IN 1907 HE RECEIVED THE NOBEL PRIZE IN PHYSICS, BECOMING THE FIRST AMERICAN TO WIN A NOBEL PRIZE IN A SCIENCE, FOR HIS OPTICAL PRECISION INSTRUMENTS AND THE SPECTROSCOPIC AND METROLOGICAL INVESTIGATIONS CARRIED OUT WITH THEIR AID AND WHO IS ESPECIALLY KNOWN FOR HIS EXPERIMENT THAT PLAYED A CRUCIAL ROLE IN THE HISTORY OF RELATIVITY
ALBERT ABRAHAM MICHELSON (1852-1931) SIGNED CARD, “Very truly yours, A. A. Michelson”, on a card 4 x 1.75, by the American physicist known for his work on measuring the speed of light, which started a new era in the development of physics; and especially for the Michelson-Morley experiment (a type of experiment that forms one of the fundamental tests of special relativity theory). He was the founder and the first head of the physics department of the University of Chicago. He invented the astronomical interferometry which is used to provide higher resolution images of astronomical objects such as stars, nebulas, and galaxies. The card is in fine condition, with minor age toning, and dated, "1907" in another hand at bottom left.