Question

Drawing necessary ray diagram, prove with the help of prism that white light of Sun is mixture of different colours.

Answer 1

$\left(i\right)$ The formation of spectrum of seven colors shows that white light is a mixture of seven colors (or seven colored light). The effect of transparent medium (like glass prism) is only to separate the seven colors of white light.

$\left(ii\right)$ White light is a mixture of lights of seven colors: red, orange, yellow, green, blue, indigo and violet. The dispersion of light occurs because the angle of refraction (or the angle of bending) of lights of different colors is different when passing through the transparent medium (glass prism).