If ϵoandμo are the electric permeability and magnetic permeability in free space ϵandμ are the corresponding quantities in a medium , then of refraction of the medium is
A
√ϵoμoϵμo
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B
√ϵϵo
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C
√ϵoμoϵμ
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D
√ϵμϵoμo
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Solution
The correct option is C√ϵμϵoμo The velocity of the electromagnetic waves in free space is given by 1√μoϵo and the velocity of the electromagnetic waves in the medium is given by V=1√μϵ Now, refractive index of the medium n=CV =1μoϵo×√μϵ1=√μϵμoϵo ∴ the correct option is (D)