Posted by paige on Wednesday, April 14, 2010 at 10:24pm.
Using the formula n=c/v where n is the refractive index of a material, c is the speed of light and v is the speed of light within the material, you can manipulate the above formula to v=c/n to find the speed within the material.
*Thats the theory anyways, I see here that your index of refraction is huge, normally the index of fraction is a little above one. A perfect vacum would be 1.00, water is 1.33. A material has an index of refraction of 1.76E7 will slow light down to a very, very slow pace, then again, its a super dense material...*
There are indeed exotic materials (at near-absolute zero temperature) that slow light that much, but they are not "super dense". They are called Bose-Einstein condensates.
They are described in
http://www.nist.gov/public_affairs/releases/BEC_background.htm
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