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Refractive index - Wikipedia
In optics, the refractive index or index of refraction of a material is a dimensionless number that describes how light propagates through that medium. It is defined as =, where c is the speed of light in vacuum and v is the phase velocity of light in the medium. For example, the refractive index of water is 1.333, meaning that light travels 1.333 times faster in vacuum than in the water....
Last update Tue, 31 Jul 2018 07:13:00 GMT Read More
Refraction – The Physics Hypertextbook
The index of refraction is somewhat related to density, as one would expect. This graph is for transparent minerals. Someone should make one for liquids and see what happens....
Last update Mon, 30 Jul 2018 07:14:00 GMT Read More
The Critical Angle - The Physics Classroom
Use the Find the Critical Angle widget below to investigate the effect of the indices of refraction upon the critical angle. Simply enter the index of refraction values; then click the Calculate button to view the result. Use the widget as a practice tool. Check Your Understanding. 1. Suppose that the angle of incidence of a laser beam in water and heading towards air is adjusted to 50-degrees....
Last update Fri, 10 Aug 2018 16:34:00 GMT Read More
BBC - Higher Bitesize Physics - Refraction of light : Revision
A BBC Bitesize secondary school revision resource for Higher Physics on radiation: refraction of light, critical angle, refractive index....
Last update Fri, 10 Aug 2018 06:33:00 GMT Read More