Question

An astronaut in a spaceship the sky appears black due to:

• A. Absence of atmosphere in his neighbourhood
• B. Light from the sky is absorbed by the medium surrounding him
• C. The fact at the height, sky radiations are only in the infra-red and the ultraviolet region
• D. None of these

Answer 1

The correct option is A Absence of atmosphere in his neighbourhood

To an astronaut it will appear as black.On earth we see the blue sky due to presence of atmosphere. Atmosphere refracts light ray coming from the sun and we see the colour of sky.In space, due to the absence of the atmosphere the light rays do not refract and reach the astronomer's eyes therefore it appears black.