Here, B0=3×10−7T Amplitude of electric field, E0‌=B0c ‌=3×10−7×3×108 ⇒‌‌E0‌=90Vm−1 From the given equation of B, it is clear that EM wave is travelling along negative direction of X - axis i.e. ∴ If
^
n
be the unit vector along the direction of electric field, then