MCQ Detailed View

On Earth, the sky looks blue during the day because of Rayleigh scattering. This happens when sunlight passes through the atmosphere, and the shorter blue wavelengths scatter more than red, giving the sky its blue color.

However, in space, there is almost no atmosphere. Without an atmosphere to scatter sunlight, there is nothing to diffuse light in different directions. As a result, the sky appears black to an astronaut, even when the Sun is shining. This is why photos taken from space show the sky as dark black, and stars are visible even during daytime.

This effect is important in Physics and astronomy because it shows how light interacts with matter. It also explains why astronauts need space helmets with visors to reduce sunlight glare, even though the sky itself is black.

Other options are incorrect:

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  Blue is seen only from Earth, not space.

  
  


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  White may appear temporarily due to reflection or camera effects, but it is not the natural color of the sky.

  
  


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  Red occurs on Earth during sunrise or sunset because of scattering, but not in space.

  
  

In short, an astronaut sees the sky as black in space because there is no atmosphere to scatter sunlight. This is a fundamental concept in Physics and space science.