http://www.lunchboxcollections.com/novelty-toy/
im looking for an old novelty toy, that lets you watch atoms decay?
Its supposed to be a small container with a lens on top and a miniscule amount of some isotope that emits a photon as the element decays. when in a dark room you can watch one at a time. trouble is i cant remember what its called or where to find one, i think it was in popular science where i read about it. Looked like a really cool novelty
it's a called a spinthariscope it was invented by william crookes
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