Ernst Mach Born February 18, 1838February 18, 1838, Johann Mach and Josephine Lanhaus gave birth to son, Ernst Waldfried Josef Wenzel Mach, in Moravia (now part of the Czech Republic). Ernst Mach was educated at home until he was 14 years old. At 17, he attended the University of Vienna, and in 1860 received his doctorate in physics. He taught mechanics and physics in Vienna until 1864, then became a mathematics professor.at the University of Graz.
"Ernst Mach". Britannica.
Doppler TheoryMach's first scientific contribution was in 1845 involving the new discovered "Doppler Theory". In 1841, Doppler discovered that sound changes in frequency, which moves forward and away from the observer. Mach was able to include all wave phenomena and light. He designed an apparatus that demonstrated that the Doppler effect was true.
Ernst Mach. https://plato.stanford.edu/entries/ernst-mach/#:~:text=Ernst%20Mach%20(February%2018%2C%201838,to%20understanding%20the%20Doppler%20effect.
Mach BandsIn 1865, he traded his math chair for one in Physics while at Graz. In 1866, he discovered the phenomenon, "Mach Bands". "Mach Bands" explained how the "tendency of the human eye to see bright or dark bands near the boundaries between areas of sharply differing illumination". In 1867 he left and became a professor of experimental physics at Charles University in Prague, where he continued to stay for the next 28 years.
"Ernst Mach".Britannica. https://www.britannica.com/biography/Ernst-Mach
Supersonic MotionIn 1885, Mach had figured out the details of supersonic motion, while also developing high speed photogenic techniques. In 1898, he suffered a stroke and retired in 1901. February 19, 1916, Ernst Mach passed away near Munich. https://www.youtube.com/watch?v=9S5xhUo8p44 Ernst Mach. https://plato.stanford.edu/entries/ernst-mach/#:~:text=Ernst%20Mach%20(February%2018%2C%201838,to%20understanding%20the%20Doppler%20effect.