Karl Erich Hupka

Karl Erich Hupka , shortly Erich Hupka (* 1884 in Upper Silesia ; † 1919 at sea in South Africa ) was a German physicist. He was the father of Herbert Hupka .

Life

Erich Hupka studied physics at the Friedrich-Wilhelms-Universität zu Berlin . He was a student of Max Planck , who in 1905 was the first to support Albert Einstein's theory of relativity in a colloquium at the Humboldt University in Berlin . In the years that followed, Planck published several papers in which he presented further conclusions from Einstein's theory. He succeeded in getting Erich Hupka interested in writing a dissertation on the special theory of relativity . At the Physikalisches Institut under Heinrich Rubens, Hupka carried out measurements on cathode rays to determine the velocity dependence of the electron mass.

In contrast to Walter Kaufmann and Alfred Bucherer , Hupka used cathode rays of up to 0.5 coulomb for his experiments in 1909 . The rays generated by a copper cathode were accelerated by a field between the anode and cathode of an evacuated discharge tube . The anode served as a diaphragm through which the beams passed at constant speed and which cast the shadow of two Wollaston wires onto a phosphorescent screen behind a second diaphragm. When a current was created behind the diaphragm, the rays were deflected and the silhouette shifted. The data agreed with the Lorentz- Einstein formula, but Hupka added that his experiment did not lead to a definitive decision. In 1909 he was appointed as Planck's graduate student with the thesis The inertial mass of moving electrons (phil Dr.) To the doctor doctorate .

In 1914 he was offered a position at the German-Chinese University in Tsingtau . In July 1914, shortly before the outbreak of World War I, he and his young wife Therese, née Rosenthal, embarked on a multi-week voyage on a Dutch ship. In Colombo on Ceylon, the family was interned by the British colonial power. The couple was relocated to the British garrison town of Diyatalawa , where their son Herbert was born on August 15, 1915 . Then the Hupka family came to Australia in the Molonglo Internment Camp on the Molonglo River west of Canberra . While on the boat trip to Germany, his father succumbed to a pneumonic plague near Durban in 1919 .

From 1906 to 1918 he was a member of the German Physical Society (DPG).

Fonts

• The inert mass of moving electrons . (At the same time inaugural dissertation to obtain a doctorate, approved by the Philosophical Faculty of the Friedrich-Wilhelms-Universität zu Berlin), Metzger & Witting, Leipzig 1909.
• with Heinrich Fassbender : Magnetic investigations in the high-frequency circuit . Barth, Leipzig 1912
• with Heinrich Fassbender: Recording of oscillation curves of small amplitudes . Hirzel, Leipzig 1912.
• with Heinrich Fassbender: Method for determining hysteresis curves in electr. Vibrations. Braunschweig 1912.
• with Heinrich Fassbender: Evidence of vibrations of the first and second kind on the Poulsenbogen . Hirzel, Leipzig 1913.
• with Wilhelm Steinhaus : Contribution to the knowledge of the nature of X-rays . Vieweg, Braunschweig 1913.
• About phenomena that occur when X-rays are reflected on crystals. Some phenomena connected with reflected X-rays . Vieweg, Braunschweig 1913. (German / English)
• with Wilhelm Steinhaus: Systems of Lines obtained by Reflections of X-rays . Charlottenburg 1913.
• with Wilhelm Steinhaus: Generation of interference fringes using X-rays . Braunschweig 1913.
• About the passage of X-rays through metals . Hirzel, Leipzig 1914.
• The interference of the X-rays. With 33 illustrations and 1 double plate . F. Vieweg & Sohn, Braunschweig 1914. / New edition; ISBN 978-3-663-02179-7 .

See also

• Kaufmann-Bucherer-Neumann experiments