Hi! I would like to know if there is any direct experimental evidence of the electron distribution inside of the hydrogen atom. In the Wikipedia article http://en.wikipedia.org/wiki/Hydrogen_atom" you can see the solutions of the Schrödinger equation and the graphical representations of the wave function - but is there any way to verify those electron distributions through experiment? I don't mean the energy levels of the different states - those can be verified through spectroscopy of hydrogen gas, but that only gives the energy differences, and tells me nothing about the spatial distribution of the electrons. Thanks in advance, Sebastian.