Question

Explain giving reason why the sky appears blue to an observer from the surface of the earth? What will the colour of the sky be for an astronaut staying in the international space station orbiting the earth? Justify your answer giving reason.

Answer 1

Sunlight reaches the Earth's atmosphere and is scattered in all directions by the gases and particles in the air. Blue light is scattered more than the other colours because it has the shortest wavelength. This is why the sky appears blue to an observer from the surface of the Earth. For an astronaut staying in the international space station orbiting the Earth, the colour of the sky will be black because the light reaching it does not scatter.

Answer 2

Hey Mate

The scattering of various components of sunlight is purely dependent on the wavelength of the light. Sunlight, reaching the surfaces of the earth is scattered in all directions by the gasses and particles present in the atmosphere. Blue light having shortest wavelength is scattered most by the atmospheric particles. Thus, sky appear blue to an observer from the surface of the earth.

For an astronaut staying in the international space station orbiting the earth, the colour of the sky will be black because the light reaching it does not scatter. Scattering is absent at higher altitudes...


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