Question 52 of 70 in Light and Sound

Sound Waves

1 mark · Easy

Sound waves cannot travel through a vacuum. Give a reason why.

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There are no particles in a vacuum to carry vibrations.

Also accept: Sound needs particles to travel, and a vacuum has none.

Common mistakes: Sound needs air; No answer

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Marking points

B1 · 1 mark · States that particles/materials are needed for sound to travel.

Worked solution

Because sound waves need particles to travel, and a vacuum has no particles.

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