Velation Electrons can be excited to any energy level and can drop to any lower energy level. When electrons drop from a higher energy level to energy level n=2, visible light is emitted. When electrons drop from a higher energy level to energy level n=1, ultraviolet light is emitted. When electrons drop from a higher energy level to energy level n=3, infrared light is emitted. Slits 0 1- Gas discharge tube containing hydrogen Prism Blue Violet Violet Hydrogen Spectrum P 434.0 nm Blue green 485.1 nm Red 656.2 nm Wavelengths - Example Energy Levels 410.0 nm 3. Draw the energy level drops correlated to the Hydrogen Spectrum lines (see above example) and label the wavelengths that correspond with the drops on the above energy levels. n=6 n=5 n=4 n=3 n=2