Question

Blue colour of the sky is due to

• A. absorption of light by dust particles
• B. reflection of light by dust particles
• C. scattering of light by dust particles
• D. presence of clouds which are a colloidal dispersion of water particles in air

Answer 1

Answer: (C)

Blue colour of the sky is due to scattering of light by colloidal dust particles present in air (Tyndall effect).