Human Eye & Colourful World (C10)

Why does the sun appear reddish early in the morning? Will this phenomenon be observed by an astronaut on the Moon? Give reason to justify your answer.


In early morning, sun light has to cover larger distance in the atmosphere. So, the shorter wavelengths scatter out. Only the longer wavelengths like red reach our eye.

On the Moon, this phenomenon will not be observed because the Moon has no atmosphere.

Question 2: Why does the Sun appear reddish early in the morning? Explain with the help of a labelled diagram.

Due to scattering of blue light / light of shorter wavelengths, light of longer wavelengths / red component of light reaches our eyes. This gives reddish appearance of the sun.