Question

reading of v1 =13 degree 45'30" and V2=134degree12'15" find angle of prism theta​

Answer 1

If 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), the refractive index n is defined as the ratio of the sine of the angle