For a particular electromagnetic plane wave, the electric field's amplitude is 0.54 V/m. What is the magnetic field's amplitude?

Question

Quizplus · Accepted Answer

The ratio of the amplitude of the electric field to the amplitude of the magnetic field in a plane wave is given by the wave impedance, which is approximately equal to the vacuum impedance of 377 ohms. Therefore, the amplitude of the magnetic field can be calculated by dividing the amplitude of the electric field by the wave impedance:

B = E/Z = (0.54 V/m) / 377 ohms

Using SI prefixes, this simplifies to:

B = 1.8 x 10^-9 T

For a Particular Electromagnetic Plane Wave, the Electric Field's Amplitude