Question

I need to know why colour of sun appear red during sunrise and sunset?​

Answer 1

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.

Answer 2

the colour of sun appear reddish at time of sunset and sunrise because at that time it's located just near the horizon so it has to pass through denser layers of air so only red light can pass through most dense layers hence it is scattered the least and the sun appears reddish