At every instant, the ratio of the magnitude of the electric field to the magnitude of the magnetic field in an electromagnetic wave equals the speed of light.
Therefore, BE=c
⇒BE=3×108
⇒B=3×108E=3×1089.6
⇒B=3.2×10−8T
Now, direction of magnetic field can be calculated as
B^=v^×E^
=i^×j^=k^
So, B=3.2×10−8k^T