Model of Solids with Impurities
Energy Diagram of Solids
Allowed Energies
Energies with More Impurities
Summarizing Energy Bands
Exploring Light Emissions from Solids with Three Energy Bands
Energy Bands and Fluorescence
Energy Levels in Fluorescence
Bands and Colors of Tubes
Making a Black Light
Applying Fluorscence to Minimize Counterfeit Money