How madam marie curie and pierre curie discovered radioactivityANIMATIONRADIOACTIVITY

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Pierre and Marie Curie are best known for their pioneering work in the study of radioactivity, which led to their discovery in 1898 of the elements radium and polonium. Marie Curie, b. Maria Sklodowska in Warsaw, Poland, Nov. 7, 1867, d. July 4, 1934, spent many impoverished years as a teacher and governess before she joined her sister Bronia in Paris in order to study mathematics and physics at the Sorbonne, earning degrees in both subjects in 1893 and 1894. • The story behind the discovery • • In the spring of the latter year she met the physicist Pierre Curie. They married a year later, and Marie subsequently gave birth to two daughters, Irene (1897) and Eve (1904). • Pierre Curie, b. Paris, May 15, 1859, d. Apr. 19, 1906, obtained his doctorate in the year of his marriage, but he had already distinguished himself (along with his brother Jacques) in the study of the properties of crystals. He discovered the phenomenon of piezoelectricity, whereby changes in the volume of certain crystals excite small electric potentials. Along with work on crystal symmetry, Pierre Curie studied the magnetic properties of materials and constructed a torsion balance with a tolerance of 0.01 mg. He discovered that the magnetic susceptibility of paramagnetic materials is inversely proportional to the absolute temperature (Weiss-Curie's law) and that there exists a critical temperature above which the magnetic properties disappear (Curie temperature). • Since 1882, Pierre had headed the laboratory at the Ecole de Physique et de Chimie Industrielle in Paris, and it was there that both Marie and Pierre continued to work after their marriage. For her doctoral thesis, Madame Curie decided to study the mysterious radiation that had been discovered in 1896 by Henri Becquerel. With the aid of an electrometer built by Pierre and Jacques, Marie measured the strength of the radiation emitted from uranium compounds and found it proportional to the uranium content, constant over a long period of time, and uninfluenced by external conditions. She detected a similar immutable radiation in the compounds of thorium • #radiactivity #marie_curie#animation

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