State whether the following statement is true or false:

The sky appears dark instead of blue to an astronaut.

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True

False

answer is A.

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Detailed Solution

The given statement is true.
Concept: Scattering of light is the phenomena in which light rays deviate from their straight course when they collide with an obstruction such as dust or gas molecules, water vapours, and so on. The scattering of light causes numerous strange phenomena, such as the Tyndall effect.
When light dispersion occurs, the sky appears blue. Because there is no atmosphere in space, light does not disperse into its constituent hues, hence an astronaut in space sees the sky as black rather than blue.
The small molecules of air in Earth's atmosphere disperse blue light in all directions. Blue is more diffused than other hues because it travels in smaller, shorter waves. This is the phenomena that gives us blue skies most of the time.
Hence, the given statement is true.

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