Make a hydrogen electron jump between levels and see the photon.
Hydrogen energy levels
Tip: click a level to pick where the electron starts, then click another level to jump there.
Make a jump
Quick falls to level 2:
Result
Choose a jump.
Send in a photon
The electron is in level 2. Send a photon of this wavelength (nm). Does it jump up?
Hydrogen emission lines you have made (visible light)
400 nm550 nm700 nm
Fall
Color
Wavelength (nm)
Photon energy (eV)
No falls yet.
Energy of level n = -13.6 / n² eV. Photon energy = the difference between two levels. Wavelength (nm) = 1240 / energy (eV). Falls into level 1 give ultraviolet light and falls into level 3 give infrared light, so you cannot see them.