| 单词 | electromagnetic wave |
| 释义 | > as lemmaselectromagnetic wave electromagnetic wave n. a wave consisting of a travelling periodic fluctuation in both an electric and a magnetic field, these fields being at right angles to each other and to the direction of propagation of the wave; cf. electromagnetic radiation n. ΚΠ 1883 Proc. Amer. Philos. Soc. 1882–3 20 424 The æthereal particles..‘subside’ spirally towards the poles, giving rise to Ampérian currents which account for Maxwell's identification of luminous and electromagnetic waves. 1929 E. Mallett Telegr. & Telephony xi. 281 Whenever an electric current changes in a circuit, energy in the form of electromagnetic waves is radiated away from the circuit. 1985 Times 27 Dec. 12/2 He might then have grasped that electromagnetic waves penetrate more deeply than armies. 2003 M. Haddon Curious Incident of Dog in Night-time 42 The gravity of a black hole is so big that even electromagnetic waves like light can't get out of it. < as lemmas |
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