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Dispersion through Prisms

A white light...

Question

A white light ray is incident on a glass prism, and it create four refracted rays A, B, C and D. Match the refracted rays with the colors given (1 and D are rays due to total internal reflection)

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Solution

$μ_{b l u e} > μ_{g r e e n} > μ_{y e l l o w} > μ_{r e d}$ .
So Ray A,B,C, D will be red,yellow, Green and blue respectively.

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