Question

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.

Answer 1

when light goes any rare medium to denser medium it deviated from its path towards normal and with denser to rare medium it deviated away from normal.
angle of incidence>angle of rerection in first case and angle of incidence<angle of refrection in second case and n=c/v .light travel fastest in the vaccum