CBSE Class 10 Science 2019 · Paper 31/1/3/C · Question 5(a)
State two laws on the basis of which the refraction of light occurs.
Answer
The incident ray, refracted ray and normal lie in one plane; is constant (Snell's law).
(i) The incident ray, the refracted ray and the normal to the interface of the two transparent media at the point of incidence all lie in the same plane.
(ii) The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant for light of a given colour and for a given pair of media: (Snell's law of refraction). This constant is the refractive index of the second medium with respect to the first.
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