Question

Write short notes on dispersion of light.

Answer 1

The phenomenon of splitting of light into its component colours is dispersion of light. The band of coloured components of a light beam is called its spectrum. When white light is dispersed into seven colours by a prism, different colours of light bend through different angles with respect to incident ray. Out of these seven colours, red light bend the least while violet light bends the most. So the rays of each colour emerge along different paths and become distinct.Hence we get a spectrum of seven different colours in the sequence, Violet, Indigo, Blue, Green, Yellow, Orange and Red.