Refract a ray (Snell's Law)
- Author:
- Ryan Hirst
When a ray of light crosses the surface of a translucent medium of different density, its speed and direction change (it is refracted) according to Snell's Law.
NOTES:
Constants η_1, η_2 are the Indices of Refraction (IOR) of the two media.
The IOR of a substance is determined by observation. For convenience, we take IOR of air = 1.
In words, for any two given media, the ratio of sines of the two angles is a constant.
In general, two rays result. A fraction of the incident ray is reflected, and a fraction is transmitted into the new medium.
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Reflection and Refraction
1. Reflect a ray: http://www.geogebratube.org/material/show/id/111895
2. One side is reflective: http://www.geogebratube.org/material/show/id/112443
3. Lamp: http://www.geogebratube.org/material/show/id/112549
→4. Refract a ray
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