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What is refraction and its laws

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What is refraction and its laws

Posted by Uday Mann 6 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Yogita Ingle 6 years, 5 months ago

Refraction is due to change in the speed of light as it enters from one transparent medium to another.
Experiments show that refraction of light occurs according to certain laws.
So Laws of refraction of light are
The incident ray, the refracted ray and the normal to the interface of two transparent media at the point of incidence, all lie in the same plane.
The ratio of sine of angle of incidence to the sine of angle of refraction is a constant, for the light of a given color and for the given pair of media. This law is also known as Snell's law of refraction.
If i is the angle of incidence and r is the angle of refraction then sini/sinr=constant=n .....(1)
This constant value is called the refractive index of the second medium with respect to the first.

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