Snell's lawn.

Brit.

/ˈsnɛlz lɔː/, U.S.

/ˈsnɛlz ˌlɔ/,

/ˈsnɛlz ˌlɑ/

Etymology: < the name of Willebrord van Roijen Snell (1591–1626), Dutch astronomer and mathematician, who formulated the law in 1621.

Optics.

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.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > light > refraction > [noun] > law or condition

Snell's law1873

Herschel condition1910

1873 J. Tyndall Six Lect. 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.

1935 Dawson & 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.

1974 Nature 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.

This entry has not yet been fully updated (first published 1986; most recently modified version published online March 2022).

单词	snells law
释义	Snell's lawn. Brit. /ˈsnɛlz lɔː/, U.S. /ˈsnɛlz ˌlɔ/, /ˈsnɛlz ˌlɑ/ Etymology: < the name of Willebrord van Roijen Snell (1591–1626), Dutch astronomer and mathematician, who formulated the law in 1621. Optics. 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. ΘΚΠ the world > matter > physics > electromagnetic radiation > light > refraction > [noun] > law or condition Snell's law1873 Herschel condition1910 1873 J. Tyndall Six Lect. 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. 1935 Dawson & 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. 1974 Nature 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. This entry has not yet been fully updated (first published 1986; most recently modified version published online March 2022). < n.1873
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