| 单词 | quarter-wave |
| 释义 | > as lemmasquarter-wave quarter-wave adj. Physics (a) adj.having a thickness or a length equal to a quarter of the wavelength of a transmitted or received wave; (b) n.a length or distance equal to a quarter of a wavelength. ΘΚΠ the world > matter > physics > electromagnetic radiation > electronics > electronic phenomena > [adjective] > of specific wavelength quarter-wave1872 1872 J. D. Everett Deschanel's Elem. Treat. Nat. Philos. IV. lxv. 1048 When circularly-polarized light is transmitted through a Fresnel's rhomb, or through a quarter-wave plate, it becomes plane-polarized. 1894 Proc. Royal Soc. 57 81 The electrometer throws were about three times as great with an abnormal part a quarter-wave long as with one a half-wave long. 1939 Econometrica 7 61 We need only put together two operators a quarter-wave apart, to obtain a harmonic operator. 1995 Nature 30 Mar. 409/2 Piezo-ceramic sensors for distance measurements are covered with a quarter-wave layer of aerogel for acoustic impedance. < as lemmas |
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