Why does the sky appear dark instead of blue to an astronaut?

During the day (daylight) the sky has a blue appearance because the Sun’s light (white light) is made up of rainbow of colors (red, orange, yellow, green, blue, indigo and violet)...

(c) violet and blue lights get scattered more than lights of all other colours by the atmosphere

The molecules of air and other fine particles in the atmosphere have a size smaller than the wavelength of visible light. These are more effective in scattering light of shorter...

Reallignment of molecules takes place due to movement because of constant heating and cooling.

[Hint : Due to scattering of blue light by dust particles and water suspended in air.]

The sky appears dark instead of blue to an astronaut because there is no atmosphere containing air in the outer space to scatter sunlight. As there is no scattered light...

For scattering of light, particles are required. Since there are no particles in space, the sky appears dark to astronauts.

The fine particles in the atmosphere scatter light of shorter wavelength (blue color) more strongly than the light of longer wavelength (red color). Therefore, the sky appears blue from the surface...

The phenomenon in which a part of the light incident on a particle is redirected in different directions

This is because of scattering of light. Light from the Sun near the horizon passes through larger distance in the earth’s atmosphere before reaching our eyes. So, most of the...