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State Snell 's law of refraction, express refractive index of a medium as mathematical formula and state the condition for Snell 's law to be valid.



The ratio of sine of angle of incidence to the sine of angle of refraction is a constant for the light of a given colour and for the given pair of media...... this law is known as SNELL'S LAW......
if i is the angle of incidence and r is the angle of refraction, then,
sin i/sin r = constant
This constant value is called the refractive index of the second medium with respect to the first.
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mark as best pls....
wow great u are genious
thanks..... but that was a simple question.. can u pls mark as brainliest?
no m sorry :-)
okk,, i know that u cant mark........ i asked this to mr. G4ilasingh....
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