Charles Fabry (11.06.1867-11.12.1945) — French physicist, a member of the Paris Academy of Sciences (1927). Born in Marseille. Graduated from the École Polytechnique (1889), and in 1892 received the degree of Doctor of Physics at the University of Paris. In 1894—1920 he worked at the university in Marseille (professor from 1904), and in 1921 — 37 he was a professor at the University of Paris and the École Polytechnique and the first director of the Institute of Optics in Paris.
His research was concerned with optics, spectroscopy, astrophysics and acoustics. He considered theoretically (1896) the possibility of producing strong magnetic fields by means of solenoids. Together with A. Perot he built (1899) the interferometer named after them (the Fabry–Perot interferometer), carried out precise measurements of optical interference effects with it, and studied the spectra of the Sun and the stars. He carried out (1914) the first direct laboratory test of the Doppler principle for light. He showed that the ultraviolet absorption in the upper layers of the atmosphere is due to ozone. Together with R. Benoît and A. Perot he compared (1907) the length of the standard metre with the wavelength of the red line of cadmium.
Fellow of the Royal Society (…1931).