Question

explain the dispersion of white light by glass prism in detail

Answer 1

It is due to refraction.
White light is a combination of seven colours each having different wavelength and different deviation due to refraction.
Colour components are VIBGYOR.
The absorption and re-emission process causes the higher frequency (lower wavelength) violet light to travel slower through crown glass than the lower frequency (higher wavelength) red light. It is this difference in n value for the varying frequencies (and wavelengths) that causes the dispersion of light by a triangular prism. Violet light, being slowed down to a greater extent by the absorption and re-emission process, refracts more than red light. Upon entry of white light at the first boundary of a triangular prism, there will be a slight separation of the white light into the component colors of the spectrum. Upon exiting the triangular prism at the second boundary, the separation becomes even greater and ROYGVIB is observed.
n is index of refraction.And it is 1.53 for violet light in crown glass.

Hope you can understand.

Thanks.
Tripathy.

Answer 2

$\star{\mathbb{\underline{ANSWER:}}}$

Dispersion of Light' can be defined as the splitting of white light when it passes through a glass prism into its constituent spectrum of colors (i.e. violet, indigo, blue, green, yellow, orange and red).

The white light splits into its constituent colors at various frequencies and various angles.

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