If ray travelling in air is incident on a trans... - JAMB Physics 2001 Question

Snell's law states that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is equal to the refractive index of the medium.

Here's the breakdown:

1. Angle of incidence (α): The angle between the incident ray and the normal.
2. Angle of refraction (β): The angle between the refracted ray and the normal.
3. Refractive index (n): n = sin(α) / sin(β)