A plane electromagnetic wave of frequency 50 MHz travels in free space along the positive x−direction. At a particular point in space and time, E=6.3 j Vm⁻¹. The corresponding magnetic field B, at that point will be:
A. 2.1×10⁻⁸ k T
B. 6.3×10⁻⁸ k T
C. 18.9×10⁻⁸ k T
D. 18.9×10⁻⁸ k T