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The phenomenon is caused by the dispersion of light, where dispersion is inversely proportional to the fourth power of wavelength, making the observed light predominantly red.

1. The phenomenon is caused by the dispersion of light.
2. Dispersion is inversely proportional to the fourth power of wavelength, making the observed light predominantly red.
3. Dispersion is directly proportional to the fourth power of wavelength, making the observed light predominantly blue.
4. Dispersion is directly proportional to the fourth power of wavelength, making the observed light predominantly green.

Correct answer: Dispersion is inversely proportional to the fourth power of wavelength, making the observed light predominantly red.

Solution

The scattering of light is inversely proportional to the fourth power of wavelength (1/λ⁴). Red light, having the longest wavelength, is scattered the least and thus dominates the light that reaches us.

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