- radiation consisting of self-sustaining oscillating electric and magnetic fields at right angles to each other and to the direction of propagation. It does not require a supporting medium and travels through empty space at the speed of light
| 单词 | electromagnetic radiation |
| 释义 | WordReference Random House Unabridged Dictionary of American English © 2024 electromagnet′ic radia′tion, [Physics.]
Collins Concise English Dictionary © HarperCollins Publishers:: electromagnetic radiation n
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