# Why Does Light Refract or Bend When Going through Glass or Water?

Light refracts in water due to the passage through matters with different density. When moving from air to water, air is less dense while the water is more dense. Light then bends toward the normal.
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Q&A Related to "Why Does Light Refract or Bend When Going through..."
 Explained by the theory of Q.E.D. (Quantum electrodynamics) http://answers.yahoo.com/question/index?qid=200902...
 If light travels straight through a glass of water, it slows down. If light travels through a glass of water of an angle, the light that hits the closer edge will slow down sooner http://wiki.answers.com/Q/Why_do_light_refract_whe...
 The refraction occurs because when light hits glass or http://www.chacha.com/question/why-does-light-refr...
 3*10^5 m/sec is the speed of light in air. Speed of light changes from one medium to another. c is a constant and is the speed of light in vacuum. http://answers.yahoo.com/question/index?qid=201308...
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