A certain watch's luminous glow is due to zinc sulfide paint that is energized by beta particles
Question:
A certain watch's luminous glow is due to zinc sulfide paint that is energized by beta particles given off by tritium, the radioactive hydrogen isotope 3H, which has a half-life of 12.3 years. This glow has about 1/10 of its initial brightness. How many years old is the watch?
A. 20 yr
B. 30 yr
C. 40 yr
D. 50 yr
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Step by Step Answer:
After 123 years the brightness of the tritium will be half of its initial brightness After 246 year...View the full answer
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ISBN: 9780321595492
2nd Edition
Authors: Randall D. Knight, Brian Jones, Stuart Field
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