id author title date pages extension mime words sentences flesch summary cache txt en-wikipedia-org-6660 Ernst Mach - Wikipedia .html text/html 4743 666 64 Ernst Waldfried Josef Wenzel Mach (/mɑːx/; German: [ˈɛɐ̯nst ˈmax]; 18 February 1838 – 19 February 1916) was an Austrian[8] physicist and philosopher, noted for his contributions to physics such as the study of shock waves. He famously declared, after an 1897 lecture by Ludwig Boltzmann at the Imperial Academy of Science in Vienna: "I don't believe that atoms exist!"[16] From about 1908 to 1911 Mach's reluctance to acknowledge the reality of atoms was criticized by Max Planck as being incompatible with physics. Empirio-criticism is the term for the rigorously positivist and radically empiricist philosophy established by the German philosopher Richard Avenarius and further developed by Mach, which claims that all we can know is our sensations and that knowledge should be confined to pure experience.[22] Ernst Mach's Vienna 1895–1930: Or Phenomenalism as Philosophy of Science. ./cache/en-wikipedia-org-6660.html ./txt/en-wikipedia-org-6660.txt