Question

Why Sunset or sunrise appears reddish? ( need full explanation)​

Answer 1

Answer:

Within the visible range of light, red light waves are scattered the least by atmospheric gas molecules. So at sunrise and sunset, when the sunlight travels a long path through the atmosphere to reach our eyes, the blue light has been mostly removed, leaving mostly red and yellow light remaining.

Explanation:

Answer 2

$\huge{\mathcal{\purple{A}\green{n}\pink{s}\blue{w}\purple{e}\green{r}\blue{⋆}}}$

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.