The electric and the magnetic field,associate | vedclass

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Question

(A) The direction of propagation of an electromagnetic wave is given by the direction of the Poynting vector,which is $\vec E 	imes \vec B$.Given tha

Vedclass · Accepted Answer

$\vec E = {E_0}\hat i, \vec B = {B_0}\hat j$

Vedclass · Answer

(A) The direction of propagation of an electromagnetic wave is given by the direction of the Poynting vector,which is $\vec E 	imes \vec B$.Given that the wave propagates along the $+z-$ axis (unit vector $\hat k$),we must have $\hat E 	imes \hat B = \hat k$.Testing option $A$: $\hat i 	imes \hat j = \hat k$. This satisfies the condition.Therefore,the electric field is along the $x-$ axis and the magnetic field is along the $y-$ axis.

The electric and the magnetic field,associated with an $e.m.$ wave,propagating along the $+z-$ axis,can be represented by

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