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If the amplitude of the magnetic field in a travelling plane electromagnetic wave is $2.2 \times 10^{-4} \mathrm{~T}$, then the intensity of the wave is nearly
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Verified Answer
The correct answer is:
$5.8 \times 106 \mathrm{Wm}^{-2}$
$I=\frac{B_0^2 C}{2 \mu_0}=\frac{\left(2.2 \times 10^{-4}\right)^2 \times 3 \times 10^8}{2 \times 4 \pi \times 10^{-7}}$
$=5.8 \times 10^6 \mathrm{Wm}^{-2}$
$=5.8 \times 10^6 \mathrm{Wm}^{-2}$
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