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单词 electromagnetic radiation
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electromagnetic radiation
electromagnetic radiation n. radiation in the form of electromagnetic waves; cf. electromagnetic wave n.Visible light, infrared waves, ultraviolet light, microwaves, gamma rays, and X-rays are all forms of electromagnetic radiation, differing from each other only in their wavelength and frequency.
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1891 Proc. Royal Soc. 1890 48 472 The Rumford Medal has been awarded to Professor H. Hertz for his work on Electro-magnetic Radiation.
1940 G. Gamow Birth & Death of Sun iii. 83 In the heavier elements,..neutrons entering the nucleus must get rid of their energy through electromagnetic radiation, and the nucleus emits hard γ-rays.
2003 Pop. Sci. May 92 (caption) The Humvee-mounted Active Denial System..can strike from at least one-third of a mile away, using a focused beam of electromagnetic radiation.
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更新时间:2024/12/25 1:28:18