| 释义 |
Snell's law Optics.|snɛlz|
[Named after Willebrord van Roijen Snell (1591–1626), Dutch astronomer and mathematician, who formulated the law in 1621.]
The law which states that for a ray of light passing from one uniform medium to another the sines of the angles of incidence and refraction are always in the same ratio.
1873J. Tyndall On Light i. 24 Snell's law of refraction is one of the corner-stones of optical science, and its applications to-day are millionfold. 1935Dawson & Porritt Rubber 404/1 Stretched rubber shows double refraction, i.e. a ray of light entering the rubber from air or a vacuum is split up into two rays, one of which..obeys Snell's law of refraction, whilst the other..does not unless it travels in a certain critical direction. 1974Nature 18 Jan. 156/2 Snell's law and a value of 1·67 for the refractive index of the lens were used to determine the angles of refraction at the surfaces of the lens. |