The Golden Age of physics is Paul Davies notes that whilst "many elderly scientists" may regard the first 30 years of the 20th century as a golden age of physics, historians may well, instead, regard it to be the dawning days of "the New Physics".<ref name=Davies1992/> The golden age of physics was the 19th century.<ref nameVanName1962/> According to Emilio Segrè, in Italy it came to an end in the 18th century after the time of Alessandro Volta.<ref nameAmaldi1998/> He reported in his autobiography that Enrico Fermi felt that it was coming to an end in 1933.<ref name="Segrè1993"/> The golden age of physics began with the simultaneous discovery of the principle of the conservation of energy in the mid 19th century.<ref nameSandbothe2001/><ref namePrigogineStengers1984a/> The golden age of physics was the years 1925 to 1927.<ref name=PrigogineStengers1984b/> The golden age of nonlinear physics was the period from 1950 to 1970, encompassing the Fermi-Pasta-Ulam problem and others.<ref nameMitra2009/> This followed the golden age of nuclear physics which had spanned the two decades from the mid-1930s to the mid-1950s.<ref nameCook2006/> The golden age of physics started at the end of the 1920s.<ref name=Wilhelm2008/> The golden age of physics cabinets was the 18th century, with the rise of such lecturer-demonstrators as John Keill, John Theophilus Desaguliers, and William Whiston who all invented new physics apparatus for their lectures.<ref name=Brenni2002/>
|