Radium Clock
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Tesladownunder
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Registered Member #10
Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424
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I have a radium watch dial. The phosphor is only barely visible after 70 years but the radioactivity is stilll going strong on my geiger counter. My nuclear page is here I doubt that 100kV is needed for an electroscope (a 5 inch spark would jump from that). At least 1-2 orders of magnitude less would seem more reasonable to me.
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