Question

Absolute refractive index of medium A is 1.3 while that of medium B is 2.4.In which of

these medium light propagate with lower speed? Give reason.​

Answer 1

$refractive \: index = \frac{speed \: of \: light \: in \: vaccum}{speed \: of \: light \: in \: medium}$

here, we can se refractive index is inversaly propotional to speed of light in medium...

so, maximum the refraction index minimum the speed of light in medium.......

here,

refractive index of A is 1.3 and B is 2.4

as we can see the refractive index of B is more

therefore, speed of light in medium B is less..........