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noun Optics.
the law that, for a ray incident on the interface of two media, the sine of the angle of incidence times the index of refraction of the first medium is equal to the sine of the angle of refraction times the index of refraction of the second medium.
Origin:
named after Willebrod Snell van Royen (died 1626), Dutch mathematician
named after Willebrod Snell van Royen (died 1626), Dutch mathematician
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Snell's law
is always a great word to know.
So is flibbertigibbet. Does it mean:
| a chattering or flighty, light-headed person. |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
Collins
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Encyclopedia Britannica
Encyclopedia
Snell's law
in optics, a relationship between the path taken by a ray of light in crossing the boundary or surface of separation between two contacting substances and the refractive index (q.v.) of each. This law was discovered in 1621 by the Dutch astronomer and mathematician Willebrord van Roijen Snell (1580-1626; also called Snellius). The account of Snell's law went unpublished until its mention by Christiaan Huygens in his treatise on light.
Learn more about Snell's law with a free trial on Britannica.com.
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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