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Find the relative permittivity of the medium having a refractive index of 1.6.

Option: 1

0.4


Option: 2

2.56


Option: 3

3.2


Option: 4

4.8


Answers (1)

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The refractive index is the square root of the relative permittivity. It is given by:

                        n = \sqrt{\epsilon r} 
To get \epsilon r, put n = 1.6. We get:

                        \epsilon r = n2  = 1.62 = 2.56(no unit).

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Devendra Khairwa

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