How to calculate the refractive index using that sin method? Share with your friends Share 1 Sagar Kumar answered this Dear Student, The refractive index n is defined as the ratio of the sine of the angle of incidence to the sine of the angle of refraction.So, n=sin isin r i is the angle of incidence of a ray in vacuum (angle between the incoming ray and the perpendicular to the surface of a medium, called the normal) and r is the angle of refraction (angle between the ray in the medium and the normal)From this formula we can calculate refractive index of a material.Regards 2 View Full Answer Linclon Singh answered this sin i/sin r = v1/v2 = n 1
