The maximum magnetic field strength is 6.22 × 10⁻⁴ T. The result is obtained by dividing the maximum electric field strength by the speed of the wave.
The ratio of electric field strength to magnetic field strength in any electromagnetic wave is equal to the speed of light.
E/B = c
Where
If the speed of the medium wave is 0.75c and the maximum electric field strength is 140 kV/m. The maximum electric field strength would be
B = E/0.75c
B = 140.000/0.75c
B = 140.000/(0.75 × 3 × 10⁸)
B = 14×10⁻⁴/2.25
B = 6.22 × 10⁻⁴ T
Hence, the maximum electric field strength in the electromagnetic wave is 6.22 × 10⁻⁴ T.
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