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

Options

A. the speed of light in vacuum
B. reciprocal of speed of light in vacuum
C. the ratio of magnetic permeability to the electric susceptibility of vacuum
D. unity

Answer

B

Explanation

The amplitudes of electric field and magnetic field for an electromagnetic wave propagating in vacuum are related as `E_(0)=B_(0)c`
where c is the speed of light in vacuum.
`therefore" "(B_(0))/(E_(0))=(1)/(c)`