The xxx:
I once had such a joke. I went into the faculty smoker (I was then a student) talk about good and bad TVs. In the course of the conversation sharpened on the theme of the difference of colors on the edges of the screen. Someone asked why this happened. And here I broke...
The main thing was to convince this cotton that electrons are three colors - red, blue and green. Well, I sold it to him, said "Yes, you know it without me", he sneezed. And then everything was simple.
“Wonderful,” I said and put him another chip about E=mC^2 and E=hν. He twisted these formulas before his nose and, like “two times two,” proved that the blue electrons are the heaviest, the green somewhat lighter, and the red ones the lightest. He nodded again.
Then I applied the Lawrence rule for profitable purposes and proved to him that blue electrons are less deviated by the magnetic field than red ones, hence the difference of colors. In fact, he understood everything. Moreover, so much that I tried to pair this smoothie in the lab, and almost in my own words. Prepod had an unfortunate appearance, and then for a long time stumbled into one point. The proper diagnosis is selected...