I recently posted a video showing off the peculiar effect of light being transmitted through 2 mediums without refraction which makes it impossible to distinguish between the mediums resulting in an object becoming invisible. http://wondreal.blogspot.be/2011/09/magic-of-reality.html
Here we see another beautiful effect, total internal reflection, which is used to transmit information in fiber optic cables.
An optical fiber is a flexible, transparent fiber made of very pure glass not much wider than a human hair that acts as a waveguide to transmit light between the two ends of the fiber.
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