Question: An electromagnetic wave has a magnetic field given by B ( x , t ) = ( 8 . 2 5 1 0 9 T

An electromagnetic wave has a magnetic field given by B(x,t)=(8.25109T)j^cos[(1.38104rad/m)x+t]
In which direction is the wave traveling?
+x-direction
-x-direction
+y-direction
What is the frequency ff of the wave?

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