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Q.4 State the law of refraction of light that defines the refractive index of a medium with respect to the other. Express it mathematically.
How is refractive index of any medium 'A' with respect to a medium 'B' related to the speed of propagation of light in two media A and B?
State the name of this constant when one medium is vacuum or air. The refractive indices of glass and water with respect to vacuum
are 3/2 and 4/3 respectively. If the speed of light in glass is 2 x 108 m/s, find the speed of light in (vacuum (ii) water.
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First law of refraction also known as Snell's law defines the refractive index of a medium with respect to the other medium. First law of refraction states that, the ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant. This is known as Snell's law.
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