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The reddish appearance of the sun at sunrise and sunset is due to

1. the colour of the sky
2. the scattering of light
3. the polarisation of light
4. the colour of the sun

Correct answer: the scattering of light

Solution

The reddish appearance of the sun at sunrise and sunset is due to the scattering of light. Shorter wavelengths (blue and violet) are scattered more, leaving longer wavelengths (red) to dominate the observed color.

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