It doesn't get much better than that! I give the author great credit for
including *several* paragraphs of more than one sentence. His grasp of the
fundamentals of electron physics is remarkable.
If it's not a joke site, it's a site made by an idiot who won't get
any worthwhile customers with it. I guess there's a chance the writer
doesn't know English too well; that is English is a poor second
language, but the science seems crappy as well.