# How to get electromagnetic wave from transmitted power?

If a question states that a transmitter emits 90W power, is it meant as average power density or Poynting vector magnitude?

Is it somehow possible to deduce E(z;t) and H(z;t) from it?

Electric field equation is the following: $E = E_0\mathbf x e^{-j\beta}e^{j\omega t}$

Magnetic field would be same as above except for the magnitude divided by impedance of 377

So in general if I know what kind of power it is - avg power density or instantaneous magnitude, i would be able to work backwards and get the field vectors.

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