The ratio of amplitude of magnetic field to the amplitude of electric field for an electromagnetic wave…
The ratio of 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
reciprocal of speed of light in vacuum
the ratio of magnetic permeability to the electric susceptibility of vacuum
unity
Solution
As $E=c B$
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.