Refraction - Key Terms

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Angle of incidence in the denser medium when angle of refraction is 90º in the rarer medium
The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant
Sine of the angle of incidence ÷ Sine of the angle of refraction
Thin transparent rod through which light can travel by total internal refraction
When a light travelling from a denser to a rarer medium with an angle of incidence greater than the critical angle, it is reflected back into the denser medium