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Refraction
| Term | Definition |
|---|---|
| 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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