The ratio of amplitude of magnetic field to the amplitude of...

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

Options

Athe speed of light in vacuum
Breciprocal of speed of light in vacuum
Cthe ratio of magnetic permeability to the electric susceptibility of vacuum
Dunity

Correct answer

B. reciprocal of speed of light in vacuum

Step-by-step solution

E=c B

So required ratio

\frac{E}{B}=c\frac{B}{E}=\frac{1}{c}

Therefore, the ratio of amplitude of magnetic field to the amplitude of electric field for an electromagnetic wave propagating in vacuum is equal to reciprocal of speed of light.

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