science
Grade-7
Easy

Question

The angle between the incident ray and the emergent ray for refraction through a glass slab is ___ degrees.

hintHint:

  • The incident ray and emergent ray are parallel to each other.

The correct answer is: 0


    • If 'i' is the angle of incidence and x is the refracted angle then at the second surface also x will be the angle of incidence by alternate angle property.
    • Hence, angle 'i' will be the emergent angle which is equal to the incidence angle. So these two rays will be parallel. Hence, angle between incident ray and emergent ray = 0°. 

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