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There are 5 lessons in this physics tutorial covering Radioactivity and Half-Life. The tutorial starts with an introduction to Radioactivity and Half-Life and is then followed with a list of the separate lessons, the tutorial is designed to be read in order but you can skip to a specific lesson or return to recover a specific physics lesson as required to build your physics knowledge of Radioactivity and Half-Life. you can access all the lessons from this tutorial below.
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As explained in article 20.1, natural occurring radioactivity was discovered accidentally by Henry Becquerel in 1896, one year after Rontgen discovered X-rays as a form of EM radiation. As stated earlier, Becquerel knew that natural radioactivity (the ability of an atomic nucleus to emit radiation by its own that is without any external action) was not a form of radiations known up to that time, so it required further and deeper studies.
This article explains more in detail the phenomenon of radioactivity with all its forms. Likewise, the corresponding mathematical relations governing the radioactivity laws and quantities are provided here, so that readers will understand how to estimate the danger arisen from exposure to radioactive substances.
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