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The electric field part of an electromagnetic wave in a medium is represented by

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The electric field part of an electromagnetic wave in a medium is represented by E_{x}=0;

E_{y}={2.5\frac{N}{C}}cos\left[ \left(2 \pi \times 10^{6} \frac{rad}{m} \right ) t- \left(\pi \times 10^{-2} \frac{rad}{s} \right ) x \right ]

E_{z}=0. The wave is :

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E= E_{o} Sin w (t -frac{x}{c})

E is in y-z plane

- wherein

E - Electric field at (x,t)

Eo - Electric field amplitude

w= Angular frequency

c= Speed of light in vacuum 

 

 Compare with standard equation it is travelling along +x direction 

\omega=2\pi \times 10^{6}\:and\: K=\pi \times 10^{-2}

\\f=\frac{\omega}{2\pi }=10^{6}HZ \\*\\ \lambda =\frac{2\pi }{K}=2\times 10^{2}m=200m

wave is moving along +x direction

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