If a wave with \(\vec{E}=10 e^{j\left(10^{9} t-\beta y\right)} \hat{a}_{z}\) V/m is travelling in the free space, then the magnetic field intensity (in A/m) is _________
1
\(\vec{H}=\frac{1}{10 \pi} e^{j\left(10^{\theta} t+\beta y\right)}\left(\hat{a}_{x}\right)\)
2
\(\vec{H}=\frac{1}{12 \pi} e^{j\left(10^{9} t-\beta y\right)}\left(-\hat{a}_{x}\right)\)
3
\(\vec{H}=-\frac{1}{10 \pi} e^{j\left(10^{9} t+\beta y\right)}\left(\hat{a}_{x}\right)\)
4
\(\vec{H}=\frac{1}{12 \pi} e^{j\left(10^{9} t-\beta y\right)}\left(\hat{a}_{x}\right)\)