What would be the colour of the sky on a planet if there was no atmosphere?

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Blue

Black

Red

Green

answer is B.

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Detailed Solution

The colour of the planet would be black.
On our planet, the sky appears blue due to the scattering of light in the atmosphere. However, when this atmosphere is absent, there would be no light scattering. Hence, the sky will be a dark colour, or in other words, it will appear black in colour.

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