The ratio of amplitude of magnetic field to the amplitude of electric field for an electromagnetic wave propagating in vacuum is equal to
A. the speed of light in vacuum
B. reciprocal of the speed of light in vacuum
C. the ratio of magnetic permeability to electric susceptibility in vacuum
D. unity
Answer:B
The ratio of amplitude of magnetic field to the amplitude of electric field for an electromagnetic wave propagating in vacuum is equal to
A. the speed of light in vacuum B. reciprocal of the speed of light in vacuum C. the ratio of magnetic permeability to electric susceptibility in vacuum D. unity