Radium Dial on Clock

Radium Dial on Clock

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Credit: Ted Kinsman/SCIENCE PHOTO LIBRARY

Caption: Glowing radium dial on an alarm clock. Manufactured in the early 1900's this clock has a highly radioactive radium paint applied to the hands and numbers. The radium combined with zinc sulphides to allow the face of the clock to continuously emit light. Once the health risks of the painted dials became known, radium was discontinued from use. The radium is a mix of several different isotopes and is a strong emitter of alpha, beta, and gamma radiation.

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Keywords: alarm clock, alpha, alpha particle, alpha radiation, antique, antiques, atomic decay, beta particle, beta radiation, clock, clock face, gamma, gamma ray, glow, half life, health hazard, health hazards, physics, radiation exposure, radioactive, radioactive paint, radium, radium clock, radium oxide, radium paint, toxic

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