Question

two uses of concave mirror and write a short note about dispersion of light ?

Answer 1

Concave mirrors are used in reflecting telescopes. They are also used to provide a magnified image of the face for applying make-up or shaving.

Dispersion. Visible light is actually made up of different colors. Each color bends by a different amount when refracted by glass. That's why visible light is split, or dispersed, into different colors when it passes through a lens or prism.

Answer 2

Dispersion of light means splitting of light into different colours like: seven colours are yellow , purple, orange.