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interesting thread about luminova
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13-01-2014 9:11pm#1
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Moderators, Science, Health & Environment Moderators, Society & Culture Moderators Posts: 60,217 Mod ✭✭✭✭
Join Date:Posts: 59144
Being of the vintage persuasion I've found it fades alright. Not by much, but you can see it. Though on the point raised about radium destroying the phosphors, it does seem to depend on the application. EG I've a pair of cockpit instruments from a JU87(Stuka) dive bomber from circa 1940 and they still glow.
The altimeter on the left is quite bright in the dark. Given the globs of radium involved I keep it at a discrete distance at all times... :eek:Rejoice in the awareness of feeling stupid, for that’s how you end up learning new things. If you’re not aware you’re stupid, you probably are.
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Being of the vintage persuasion I've found it fades alright. Not by much, but you can see it. Though on the point raised about radium destroying the phosphors, it does seem to depend on the application. EG I've a pair of cockpit instruments from a JU87(Stuka) dive bomber from circa 1940 and they still glow.
The altimeter on the left is quite bright in the dark. Given the globs of radium involved I keep it at a discrete distance at all times... :eek:
radium emits gamma radiation?0 -
Moderators, Science, Health & Environment Moderators, Society & Culture Moderators Posts: 60,217 Mod ✭✭✭✭ Join Date:Posts: 59144
Long garden, concrete shed. I've had a geiger counter on them. They are strong emitters(mostly alpha) at the glass, but this drops off rapidly, so by the time you're at six feet away it's mostly background. To think that back in the day radium was everywhere, on watches, clocks, even things like light switches. You could even buy paint to luminise whatever you wanted.
People even drank it
Some strange uses...
Even stranger... Atomic Viagra!:eek:
The Radium girls trials stopped all that. Well reduced all that. Some of the women who hand painted watch and clock dials and hands started to come down with bone decay and cancers. They were taught to point the hairs of their brushes with their lips so took in huge doses. Some would paint their own teeth in the stuff as a fashion thing. Even though quite the number were affected, what's surprising is how many seemingly weren't.
With a watch dial the danger is not so much to the wearer, though they do get a rad dose, the real danger is if they, or more likely the watchmaker opens the case. Then the tiny particles of radium laced dust is in real danger of being breathed in. NOT good.Rejoice in the awareness of feeling stupid, for that’s how you end up learning new things. If you’re not aware you’re stupid, you probably are.
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