The Amplitude of the Electric Field of an Electromagnetic Wave $\times$

The amplitude of the electric field of an electromagnetic wave is 6.0 $\times$ 10 ^-3 V/m. The amplitude of the magnetic field of this wave is

A) 1.8 $\times$
10⁶ T.
B) 1.8 $\times$
10^-11 T.
C) 1.8 $\times$
10^-10 T.
D) 2.0 $\times$
10^-11 T.