Optics Refractive Index of a Medium (m)
It is the ratio of sine of the angle of incidence to the sine of angle of refraction.
Salient Points
· Greater the refractive index of a medium, smaller is the velocity of light in it.
· Smaller the refractive index of a medium, greater is the velocity of light in it.
· A medium with higher value of refractive index is called optical denser medium.
· A medium with lower value of refractive index is called optical rarer medium.
· (Refractive Index)medium = (Absolute Refractive Index)medium
Refraction through a prism
