The amplitude of magnetic field in an electromagnetic wave propagating along y-axis is 6.0 × 10–7 T. The maximum value of electric field in the electromagnetic wave is
E = CB
= 3 × 108 × 6 × 10–7
= 180 V/m
In electromagnetic waves, the electric field (E) and magnetic field (B) are perpendicular to each other and to the direction of propagation. Their amplitudes are related by the speed of light in vacuum (c).
Amplitude of magnetic field B0 =
Speed of light c =
The maximum electric field E0 is related to the maximum magnetic field B0 by:
The maximum value of electric field is
Electric and magnetic field relationship:
Speed of light:
Energy density: