What is meant by scattering of light ? Use this phenomenon to explain why the clear sky appears blue or why the sun appears reddish at sunrise.

Explanation

Scattering is a phenomenon where a beam of light is absorbed and then re-emitted in different directions when it interacts with particles. Blue colour is scattered the most and red colour the least by air molecules and particles in the earth.s atmosphere. At distance or sunst, sunlight will have to pass through longer distance in the atmosphere. Then, blue colour [shorter wavelength] would have been mostly removed by scattering leaving behind red colour [longer wavelengths] which reaches our eyes. Thus, at sunset or sunrise, the sun appears orange in colour.