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State two laws of refraction....

State two laws of refraction.

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(i) The incident ray, the refracted ray and the normal all lie in the same plane.
(ii) The ratio of sine of angle of incidence in the first medium to the sine of angle of refraction in the second medium is a constant and is known as refractive index of the second medium with respect to the first medium.
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OSWAAL PUBLICATION-LIGHT-REFLECTION AND REFRACTION-TOPIC -2 REFRACTION, LENSES, POWER OF LENS (SHORT ANSWER TYPE QUESTIONS I)
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