Question $2$

$10$ pts

A planar electromagnetic wave is propagating in the $-x$ direction. At a certain point $P$ and at a given instant, the electric field of the wave is given by $E=(4\mathrm{.}74\frac{V}{m})hat().$ What is the magnitude and direction of the magnetic field vector of the wave $($in nT $)$ at the point $P$ at that instant? Denote the $+z$ direction as positive, and the $-$z direction as negative. $($Use $c=2\mathrm{.}9979{10}^8\frac{m}{s})$

$$ nT

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