Dennis Gabor (Gábor Dénes) (1900-1979) was a Hungarian physicist. He invented holography in 1947, for which he received the Nobel Prize in Physics in 1971.
... April 7 - Ralph Bunche[?], diplomat, winner of the Nobel Peace Prize April 16 - Fifi D'Orsay, actress (+ 1983) April 22 - Robert Oppenheimer, physicist (+ 1967) May ...