| 单词 | cathode ray |
| 释义 | > as lemmascathode ray cathode ray n. a beam of electrons issuing from the cathode of a high-vacuum tube under the action of an electric field. ΘΚΠ the world > matter > physics > electromagnetic radiation > electronics > electronic devices or components > cathode-ray tube > [noun] > cathode ray cathode ray1880 Crookes rays1896 1879 Philos. Trans. (Royal Soc.) 170 144 It excludes such rays of the cathode as impinge upon it from reaching the side.] 1880 London, Edinb. & Dublin Philos. Mag. 10 411 It was further examined whether the negative discharges which excite the green light, the so-called kathode-rays, do really propagate themselves only in straight lines. 1897 Nature 25 Feb. 386/2 Lenard's famous researches on the Kathode rays. 1898 J. J. Thomson Discharge Electr. through Gases 190 We shall call this theory of the cathode rays the ‘corpuscular theory’. 1900 Jrnl. Chem. Soc. 78 ii. 587 Electrical Conductivity in Gases traversed by Cathode Rays. 1912 J. W. Mellor Mod. Inorg. Chem. xliii. 825 The cathode rays is [sic] a stream of negatively charged electrons sent from the cathode with a high velocity. 1927 N. V. Sidgwick Electronic Theory Valency 7 The wave-length of the X-rays given off by various elements when bombarded with cathode rays. 1951 J. R. Partington Gen. & Inorg. Chem. (ed. 2) viii. 184 These cathode rays were discovered in 1859 by Plücker, who showed that they are easily deflected by a magnet. 1957 Encycl. Brit. V. 41/1 Cathode rays have many applications, one of the chief being the excitation of X-rays by the impinging of swift electrons against a hard anticathode. < as lemmas |
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