Naturaleza de los Rayos Catódicos (1895) J. J. Thompson There is no other branch of physics which affords us so promising an opportunity of penetrating.

Presentación del tema: "Naturaleza de los Rayos Catódicos (1895) J. J. Thompson There is no other branch of physics which affords us so promising an opportunity of penetrating."— Transcripción de la presentación:

1 Naturaleza de los Rayos Catódicos (1895) J. J. Thompson There is no other branch of physics which affords us so promising an opportunity of penetrating the secret of electricity."

2 Naturaleza de los Rayos Catódicos (1895) "This experiment shows that however we twist and deflect the cathode rays by magnetic forces, the negative electrification follows the same path as the rays, and that this negative electrification is indissolubly connected with the cathode rays" "I can see no escape from the conclusion that [cathode rays] are charges of negative electricity carried by particles of matter." J. J. Thompson "we have in the cathode rays matter in a new state, a state in which the subdivision of matter is carried very much further than in the ordinary gaseous state: a state in which all matter... is of one and the same kind; this matter being the substance from which all the chemical elements are built up."

3 1895 - Wilhelm Röntgen, primer premio Nóbel de Física en 1901 descubre los rayos X.

4 Primer detector: BaPt(CN) 4 (fluorecente)

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6 1896 - Henri Becquerel (primer premio Nóbel de Física en 1903), descubre la radiación.

7 Efecto Piezoelectrico (1880) Pierre Curie Paul CuriePaul Langevin

8 Efecto Piezoelectrico

9 1898 - Pierre y Marie Curie descubren nuevos elementos radioactivos (Polonio y Radio).

10 Los Curie Reciben el Premio Nóbel de Física en 1903 in recognition of the extraordinary services they have rendered by their joint researches on the radiation phenomena discovered by Professor Henri Becquerel"

11 Productos para el hogar…

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15 Rutherford “alquimia” Rutherford identifica la emisión ,  y  (difieren e su poder penetrante) y caracteriza distintos materiales según su tiempo de vida media.

16 Rutherford “alquimia” Identifica que el Radio (fuente de partículas alfa, transforma al N en O e H). Premio Nóbel de Física 1908

17 El experimento de Rutherford

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20 1932 -El neutron – James Chadwick Premio Nobel de Fisica 1935

21 Fisión Nuclear Otto Hahn Premio Nóbel de Química 1945 Nuevos Isótopos I. Curie – F. Joliet-Curie Premio Nóbel de Química 1935

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