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What type of wave does not need matter to carry energy?
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GPT-5 mini
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Electromagnetic waves (for example light, radio, X‑rays) do not need matter to carry energy — they are oscillations of electric and magnetic fields that can travel through a vacuum.
(As an additional note, gravitational waves also propagate through spacetime without a material medium.)
(As an additional note, gravitational waves also propagate through spacetime without a material medium.)
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