Question

What is dispersion of white light. What are it's cause.

Answer 1

splitting of white light in seven colours is called dispersion of light
Causes
•light bends at different angles for different colours due to differences in their wavelengths

Answer 2

Splitting of white light into it's seven different components is known as dispersion of light.

Causes-

-every color has it's own characteristics wavelength/ frequency.

Different color move with same speed in air . But their speeds in refracting media like glass are different .

- As a result different color under go different deviations on passing through prism .

- hence different color emerge from the prism and cause dispersion.