How Does the Index of Refraction Affect Light Speed in Different Materials?

AI Thread Summary
The discussion focuses on the relationship between the index of refraction and the speed of light in different materials. The index of refraction for table salt is given as 1.54, leading to the calculation of light speed in salt using the formula n=c/v. A user initially struggles but eventually solves the problem. The conversation then shifts to a new question regarding the angle of refraction for light passing from diamond, which has an index of refraction of 2.42, into air, with an angle of incidence of 25 degrees. Participants express confusion about how to approach this new problem.
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Speed of light. I NEED HELP! PLEASE!

Homework Statement



The index of refraction of table salt is 1.54 . What is the speed of light in table salt?

Homework Equations





The Attempt at a Solution



I NEED HELP!
 
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Can you post the forumal for index of refraction?
 
n=c/v. there is the formula
 
So what is stopping you from getting the speed of light in salt?
 
yah, i just figured it out. I didn't think it would be that easy to solve. ha ha
 
new question though...

ok, so diamond has an index of refraction of 2.42. Suppose that a rectangular block of diamond is immersed in a tank of water and that a ray of light is passing through the dimaond makes an angle of incidence of 25 degrees in the diamond. What is the angle of refraction with the normal in the air?

How do I even start?
 
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