| 单词 | index of refraction |
| 释义 | > as lemmasindex of refraction a. Optics. index of refraction or refractive index (of a medium), the ratio between the sines of the angles of incidence and refraction of a ray of light passing from some medium (usually air) into the given medium. ΘΚΠ the world > matter > physics > electromagnetic radiation > light > refraction > [noun] > index of refraction refractive index1820 index of refraction1829 refraction index1850 1829 Nat. Philos. (Libr. Useful Knowl.) I. Optics ii. 4 The number 1.336, which regulates the refraction of water, is called its index, or exponent, or co-efficient of refraction, and some~times its refractive power. 1871 J. Tyndall Fragm. Sci. (1879) I. xi. 340 The media must possess different refractive indices. index of refraction angle of refraction, axis of refraction, index of refraction, plane of refraction, etc.; conical refraction, double refraction, seismic refraction, etc.: see the first element.extracted from refractionn.< as lemmas |
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