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Refraction through a Rectangular Glass Slab

A ray of ligh...

Question

A ray of light is incident perpendicularly on a glass slab. The angle of incidence is :

A

0^{\circ}

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B

45^{\circ}

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C

90^{\circ}

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D

180^{\circ}

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Solution

The correct option is A $0^{\circ}$
The angle of incidence is the angle between the incident ray and the normal. if the ray is incident on the surface normally, this angle is 0; hence correct answer is A.

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