Total Internal Reflection can be used as a way to make diamonds sparkle and information travel rapidly on light waves through a fiber optic.
|The cut of the diamond favors total internal reflection. Most rays entering the top of the diamond will internally reflect until they reach the top face of the diamond where they exit. This gives diamonds their bright sparkle. Notice in this animation that a ray entering the top doesn't exit the diamond until it reaches the top surface.|
|A fiber optic is a glass "hair" which is so thin that once
light enters one end, it can never strike the inside walls at less than the critical
angle. The light undergoes total internal reflection each time it strikes the wall.
Only when it reaches the other end is it allowed to exit the fiber.
Fiber optic cables are used to carry telephone and computer communications. Advantages over electrical wired include:
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