Question

If the speed of light through material Z is
2.5×10^8 m/s, what is this material’s index of
refraction? The speed of light in a vacuum is
3 × 10^8 m/s.
n=c/v

where
n =the index of refraction
c =the speed of light in vacuum
v =the speed of light in a medium

find n

http://physics.info/refraction/
(3x10^8)/x = 2.5 x 10^8

x= 1.2

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