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# Can anyone explain me about refractive index?

Posted on June 10,2016, 07.06 pm

Can anyone explain me about refractive index? Started By Rohini D, Updated 6 years ago
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"The refractive index of the rays of sunlight allows us to see the different colors in a rainbow after the rain. " miruthula sri
11 Jun 2016
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"Hai , this is nothing but , Refractive index, also called index of refraction,measure of the bending of a ray of light when passing from one medium into another. If i is the angle of incidence of a ray in vacuum (angle between the incoming ray and the perpendicular to the surface of a medium, called the normal) and r is the angle of refraction (angle between the ray in the medium and the normal), the refractive index n is defined as the ratio of the sine of the angle of incidence to the sine of the angle of refraction; i.e., n = sin i / sin r. Refractive index is also equal to the velocity of light c of a given wavelength in empty space divided by its velocity v in a substance, or n = c/v." Aarthi Sri
11 Jun 2016
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"Hai Friend, In optics, the refractive index or index of refraction n of a material is a dimensionless number that describes how light propagates through that medium. It is defined as, n = \frac{c}{v}, where c is the speed of light in vacuum and v is the phase velocity of light in the medium." 11 Jun 2016
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