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Refraction

TermDefinition
Refraction Bending of a ray of light when travelling from on medium to another
The laws of refraction 1: The incident ray, the normal, the reflected ray and the point of incidence are all in the same plane. 2: The ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant. (Snell's Law)
The refractive index of a medium The ratio of the sine of an angle to the sine of the angle of refraction when light travels from a vacuum to that medium. (1/critical angle)
The refractive index between to media The ratio of the sine of an angle to the sine of the angle of refraction when light travels from one medium to another.
Critical angle The angle of incidence that results in an angle of refraction of 90°
Total internal reflection When the angle of incidence of a ray is greater than the critical angle and results in the ray being reflected back. (Denser to rarer medium)
Optical Fibre A transparent rod usually made of glass through which light travels by total internal reflection
Created by: JackEatonK98

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