Question

During sun rise or sun set sun appears red.why?

Answer 1

Answer:

due to refraction of sunlight

Explanation:

when sunlight enters Earth's atmosphere the air become more denser down i.e. as it come from ozone to ground hence air refractive index increases and there is more refraction of lignt

Answer 2

Answer:

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.