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I'm supposed to find the magnetic field, the scalar electric potential and magnetic vector potential for the following electromagnetic wave:
[tex]\vec{E} = E_0 cos (kz - \omega t) \left \{ \hat{x} + \hat{y} \right \}[/tex]
Alright, the magnetic field goes as
[tex]\vec{B} = \frac{1}{c} \hat{k} \times \vec{E} [/tex]
[tex]\vec{B} = \frac{E_0}{c} cos (kz - \omega t) \left \{ \hat{z} \times \hat{x} + \hat{z} \times \hat{y} \right \} [/tex]
[tex]\vec{B} = \frac{E_0}{c} cos (kz - \omega t) \left \{ \hat{y} - \hat{x} \right \} [/tex]
I used [itex]\hat{k} = \hat{z} [/itex] since the wave seems to be traveling through the z-axis.
Now when it comes to the potentials, I'm lost. I know, for once, that I can't directly apply [itex]V = - \int \vec{E} . \vec{d \ell} [/itex] since the electric field is no longer constant.
Any hints?
[tex]\vec{E} = E_0 cos (kz - \omega t) \left \{ \hat{x} + \hat{y} \right \}[/tex]
Alright, the magnetic field goes as
[tex]\vec{B} = \frac{1}{c} \hat{k} \times \vec{E} [/tex]
[tex]\vec{B} = \frac{E_0}{c} cos (kz - \omega t) \left \{ \hat{z} \times \hat{x} + \hat{z} \times \hat{y} \right \} [/tex]
[tex]\vec{B} = \frac{E_0}{c} cos (kz - \omega t) \left \{ \hat{y} - \hat{x} \right \} [/tex]
I used [itex]\hat{k} = \hat{z} [/itex] since the wave seems to be traveling through the z-axis.
Now when it comes to the potentials, I'm lost. I know, for once, that I can't directly apply [itex]V = - \int \vec{E} . \vec{d \ell} [/itex] since the electric field is no longer constant.
Any hints?