The optical phenomenon responsible for the blue colour of sky is
dispersion
reflection
refraction
scattering
Answer is Wrong!
Answer is Right!
This question was previously asked in
UPSC CAPF – 2022
This phenomenon is explained by Rayleigh scattering, which states that the amount of scattering is inversely proportional to the fourth power of the wavelength. Shorter wavelengths (like blue and violet) are scattered much more effectively than longer wavelengths (like red and orange).
When sunlight enters the atmosphere, the blue light is scattered in all directions by the atmospheric particles, making the sky appear blue. Our eyes are more sensitive to blue light than violet, contributing to the perception of a blue sky.