alleryThe sky appears BLUE because of:
AReflection from oceans
BAbsorption of red by ozone
CScattering of shorter wavelengths by air molecules
DRefraction in clouds
Answer & Solution
Correct answer: C. Scattering of shorter wavelengths by air molecules
1. Rayleigh scattering: intensity scattered ∝ 1 / λ⁴.
2. So blue (short λ) is scattered ~5-10 × more than red (long λ).
3. The scattered blue light reaches our eyes from all directions of the sky.
4. At sunset, sunlight travels through more atmosphere; blue is scattered out, red remains.
_Source: syllabus Science Ch 10 §10.5 Scattering of Light_
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