The velocity of electromagnetic radiation in a medium of permittivity $straight epsilon subscript straight o$ and permeability $straight mu subscript straight o$ is given by

$square root of epsilon subscript o over mu subscript o end root$
$square root of straight mu subscript straight o straight epsilon subscript straight o end root$
$fraction numerator 1 over denominator square root of straight mu subscript straight o straight epsilon subscript straight o end root end fraction$
$square root of straight mu subscript straight o over straight epsilon subscript straight o end root$

Solution

fraction numerator 1 over denominator square root of straight mu subscript straight o straight epsilon subscript straight o end root end fraction

The velocity of electromagnetic radiation is the velocity of light (c), ie $fraction numerator 1 over denominator square root of straight mu subscript straight o straight epsilon subscript straight o end root end fraction$ where, μ_o is the permeability and is $straight epsilon subscript straight o$ the permittivity of free space.

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