Optics 7 Question 29

30. If ε0 and μ0 are, respectively, the electric permittivity and magnetic permeability of free space, ε and μ the corresponding quantities in a medium, the index of refraction of the medium in terms of the above parameters is

(1992,1M)

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Solution:

  1. Speed of light in vacuum, c=1ε0μ0 and speed of light in medium, v=1εμ

Therefore, refractive index of the medium is

μ=cv=1/ε0μ01/εμ=εμε0μ0



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