Trouble understanding band theory

[PhysicsBegner]

Hi, I have porblem in visualizing or imagining the formation conduction and valance band in basic semiconductor physics. Most of the books explains as ' when millions of atom combine together the outermost shell and subshells gets altered and form more energy levels for electrons to occupy. and as a result of this continuous band of energy level are formed for electrons to flow.

After this explanation two rectangles are shown with gap to represent the valance and conduction band. But i could hardly imagine how this would happen. Is there any vedio animating this process?

 

[azntoon]

Unfortunately I can't find a video animation of this process. However, there are some good diagrams and illustrations available online that may help to visualize it. You can also try searching for videos related to band theory, which may provide a better visual representation of how electrons move in a semiconductor.