An antenna that is of half wavelength of a signal is a dipole antenna. When a signal is fed to this antenna, it should induce an electron flow. However, it is also said that this electron flow produces high concentrations of electrons on either sides of the dipole alternatively during transmission. Many literature state that it is this electron flow that creates a fluctuating magnetic field around the antenna.
I would like to now take a second example. Lets take the example of an AC light bulb being lightened by a 230V 50Hz source. The bulb is connected to the AC source through a wire. In this case, does this wire too experience the same effect of alternating concentrations of electrons on its ends? Doesn't the electrons flow continuously from one end of the souse through the light bulb back to the source without having aforementioned "concentrations" on either sides?
If so, I would like to know how the former scenario happens especially in the case of antennas and not for the second scenario.
source I studied : https://www.youtube.com/watch?v=7bDyA5t1ldU