- The angle of the incoming light to the normal is theta 1, called the angle of incidence.
- The angle of the refracted ray to the normal is theta 2, called the angle of refraction.
n1 x sin(theta 1) = n2 x sin(theta 2)
n1 = refractive index of material 1
theta 1 = angle of incidence of ray of material 1
n2 = refractive index of material 2
theta 2 = angle of refraction of ray of material 2
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