There is no atmosphere on the surface of the moon because

It revolves around Earth

It gets light from Sun

Escape velocity of gas molecules is less than rms velocity

It is closer to Earth

APEDIA

BPSC Prelims

2024 • 04 Jan, 2025 • General

There is no atmosphere on the surface of the moon because

Correct Answer

Escape velocity of gas molecules is less than rms velocity

• **Physics:** For an atmosphere to exist, the Escape Velocity must be higher than the thermal speed (RMS velocity) of gas molecules. • **Moon:** Gravity i......

💡 Analysis & Explanation

• **Physics ▼

** For an atmosphere to exist, the Escape Velocity must be higher than the thermal speed (RMS velocity) of gas molecules.

• **Moon ▼

** Gravity is weak (1/6th of Earth). Escape velocity is low (2.38 km/s).

• **Result ▼

** Gas molecules move faster than escape velocity and fly off into space.

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There is no atmosphere on the surface of the moon because