minus-squareOdemption@sopuli.xyzto196@lemmy.blahaj.zone•Good ol' days rulelinkfedilinkEnglisharrow-up12·1 month agoThe ring was a miniature spinthariscope. When removing the red cap in a dark room, you could peer into a tiny viewing chamber and see flashes of light caused by alpha particles hitting a zing sulfide screen. linkfedilink
minus-squareOdemption@sopuli.xyzto196@lemmy.blahaj.zone•Deutsche Herrschaftlinkfedilinkarrow-up3·2 years agoGesucht linkfedilink
The ring was a miniature spinthariscope.
When removing the red cap in a dark room, you could peer into a tiny viewing chamber and see flashes of light caused by alpha particles hitting a zing sulfide screen.