Dispersion of light.

1. The phenomenon of splitting of light into its component colours is dispersion.
   
2. Sir Issac Newton was the first to use a glass prism to obtain the spectrum of sunlight.
   
3. A prism is a transparent medium bounded by two plane surfaces inclined at an angle.
   
4. When white light is dispersed into seven colours by a prism, different colours of light bend through different angles with respect to incident ray.
   
5. Out of these seven colours, red light bends the least while violet light bends the most, as each colour bends in different angle all colours become separate and we get a spectrum of seven different colours.