Question

Write a short note on light

Answer 1

1. Light is an electromagnetic radiation which can be detected by human eye.
2. It shows the properties of both waves and particles.
3. Light exists in tiny energy pockets known as photons. The light wave has frequency as well as wavelength.
4. The other main properties of light are intensity, propagation direction , frequency or wavelength spectrum and polarization.
5. Its speed in vacuum is $3\times {10}^8\raisebox{1ex}{$m$}\!\left/ \!\raisebox{-1ex}{$s$}\right.$.
6. The study of light is known as optics.