In the absence of atmosphere, the colour of the sky would be:

Correct option is C

The correct answer is (C)  ​black

Information booster:

o   In the absence of an atmosphere, the sky looks black because there are no particles to scatter sunlight. This scattering process, called Rayleigh scattering, is what causes the sky to appear blue on Earth.

o   During the day, sunlight passes through the Earth's atmosphere. Sunlight, or white light, is made up of many colors.

o   Blue light has a shorter wavelength compared to other colors, so it gets scattered more by air molecules and impurities, making the sky appear blue.

o   In space, the sky appears black to astronauts because there is no atmosphere to scatter light. The same effect occurs on planets and moons without atmospheres, like Mercury and the Moon.