In an electromagnetic wave in free space the root mean square value of the electric field is $E_{rms} = 6V/m.$ The peak value of the magnetic field is:

Question

$\begin{array}{1 1} (1) 1.41 \times 10^{-8}\;T \\ (2) 2.83 \times 10^{-8}\;T \\ (3) 0.70 \times 10^{-8}\;T\\ (4) 4.23 \times 10^{-8}\;T\end{array}$