Question

what is depression of light​

Answer 1

depression not despertion

despertion of light means when the white light disperse from prism into seven colours (VIBGYOR) it is know as dispersion of light

Answer 2

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$\bold{\underline{Dispersion\:of\:light:}}$


$\sf{\underline{In\:simple\:words,}}$

Dispersion is the phenomenon of splitting up of a composite light into its component colours.

The light which we see is actually composed of seven different coloured light-rays of different wavelength.


$\sf{\underline{Example:}}$ Sunlight


When a composite light passes through a prism, the component colours undergo deviation at both refracting faces.

The extent of deviation depends on the wavelength.


$\sf{\underline{This\:results\:in,}}$

$\sf{\underline{The\:splitting\:up\:of\:the\: composite\:light.}}$


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