Snell's law

S5554925 (snĕlz)n. A law describing the refraction of a ray of light at the surface between two media, such that the product of the refractive index of the first medium and the sine of the angle of incidence equals the product of the refractive index of the second medium and the sine of the angle of refraction.

[After Willebrord Snel van Royen (1580-1626), also called Willebrord Snellius, Dutch astronomer and mathematician who formulated the law.]

Snell's law

(snɛlz) n (General Physics) physics the principle that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant when a light ray passes from one medium to another[C17: named after Willebrord Snell (1591–1626), Dutch physicist]

Snell's law

Snell's law:

see refractionrefraction,
in physics, deflection of a wave on passing obliquely from one transparent medium into a second medium in which its speed is different, as the passage of a light ray from air into glass.
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Snell’s Law

a law governing the refraction of a beam of light at the boundary between two transparent media. It asserts that the ratio sin α /sin β is constant for the same two media; here, α is the angle of incidence of the beam on the boundary, and β is the angle of refraction.

The law was established by W. Snell around 1620 and by R. Descartes in 1637. The discovery of Snell’s law permitted the completion of the foundations of geometrical optics and made possible the formulation of Fermat’s principle. The law provided the basis for the introduction of the concept of the refractive index of a medium. In terms of refractive indexes, Snell’s law can be written in the form sin α/sin β = n₂/n₁ where n₁ and n₂ are the refractive indexes of the first and second media, respectively, through which the light travels. (See alsoREFRACTION OF LIGHT.)

单词	snell's law
释义	Snell's law Snell's law S5554925 (snĕlz)n. A law describing the refraction of a ray of light at the surface between two media, such that the product of the refractive index of the first medium and the sine of the angle of incidence equals the product of the refractive index of the second medium and the sine of the angle of refraction. [After Willebrord Snel van Royen (1580-1626), also called Willebrord Snellius, Dutch astronomer and mathematician who formulated the law.] Snell's law (snɛlz) n (General Physics) physics the principle that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant when a light ray passes from one medium to another[C17: named after Willebrord Snell (1591–1626), Dutch physicist] Snell's law Snell's law: see refractionrefraction, in physics, deflection of a wave on passing obliquely from one transparent medium into a second medium in which its speed is different, as the passage of a light ray from air into glass. ..... Click the link for more information. . Snell’s Law a law governing the refraction of a beam of light at the boundary between two transparent media. It asserts that the ratio sin α /sin β is constant for the same two media; here, α is the angle of incidence of the beam on the boundary, and β is the angle of refraction. The law was established by W. Snell around 1620 and by R. Descartes in 1637. The discovery of Snell’s law permitted the completion of the foundations of geometrical optics and made possible the formulation of Fermat’s principle. The law provided the basis for the introduction of the concept of the refractive index of a medium. In terms of refractive indexes, Snell’s law can be written in the form sin α/sin β = n₂/n₁ where n₁ and n₂ are the refractive indexes of the first and second media, respectively, through which the light travels. (See alsoREFRACTION OF LIGHT.) MedicalSeerefraction
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