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• n  the change in direction of a propagating wave (light or sound) when passing from one medium to another
• n  the amount by which a propagating wave is bent

• Put that way, the Artaudian conception of theater sounds a trifle sadistic, and it can be comprehended only as a refraction of the European experience in the 20th century, with .
• But atmospheric refraction raises the sun's apparent position in the sky by more than one of its diameters.
• The principle at work is refraction, which is what makes a straw appear bent in a glass of water.

• deflection
• deflexion

News & Articles

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• Physicists Pursue the Perfect Lens by Bending Light the Wrong Way
  Following recent breakthroughs, researchers are laying the groundwork for a "perfect lens" that can resolve sub-wavelength features in real time, as well as a suite of other optical instruments long thought impossible. These devices sidestep old optical limits by bending rays of light the "wrong" way ? a phenomenon known as negative refraction. In addition to biological imaging, perfect lenses ...
  Aug. 12, 2013 - Wired News