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What did Henri Becquerel use in the discovery of radioactivity?

April 26, 2017Discovery radioactivity

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What did Henri Becquerel use in the discovery of radioactivity?

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Becquerel wrapped a fluorescent substance, potassium uranyl sulfate, in photographic plates and Becquerel wrapped a fluorescent substance, potassium uranyl sulfate, in photographic plates and black material in preparation for an experiment requiring bright sunlight material in preparation for an experiment requiring bright sunlight.