Q.

When white light passes through a glass prism, one gets spectrum on the other side of the prism. In the emergent beam, the ray which is deviating least is or Deviation by a prism is lowest for

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a

Violet ray

b

Green ray

c

Red ray

d

Yellow ray

answer is C.

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Detailed Solution

δ∝(μ−1)⇒μR is least so δR is least.
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When white light passes through a glass prism, one gets spectrum on the other side of the prism. In the emergent beam, the ray which is deviating least is or Deviation by a prism is lowest for