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The refractive index and the permiabilit...

The refractive index and the permiability of a medium are respectively 1.5 and `5xx10^-7Hm^-1`. The relative permitivity of the medium is nearly

A

25

B

15

C

81

D

6

Text Solution

Verified by Experts

The correct Answer is:
D
n `= sqrt(epsilon_(r ) mu_(r )) = sqrt((mu epsilon)/(mu_(0) epsilon_(0)))`
and v = `(c )/(n) `
`rArr " " (epsilon)/(epsilon_(0)) = (9 xx 10^(16))/(4 xx 10^(16)) xx (4 pi xx 10^(-7))/(5 xx 10^(-7)) = 5.6 = 6. `
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