X-Rays Emitted From Ordinary Scotch Tape
Maximum Prophet writes "When I was in High School, I built an X-Ray machine that (probably) didn't produce any X-Rays. I used an old vacuum tube and high voltage. Little did I know that simple triboluminescence would have enough energy to do useful work." The catch: you'll need to peel your tape in a vacuum, and have the x-ray film at the ready.
Um, X-rays don't hurt. Stupid-rays do, though. That's probably what you were feeling.
The article suggests Bremsstrahlung (note the 3rd paragraph of the linked article) of the electrons jumping from the non-sticky surface to the sticky surface of the tape - I guess the air present in a non-vacuum situation lets the electrons slow gradually or maybe have lower initial velocity - that part is unclear from the article.
...the future crusty old bastards are already drinking the Kool-Aid.