq e

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Solution

The correct option is B $e = i$
For a parallel glass slab, emergent ray is parallel to the incident ray and angle of emergence is equal to the angle of incidence. This holds true irrespective of the nature of medium in the glass slab.

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