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What is radioactivity

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What is radioactivity

    • Posted by Ajay Kumar 5 years, 11 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    Yogita Ingle 5 years, 11 months ago

    Radioactivity

    • Radioactivity is a nuclear phenomenon in which an unstable nucleus undergoes decay to form stable nuclei.
    • Radioactivity was discovered accidentally by a scientist Henry Becquerel (1896).
    • Only those nuclei which are unstable will show the phenomenon of radioactivity.
    • Fluorescence is a property shown by fluorescent objects; when visible light falls on a fluorescent object then these objects will also start emitting light.
    • Henry Becquerel performed experiments on some fluorescent objectsand he gave a hypothesis that fluorescent objects along with the visible light also emit some kind of radiation as well.

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