Question

What is Tindall effect explain why is the colour of the clear sky is blue ?

Answer 1

Tyndall effect, also called Tyndall phenomenon, scattering of a beam of light by a medium containing small suspended particles—e.g., smoke or dust in a room, which makes visible a light beam entering a window.

Gases and particles in Earth's atmosphere scatter sunlight in all directions. Blue light is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time.

Answer 2

1. Scattering of light by colloidal particles is called Tyndall effect.
2. Due to scattering of light of short wavelength (I.e.Blue) sky looks blue.