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Speed of light

  • #1

Homework Statement



Question

Given that the speed of light in a vacuum is 3.0 x 10^8 ms^-1, calculate the speed of light in a diamond of refractive index 2.4.

Homework Equations



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3. Attempt

So if the refractive index is 2.4, which means 2.4 = sin i / sin r, how can I solve this question? Can anyone give me a helping hand?
 

Answers and Replies

  • #2
Doc Al
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You're thinking of Snell's law, but all you need is the definition of index of refraction.
 
  • #3
You're thinking of Snell's law, but all you need is the definition of index of refraction.
Thank you but, doesn't the refractive index involves Snell's law?
 
  • #4
gneill
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Thank you but, doesn't the refractive index involves Snell's law?
The other way around, actually. :tongue: Snell's law involves the refractive indexes of the materials.

Look up the definition of refractive index!
 
  • #5
Doc Al
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Last edited by a moderator:

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