| 单词 | negative glow |
| 释义 | > as lemmasnegative glow negative glow n. Physics (in a low-pressure discharge tube) a luminous region in the vicinity of the cathode, from which it may be separated by the Crookes dark space. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > discharge of electricity > [noun] > dark space at low pressure > luminous space between negative glow1838 1838 M. Faraday in Philos. Trans. (Royal Soc.) 128 i. 138 A purple stream..appeared on the end of the positive rod,..but never joining the negative glow, there being always a short dark space between. 1939 H. J. Reich Theory & Applic. Electron Tubes xi. 369 The brightness of the negative glow decreases toward the anode, and the glow gradually merges into another relatively dark region, the Faraday dark space. 1971 J. F. Waymouth Electr. Discharge Lamps iv. 71 In the negative glow, the rate of ion production required to supply a cathode ion current of 10% of the total may be many times what it is in the positive column. < as lemmas |
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