Wow, very useful. Unfortunately i get here by very specific coincidents so no doubts its have a not such much views. But i hope owners of this channel not running to idea "get more views", because as part of world wide community agreement of transfering knowlege and information to all people independently of their wealth its absolutely beautiful and perfect. Thanks for teaching me something new, Paul Corkum

At about 9:55: 1keV corresponds to about 1 nm wavelength, not 0.1A. 100x off...