The questions just says "Calculate the speed of light in:
diamond (n=2.42)
That's all it says
How do I figure it out?How to find the speed of light through a diamond?
That "n" is the refractive index of diamond
The equation for the refractive index of a material is n = c / v, where v is the speed of light through the material.
So in your case:
2.42 = c/v
v = c/2.42
v = 123,881,181 m/s
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