Which phenomenon explains why the sky appears blue?
A
Scattering of blue light by atmospheric molecules
B
Reflection of ocean colour
C
Absorption of blue light by clouds
D
Refraction through ice crystals
Correct Answer: Option A — Scattering of blue light by atmospheric molecules
Explanation:
The sky appears blue due to Rayleigh scattering where shorter blue wavelengths of sunlight are scattered more strongly by atmospheric gas molecules than longer wavelength red light.