Which atmospheric phenomenon causes the sky to appear blue during the day?
A
Reflection of ocean water
B
Scattering of sunlight by atmospheric particles
C
Absorption of red light by clouds
D
Refraction through ice crystals
Correct Answer: Option B — Scattering of sunlight by atmospheric particles
Explanation:
The sky appears blue because shorter blue wavelengths of sunlight are scattered more strongly by atmospheric gas molecules compared to longer wavelengths like red through Rayleigh scattering.