![]() ![]() ![]() In addition, the strength of the rays remained the same, regardless of whether the compounds were in solid or liquid state.Ĭurie continued to test more uranium compounds. ![]() She found that uranium compounds also emitted similar rays. The instruments detected the faint electrical currents generated when the air between two metal plates was bombarded with uranium rays. Then she measured the strength of the rays produced by the uranium using instruments designed by her husband. According to Goldsmith, Curie coated one of two metal plates with a thin layer of uranium salts. Marie and Pierre Curie pictured on their honeymoon (Image credit: Bettman via Getty Images) Radioactive DiscoveriesĬurie was intrigued by the reports of German physicist Wilhelm Röntgen's discovery of X-rays and by French physicist Henri Becquerel's report of similar "Becquerel rays" emitted by uranium salts. ![]()
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