Sound waves are mechanical waves that require a medium (such as air, water, or solid material) to travel from one point to another. The Moon has virtually no atmosphere, meaning it is essentially a vacuum. In a vacuum, there are no particles close enough together to transmit sound vibrations. Therefore, sound cannot propagate on the Moon's surface.
An Astronaut cannot hear his companion at the surface of the moon because
Asked in UPPSC Upper Mains 2013 · Topic: Sound (Nature and Propagation of Sound Waves)
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