The ratio of the amplitude of magnetic field to the amplitude of electric field for an electromagnetic wave propagating in vacuum is equal to

the speed of light in vacuum

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reciprocal of speed of light in vacuum

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the ratio of magnetic permeability to the electric susceptibility of vacuum

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unity

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Solution

The correct option is B reciprocal of speed of light in vacuum
The amplitude of magnetic field and electric field for an electromagnetic wave propagating in vacuum are related as
$E_{0} = B_{0} c$
where, $c$ = speed of light in vacuum.
$∴$ $B_{0} / E_{0}$ = $1 / c$

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