4 ms·

Ya, there are lots of "radioactive" glowing things safely used every day. But people get scared when things glow green because Hollywood tells them to fear glo

• Arainach 1y ago
  To be fair Tritium's half-life is significantly less than radium. You really don't want to be breathing any radium dust if you can at all avoid it, which is a good reason we stopped putting it in things. But if it's in a sealed container (like a watch that isn't smashed/cracked up) surrounded by a few millimeters of material it's not going to be a big deal even if it's on your wrist for years.
  • sandworm101 1y ago
    And it is a metal watch. On the user's wrist. I wouldnt sleep with the dial under my toungue, but at literal arm's length it would be fine.