Friedrich Hasenöhrl (November 30, 1874 - October 7, 1915), was an Austrian scientist. November 30 is the 334th day (335th on leap years) of the year in the Gregorian calendar, with 31 days remaining, as the final day of November. ... 1874 was a common year starting on Thursday (see link for calendar). ... October 7 is the 280th day of the year (281st in leap years). ... 1915 was a common year starting on Friday (see link for calendar). ...

Friedrich Hasenöhrl was born in Vienna, Austria in 1874. His father was a lawyer and his mother belonged to a prominent aristocratic family. After his elementary education, he studied natural science and mathematics at the University of Vienna under Stephan and Boltzmann. He worked under H. A. Lorentz in Leiden at the low temperature laboratory. Wikipedia does not have an article with this exact name. ... Wikipedia does not have an article with this exact name. ... Hendrik Antoon Lorentz (July 18, 1853, Arnhem – February 4, 1928, Haarlem) was a Dutch physicist and the winner of the 1902 Nobel Prize in Physics for his work on electromagnetic radiation. ...

In 1904 and 1905 he published two papers on the inertia of a cavity containing radiation. He derived a formula connecting mass, energy and the speed of light that written in modern terms is E=(4/3)mc², which only differs in the constant of 4/3 from the famous one credited to Albert Einstein. This was an entirely classical derivation (no use of special relativity) and used Maxwell's equation for the pressure of light. It is worth noting that Einstein's 1905 derivation of E=mc² was also given as an approximation, good in the limit as v²c² approached zero. 1904 is a leap year starting on a Friday (link will take you to calendar). ... 1905 was a common year starting on Sunday (see link for calendar). ... Portrait of Albert Einstein taken by Yousuf Karsh on February 11, 1948 Albert Einstein (March 14, 1879 – April 18, 1955) was a German theoretical physicist who is widely regarded as the greatest scientist of the 20th century. ...

In 1907 he became Boltzmann's successor at the University of Vienna as the head of the Department of Theoretical Physics. He had a number of illustrious pupils there and had an especially significant impact on Erwin Schrödinger, who later won the Nobel Prize for Physics for his contributions to Quantum Mechanics. Erwin Schrödinger, as depicted on the former Austrian 1000 Schilling bank note. ... List of Nobel Prize laureates in Physics from 1901 to the present day. ...

When the war broke out in 1914, he volunteered at once into the Austria-Hungarian army. He fought as Oberleutnant against the Italians in the South Tyrol. He was wounded, recovered and returned to the front. He was then killed in action on October 7, 1915 at the age of 40. 1914 is a common year starting on Thursday. ... 1915 was a common year starting on Friday (see link for calendar). ...

References

• Hasenöhrl,Friedrich, Berichte der Wiener Akadamie, 113, 1039 (1904).
• Hasenöhrl,Friedrich, Annalen der Physik, 16, 589 (1905).
• Lenard, Philipp, Great Men of Science. Translated from the second German edition, G. Bell and sons, London (1950) ISBN 083691614X

Annalen der Physik is one of the best-known and oldest (it was founded in 1799) physics journals worldwide. ...

External Links

• Career at University of Vienna (http://www.univie.ac.at/archiv/tour/17.htm)
• Military record (http://www.austro-hungarian-army.co.uk/10_14.html)