Laws of refraction.

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Answer:-
★FIRST lAW:-The incident ray, the refracted ray & the normal to the interface at the point of incidence all lie in one plane & that plane is perpendicular to the interface separating the two media.
★SECOND LAW:-The sine of the angle of incidence bears a constant ratio with the sine of the angle of refraction.
(I.e sini/sinr = constant)

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