Question

Give reasons:

The sky appears dark to passengers flying at very high altitudes.

Answer 1

1. The blue color of the sky is caused by the scattering of sunlight by air molecules in the earth’s atmosphere.
2. At very high altitudes, the atmosphere becomes extremely thin, and the density of air molecules is very low.
3. Due to the lack of sufficient particles, there is no significant scattering of light at such heights.

As a result, the sky appears dark or black to passengers flying at very high altitudes.