Calculate critical angle given refractive index. As in reflection we measure the angles from the normal to the surface at the point of contact. Working the numbers youll see that in your case the incident side is usually denoted the n1 side that the angle between the normal and the ray will be greater than the angle between the incident ray and the normal.
Displaystyle k_ x text Region_ 1k_ x text Region_ 2 n 1 k 0 sin th 1 n 2 k 0 sin th 2.
If the angle of incidence is 25 and angle of refraction is 32 find the refractive index of the media. Tables of refractive indices for many substances have been compiled. Th i the angle of incidence. Angle of transimission in radian.