If there is no Sun, the colour of the sky would be ________
Answer: Option D
Solution(By Examveda Team)The sky appears blue because the sunlight is scattered by the gas molecules in the atmosphere - a phenomenon known as Rayleigh scattering - named after the discoverer - a British physicist who also discovered Argon - Lord Rayleigh (1842-1919). So, if there was no atmosphere, the sky would appear black.
A. Vertical motion of these heavenly bodies
B. Motions of the earth
C. Atmospheric refraction
D. These are visible because of light of the sun reflected from their surface