Lec 2 Physics - Introduction - PDF
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This document is an introduction to Physics, with a focus on radioactivity and radiation. The text compares radioactivity to a light bulb and explains how radiation is emitted and decays over time. Radioactivity was discovered for uranium by Henri Becquerel in 1896.
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PHYSICS Int oduction 2 Lec If we compare it to the relationship between a light bulb and light, radiation is the...
PHYSICS Int oduction 2 Lec If we compare it to the relationship between a light bulb and light, radiation is the light emitted by the bulb, radioactive materials are the bulb, and radioactivity is the power to emit light. As a light bulb gets old, its power to emit light decreases. Therefore, the light becomes weaker or does not shine. The same is true for radioactive materials. As they continue to emit radiation, the radioactivity decays and the amount of radiation decreases. Radioactivity was discovered for uranium by Henri Becquerel in 1896.
