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Q.

Is it true that the sky appears red-orange at sunset and sunrise because of the least scattering of red light?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is true.
The sky appears red-orange at sunset and sunrise because of the least scattering of red light.
During sunrise, the Sun is aligned with the horizon. So the light has to travel through the bigger portion of the earth’s atmosphere. Components of the white light of shorter wavelengths are scattered away. Only the red light of a larger wavelength enters the earth without scattering, and the sky appears red. The sky appears red-orange at sunset and sunrise because the wavelength of red-orange is maximum, so the light of these colours scatters the least.
 
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Is it true that the sky appears red-orange at sunset and sunrise because of the least scattering of red light?