what is mean by refractive index
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The ratio of the speed of light in air or vacuum to that in another medium is known as refractive index of that substance
kailashsharma:
Right
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ratio of velocity of light in vaccum to velocity of light in a specific medium
Snell's law= the sine of angle of i divided by the sine of angle of r is always a constant and refractive index of the medium
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