state law of refraction
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according to first law: normal, incident ray ,refracted ray all lie in the same plane..
according to second law:sine of angle i divided by sine of angle r is equal to constant....
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there are two laws of refraction.
1)the incident ray,the refracted ray and the normal to the surface saprataly the two media all are lie in the same plane.
2)the ratio of sine of incidence and sine of refracted angle is constant for pair of two media.
Sin I/ Sin r= constant
where constant is known as refractive index .
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