Question

Define dispersion of light what is its cause ? ​

Answer 1

Explanation:

It is defined as the process of splitting up of white light into its constituent colour on passing through a prism .

We know that for small angle prism .

$ = (u - 1) A , here $ is deviation and u is refractive index .

Also according to Cauchy's formula , we know that

✳ u directly proportional 1/L² , here L is wavelength

Thus due to different Values of angle of deviation , each colour occupies different direction in emergent beam of light nd thus constituent colours of white light get disappeared

Lv < Lr < So $v > $r

The violet colour deviate more than the red colour .

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Answer 2

Answer:

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