Band Theory of Solids. A useful way to visualize the difference between conductors, insulators and semiconductors is to plot the available energies for electrons in the materials. Instead of having discrete energies as in the case of free atoms, the available energy states form bands.
[MEDIA] Sigh, Popee the Performer. Where do I begin? Popee the Performer is a CGI kids anime created by Ryuji Masuda, who hasn't really created...
Pictures: Made In Connecticut, Past & Present. 1  The Pope Manufacturing Co. was founded in 1877 by Albert Augustus Pope and made bicycles under the Columbia brand name in Hartford -- beginning with the Columbia High Wheeler in 1878 -- as well as motorcycles and even the electric car in 1897.