| 单词 | wave number |
| 释义 | > as lemmaswave number wave number n. Physics and Chemistry the number of waves per unit length, used esp. as a spectroscopic unit to represent the frequency of electromagnetic radiation and usually expressed in reciprocal centimetres, cm.−1 (see kayser n.); the reciprocal of wavelength, or this multiplied by 2π; symbol k. ΘΚΠ the world > matter > physics > electromagnetic radiation > [noun] > wavelength > number of waves per unit length wave number1873 1873 Rep. Brit. Assoc. Advancem. Sci. 1872 53 The term wave~numbers appears preferable to the equivalent term ‘inverse wavelengths’ which has been hitherto used. 1936 Physical Rev. 50 59/2 The vector k is called ‘the reduced wave number vector’. 1973 Physics Bull. July 419/2 These devices are characterized by a relatively small tuning range (a few wave-numbers). 1979 Nature 20 Dec. 887/2 It is confusing to find both the chemists' wavenumber (1/λ) and physicists' wavenumber (2π/λ) used in different parts of the text. < as lemmas |
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