Q. At sunrise or sunset, the sun looks red because

A
the sun is coldest at these times
B
due to the effects of reflection and refraction
C
the sun is hottest at these times
D
due to scattering of light
Solution:

During sunrise and sunset, the rays have to travel a larger part of the atmosphere because they are very close to the horizon. Therefore, light other than red is mostly scattered away. Most of the red light, which is the least scattered, enters our eyes. Hence, the sun and the sky appear red.

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