UH-OH! Get those coins in the DARK!
topstuf
Posts: 14,803 ✭✭✭✭✭
http://physics.bu.edu/~duffy/PY106/PhotoelectricEffect.html
Look what it says: 
** If you shine light of high enough energy on to a metal, electrons will be emitted from the metal.**
YIKES!
Let's quit worrying about original surfaces. There may not BE any.
Aiyeee!
Black slabs for me!
2
Comments
Can't wait to use this excuse when I'm haggling on a price of a coin with a dealer.
"This coin has altered surfaces. It's been exposed to light for 134 years".
That article brought back memories! I have a degree in Physics...a few years ago my dad asked me to clean my stuff out of his garage and a lot of it was my old school books, notebooks etc. I looked through the notebooks and had absolutely no idea what most of it meant as it had been 25 years or so since I did any physics work. Totally greek to me....but it was my handwriting!
K