Question

explain the following
1. sky appears blue
2. the sun appears reddish at sunset and sunrise​

Answer 1

Answer:

1. Light from the sun reaches the atmosphere that is comprised of the tiny particles of the atmosphere. These act as a Prisoner and caused the different components to scatter. As blue light travels in shorter and smaller waves in comparison to the other colours of spectrum. It is scattered the most, causing the sky to appear bluish.

2. The molecules of the atmosphere and other particle that are smaller than the longest wavelength of visible light are more effective in a scattering light of shorter wavelength and light or longer wavelengths. The amount of scattering is inversly propotional to fourth power of the wavelength (Rayleigh effect) Light from the sun nea the horizon passes to a greater distance in the earth's atmosphere and then does the light receive when the sun is overhead.

The correspondingly greater scattering of short wavelengths accounts for the reddish appearance of the Sun at rising and at setting.