Subject: What causes luminous watch dials to glow in the dark?
Date: Sat Oct 31 01:59:02 1998
Posted by Frank Ermes
Grade level: nonaligned
City: Melbourne State/Province: Victoria
Area of science: Physics
Is it via the emission of alpha particles that "tunnel" past the
surrounding electron cloud? And if so, how can exposing these dials to
ordinary light (i.e. photons) stimulate them to glow? Wouldn't the
incoming photons be absorbed by the electron cloud?
Re: What causes luminous watch dials to glow in the dark?
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