Sir , please explain this -

Asked by  | 7th Mar, 2013, 10:35: PM

Expert Answer:

The amount by which a light bends depends on the refractive index of a glass with respect to that light, which is a frequeny dependent quantity.
Thus, since different colours have different frequencies and hence, different refractive indices, they bend by different amount and disperse.

Answered by  | 9th Mar, 2013, 07:58: AM

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