If the earth had no atmosphere, the sky would have looked ______? 

The correct answer is black.

• The colour of the sky is black that an astronaut will see in space.
• Because of the scattering of light particles, the sky appears blue when viewed from the earth.

Key Points

• But when there is an atmosphere, blue light gets refracted.
  • The actual colour of the sky is black.
  • And there is no atmosphere in the space.
  • So the astronauts see the black colour of the sky.
  • There is no scattered light to reach our eyes in outer space.
  • A range of wavelengths of light is emitted by the sky.
  • All the wavelength of light can’t be seen by us.