| 单词 | radiation field |
| 释义 | > as lemmasradiation field radiation field n. an extent of space in which there is radiation; spec. the space around an aerial in which there is a continuous outward flow of energy, separated from the aerial by the intervening induction field. ΘΚΠ the world > matter > physics > electromagnetic radiation > electronics > electronic phenomena > [noun] > radiation field radiation field1900 1900 Proc. Royal Soc. 1899–1900 66 377 With Röntgen or uranium radiation fields of 400 or 500 volts a centimetre have sufficed to give saturation in the case of most simple gases. 1924 Physical Rev. 24 339 The energy which is removed from a radiation field..by the positive absorption of quanta by N oscillators all in (n − 1) quantum states. 1928 G. E. Sterling & R. S. Kruse Radio Man. Index 663/1 Radiation field of antenna. 1948 A. L. Albert Radio Fund. xiii. 494 At a distance greater than, say, a few wavelengths from the antenna, the induction field approaches zero, and the radiation field exists. 1971 Nature 20 Aug. 572/1 The ultrasonic field was monitored by a small, sensitized, thermistor probe. 1993 A. C. Clarke Hammer of God 124 Thanks to aeons of bombardment from the radiation fields round Jupiter, it contained a much higher percentage of the heavier isotope deuterium. < as lemmas |
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