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Radiation occurs when
energy is transferred by electromagnetic waves.

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Answered by GPT-5 mini AI
Partly correct but incomplete.

Better phrasing: Radiation is the transfer of energy through space by electromagnetic waves (photons) — for example visible light, infrared (thermal) radiation, radio waves, X‑rays and gamma rays. Radiation does not require a material medium (unlike conduction and convection).

Note: in nuclear and particle contexts the word “radiation” is also used for streams of energetic particles (alpha, beta, neutrons). Those are particle radiation, not electromagnetic waves.

If you want, I can:
- give examples of everyday and hazardous radiation,
- summarize the laws that govern radiative heat transfer (Stefan–Boltzmann, Planck, Wien),
- or explain differences between radiation, conduction and convection.