Question

explain the deviation of light by prism in short
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Answer 1

Answer:

When a light ray enters one refracting surface of the prism, it bends towards the normal and when it emerges out of the other refracting surface it bends away from the normal. The angle between the incident ray and the emergent ray is the angle of deviation.

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Answer 2

Answer:

Deviation of light ray when it travels from air to glass prism and then again glass prism to air is illustrated in the right side of the figure.