Answer:

The sun appears red at sunrise and sunset because the sun is closer to the horizon during these times of the year. During its journey to our eyes, sunlight passes through a denser layer of air and travels a greater distance than usual. The majority of the blue light is dispersed. Furthermore, we are exposed to the red colour, which causes the sun to appear red at sunrise.

During the day’s shortest day, sunlight needs to travel a shorter distance to reach us. Because the majority of the colours are distributed, the sun appears white in colour at the noon hour.