| 单词 | positive rays |
| 释义 | > as lemmaspositive rays positive rays n. Physics (now chiefly historical) rays formed by streams of positive particles; spec. = canal rays n. at canal n. Compounds 3; also singular when used attributively. ΘΚΠ the world > matter > physics > atomic physics > ion > [noun] > stream moving toward cathode positive rays1903 1903 J. J. Thomson Conduction Electr. through Gases xvii. 522 On the view of the discharge given in Chap. xvi. there is a stream of positively charged molecules moving towards the cathode, causing this to emit cathode rays; if the cathode is perforated, part of this stream may pass through the holes, producing in the gas behind the cathode luminosity, forming in fact the Canalstrahlen, or positive rays as we may call them, if we think this view of their constitution sufficiently established. 1920 F. W. Aston in London, Edinb., & Dublin Philos. Mag. 6th Ser. 39 625 A positive ray spectrograph capable of giving a focussed mass-spectrum is..described. 1955 C. G. Darwin in W. Pauli Niels Bohr & Devel. Physics 9 Many elements in a positive-ray tube form temporary hydrides. 1968 M. S. Livingston Particle Physics ii. 20 Thomson's studies of the positive rays from ionized hydrogen gas were the first experiments in which the proton was isolated and identified as a particle. < as lemmas |
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