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VS. QUARTZ WATCH DIALS
In a darkened room, use a strong hand lens to look closely at a radioactive (quartz?) watch dial -- you will see tiny flashes of light. (This writer does not believe that quartz is radioactive, but the quartz hands on my clock do glow in the dark.) Now place the watch under a low-power microscope, and observe the dial again.
The radioactive atoms (radium) on the watch break apart and each flash represents a collision between an atomic particle and the coating material on the watch. (This writer does not know if the quartz on watch dials works the same or not.)
You might be interested in researching the work of Marie Curie (1867-1934), a French chemist who studied radioactive elements such as radium and strontium.
It may also
be of interest to know that not very many years ago, the hands (and sometimes
the numerals) on watches were painted with radium so that they would be
visible in the
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