Sound requires a material medium
NASA
NASA explains that sound is a mechanical wave and cannot propagate through a vacuum without a medium.
Based on: NASA
Verdict
False
Verification confidenceHigh
Explanation
No. Sound cannot travel through a vacuum because it needs a material medium, such as air, water or a solid, to transmit vibrations.
NASA distinguishes mechanical waves, including sound, from electromagnetic waves. The latter can cross a vacuum. ESA likewise explains that sound cannot travel through the vacuum of space, although spacecraft interiors can be noisy.
The distinction is between a vacuum and places containing matter. Sound inside an air-filled spacecraft does not contradict the rule, and a radio signal crossing space is not a sound wave travelling through that vacuum.
Key takeaway
Sound needs a material medium. Electromagnetic waves, including radio, do not.
Evidence
Contradicts the claim
Spacecraft interiors differ from the surrounding vacuum
European Space Agency
ESA states that sound cannot travel through the vacuum of space, while noting that spacecraft interiors can be loud.
Based on: European Space Agency
Radio waves are electromagnetic waves
NASA
Electromagnetic waves can propagate through a vacuum, explaining why radio transmission does not require sound to cross empty space.
Based on: NASA
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