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To: YORE who wrote (1008)	11/28/1997 9:02:00 PM
From: mojave	Read Replies (1) \| Respond to of 1147

Basic physics teaches us that the bending of light in water is refraction, not diffraction. Diffraction is the bending of light around obstacles in its path, such as when light confronts a small slit. In fact PNT is correct, the speed of light DOES slow a litle when it hits water. Just because C is used in Einsteins famous equation doesn't mean that the speed of light is an absolute constant.

To: YORE who wrote (1008)	11/28/1997 9:47:00 PM
From: Frederic Herman	Read Replies (1) \| Respond to of 1147

The value of the speed of light you referred to is the speed in a vacuum. Light velocity decreases in a non-vacuum media. The velocity in glass is about 2/3 the velocity in a vacuum. The index of refraction is expressed as n=c/v, where c is the velocity in a vacuum, and v is the velocity in a given medium. For glass, n= 1.5 approx.