A)State the law of refraction of light that defines the refractive index of one medium with respect to the other.b)Express it mathematically also.c)Write the expression relating therefractive index of medium ̳A‘ with respect to the medium B‘ to the speed of light in the two media ̳A‘ & ̳B‘. Name the constant when medium ̳B‘ is vacuum.




the second law of refraction- the ratio of sine of angle of incidence and the sine of angle of refraction is constant for a given pair of media called as refractive index.

mathematically, sini/sinr = anb ,a constant (refractive index of medium b with respect to a)

bna = speed of light in b/speed of light in a

if b is vaccum then the constant is c(speed of light in vaccum )