A sound wave is a mechanical wave, not an electromagnetic wave. This means that

particles of the medium move perpendicular to the direction of energy transport

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a sound wave transports its energy through a vacuum

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particles of the medium regularly and repeatedly oscillate about their rest positions

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a medium is required for sound waves in order to transport energy

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Solution

The correct option is D
a medium is required for sound waves in order to transport energy

A mechanical wave can not propagate energy without a medium.
An electromagnetic wave is a transverse non-mechanical wave. It can transport energy through a vacuum.
It is mentioned that the sound wave is a mechanical wave. Therefore, a medium is required for a sound wave to propagate energy.
Hence, the correct option is (d).

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Similar questions

Q. An electric field

\vec{E}

and a magnetic field

\vec{B}

exist in a region. The fields are not perpendicular to each other.
(a) This is not possible.
(b) No electromagnetic wave is passing through the region.
(c) An electromagnetic wave may be passing through the region.
(d) An electromagnetic wave is certainly passing through the region.

Our eyes respond to electromagnetic waves of frequency ranging from 400 THz to 790 THz. Our eyes are not built to respond to sound which is a mechanical wave. Does this mean that there could be some other animals who could respond to mechanical waves and thus see sound?

Is ultrasound a mechanical wave or an electromagnetic wave?

Assertion: Sound waves do not travel through the vacuum.

Reason: Sound waves are mechanical waves that require a medium for their propagation.

Sound wave is a mechanical wave, which means, unlike light, it needs a medium for propagation.

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