Snell’s law of refraction

symbols, variables and units

n: dimensionless refractive index; θ: angle relative to the interface normal (rad).

applicable conditions and boundaries

Uniform isotropic medium, flat interface; total reflection needs to be determined separately.

formula source code

The following is a copyable LaTeX expression.

n_1\sin\theta_1=n_2\sin\theta_2

Reference and Extended Learning

is organized according to model definition and assumptions. Please check actual conditions and original literature before engineering, research and clinical use.