What is the role of a medium in the propagation of sound?
A medium provides particles that carry sound vibrations
Sound is a mechanical wave, so it travels only when material particles are available to vibrate and pass energy from layer to layer.
The medium supplies these particles: they oscillate about their mean positions and hand kinetic energy to their neighbours, forming compressions and rarefactions that move outward.
Sound cannot travel through a vacuum, which is why option 3 is wrong; a medium does not obstruct sound (option 2) and cannot convert it into light (option 4).
Hence, a medium provides particles that carry sound vibrations.
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Which of the following is related to Doppler effect?
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