Answer to Question #154201 in Physics for Miziika

Question #154201

The refractive index of glass is 1.5, if the velocity of light in air is 3×10^8 m/s, then calculate the velocity of light when it travels through glass


1
Expert's answer
2021-01-10T18:10:26-0500

By definition, refractive index is:


n=cvn = \dfrac{c}{v}

where c=3×108m/sc = 3\times10^8m/s is the speed of light in air, and vv is the velocity of light when it travels through glass. Since n=1.5n = 1.5, obtain:


v=cn=3×108m/s1.5=2×108m/sv = \dfrac{c}{n} = \dfrac{3\times10^8m/s}{1.5} = 2\times10^8m/s

Answer. 2×108m/s2\times10^8m/s.


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