There is no atomosphere on moon because

Options

A. it is closer to earth
B. it revolves round the earth
C. it get light from the sun
D. the escape velocity of the gas molecules is less than their root mean square velocity here

Answer

D

Explanation

As, the escape velocity on the surface of moon is small i.e,. `2.4km//s` in comparision to `11.2km//s` that of earth sand also this velocity is smaller than rms velocity of gas molecules, therefore gas molecules escape moon's gravitationa. Thus, moon cannot have atmosphere.