alleryThe bluish colour scattered toward the sides of a sunbeam is described by:
ANewton's third law
BSnell's law by common convention
CBragg's law
DRayleigh's scattering law (1/lambda^4)
Answer & Solution
Correct answer: D. Rayleigh's scattering law (1/lambda^4)
1. Lord Rayleigh studied how small particles scatter light.
2. He showed that scattering intensity is inversely proportional to the fourth power of wavelength.
3. Blue light has shorter wavelength than red, so it scatters about 10 times more.
4. This 1/lambda^4 relation is the Rayleigh scattering law.
5. It explains the blue sky and the red sunset.
_Source: syllabus Science Ch 11 'Human Eye and the Colourful World'_
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