Given magnetic field, B=1.6×10−6cos(2×107z+6×1015t)(2i^+j^)m2Wb
The relation between magnetic field and electric field is E=cB=(3×108)×(1.6×10−6×5)=4.8×102×5
The direction of light propagation will be along E×B .
E=4.8×102cos(2×107z+6×1015t)(−i^+2j^)mV