Snell's Laws Of Refraction
Advertisements
Description:
The relation between the angle of incidence and the angle of refraction is given by Snell’s law which as stated as follows −
The incident ray and the refracted ray are on the opposite sides of the normal at the point of incidence and all three lie in the same plane.
In refraction, the ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant. This constant is called refractive index of second medium with respect to first medium. and it is given by −
1μ2 =
sin isin r
sin i1sin r1
= sin i2sin r2
= sin i3sin r3
= 1μ2As we know that refractive index of a medium is determined by the velocities −
1μ2 =
v1v2
∴ =
sin isin r
= v1v2
= 1μ2Advertisements