The maximum magnetic field strength of an electromagnetic field is 5×10−6T. Calculate the maximum electric field strength if the wave is traveling in a medium in which the speed of the wave is 0.75c
"E=\\frac{B\\varepsilon_0\\mu_0}{\\sqrt{1-\\frac{v^2}{c^2}}}=7\\cdot 10^6~\\frac NC."
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