2006-10-17 07:40:29 · 3 answers · asked by All.your.answers 2 in Science & Mathematics ➔ Chemistry
Why does it stop glowing after sometime and then when you put it in light for sometime it glows in the dark again? (e.g. flour. toys for kids)
2006-10-17 16:49:18 · update #1
The radiation given off by the radium ionizes the air around the radium sample. The e- jumping levels in the air give the energy back in the form of visible light (in the blue range).
2006-10-17 09:12:02 · answer #1 · answered by physandchemteach 7 · 1⤊ 0⤋
Old people round here say that too, but I prefer milk chocolate. Besides, it makes you fat. I do believe that some of the other foods mentioned, work, like eg eating kiwis and such. Bye !
2016-03-17 04:57:19 · answer #2 · answered by Anonymous · 0⤊ 0⤋
same way fluorescent light bulbs work. the radiating energy given off jumps down energy levels and that energy is given off as light and heat
2006-10-17 11:28:03 · answer #3 · answered by shiara_blade 6 · 0⤊ 0⤋