Question
The maximum value of electric field vector $\overrightarrow{ E }$ in a electromagnetic wave is 0.3 mV metre$^{-1}$. Calculate the maximum value of magnetic field vector $\overrightarrow{ B }$.
✓
Answer
Here $E_{0}=0.3\times10^{-3}V~m^{-1}$
∴ $\frac{E_{0}}{B_{0}}=c\Rightarrow B_{0}=\frac{E_{0}}{c}=\frac{0.3\times10^{-3}Vm^{-1}}{3\times10^{8}ms^{-1}}$
$=1.0\times10^{-12}$ Tesla
∴ $\frac{E_{0}}{B_{0}}=c\Rightarrow B_{0}=\frac{E_{0}}{c}=\frac{0.3\times10^{-3}Vm^{-1}}{3\times10^{8}ms^{-1}}$
$=1.0\times10^{-12}$ Tesla
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