(physics) The turning or bending of any wave, such as a light or sound wave, when it passes from one medium into another of different optical density.
Birefringência
(physics) the splitting of a ray of light into two parallel rays of perpendicular polarization by passage through an optically anisotropic medium.
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Mostrar mensagens com a etiqueta #Física. Mostrar todas as mensagens
segunda-feira, 9 de setembro de 2013
segunda-feira, 26 de agosto de 2013
Refractive index
In optics the refractive index or index of refraction n of a substance (optical medium) is a dimensionless number that describes how light, or any other radiation, propagates through that medium.
It is defined as n=c/v where c is the speed of light in vacuum and v is the speed of light in the substance.
For example, the refractive index of water is 1.33, meaning that light travels 1.33 times slower in water than it does in vacuum.
It is defined as n=c/v where c is the speed of light in vacuum and v is the speed of light in the substance.
For example, the refractive index of water is 1.33, meaning that light travels 1.33 times slower in water than it does in vacuum.
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