Single Answer MCQ
Q-00001684
Why does the sky appear blue during the day?
1
Due to the reflection of light from the sun
2
Due to the scattering of sunlight by the atmosphere
3
Due to the absorption of blue light by the clouds
4
Due to the refraction of light by the ozone layer
Answer and Solution
Answer
B. Due to the scattering of sunlight by the atmosphere
Solution:
The sky appears blue during the day because of Rayleigh scattering, where shorter blue wavelengths of sunlight are scattered more than other colors by the gases and particles in the Earth's atmosphere. This scattering effect makes the sky appear blue to an observer on the ground. Therefore, the correct answer is 'Due to the scattering of sunlight by the atmosphere'.
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