Choose the correct reason why the following happens.
The Sun appears red at sunrise and sunset.

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The most common colour is blue.

Blue is the least scattered colour.

The most common colour is red.

The red colour is the least scattered.

answer is A.

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Detailed Solution

Scattering of light is the phenomenon in which a light ray is redirected in all other directions after passing through particles with dimensions comparable to the wavelength of the light used.
White light has seven colours: violet, indigo, blue, green, yellow, orange, and red. The wavelength of red light is the longest of the seven constituent colours.
More colours are scattered during the sunset and sunrise hours because light must travel a greater distance.
However, red light does not scatter much due to its long wavelength and reaches our eyes.
Therefore, the sky appears red.

Hence, 'The red colour is the least scattered.' is the correct response.

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