| 单词 | near, far infra-red |
| 释义 | > as lemmasnear, far infra-red The infra-red part of the spectrum; near, far infra-red, the part close to, or far from, the visible spectrum. ΘΚΠ the world > matter > physics > electromagnetic radiation > light > chromatism > [noun] > spectrum > types of Fraunhofer spectrum1837 gas spectrum1859 interference spectrum1860 flame spectrum1862 absorption spectrum1864 fluorescence spectrum1867 band spectrum1869 comparison spectrum1877 infra-red1881 emission spectrum1888 X-ray spectrum1910 1881 London, Edinb. & Dublin Philos. Mag. 11 167 Experiments supposed to prove the existence of lines in the infra-red. 1887 Encycl. Brit. XXII. 376/1 Becquerel finds lines in the infra-red at 11,420. 1923 R. Glazebrook Dict. Appl. Physics IV. 533/2 Such solids as rock-salt have a very strong absorption band for light in the far infra-red. 1937 F. A. Jenkins & H. E. White Fund. Optics i. 13 On the long-wavelength side of the visible lies the infrared, which may be said to merge into the radio waves at about 4 × 10–2 cm. 1960 Conn & Avery Infrared Methods p. v By restricting attention to the range from 1 to 25μ we have limited the interest to the ‘near infrared’ but even this embraces a range of some four to five octaves. 1966 Houghton & Smith Infra-Red Physics i. 1 The infra-red is that region of the electromagnetic spectrum which lies between the visible and microwave regions, i.e. between wavelengths of about 8000 Å (= 0·8 μ) and 1 mm. 1973 Sci. Amer. Feb. 89/2 The laser's output was in the infrared. < as lemmas |
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