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He discovered rays, invisible to the eye but NOT xray or cathodrays (have been discovered prior) but radioactive rays.
Antoine Henri Becquerel contributed to the discovery of radioactivity. He was a physicist, working with Marie and Pierre Curie when they discovered uranium.
Antoine Henri Becquerel was born on 15 December 1852.
A U-235 is a radioactive Uranium regulator. This radioactivity was accidentally discovered in 1896 by French physicist Antoine Henri Becquerel.
Henri Becquerel discovered radioactivity
Antoine Henri Becquerel won The Nobel Prize in Physics in 1903.
French scientist Henri Becquerel discovered radioactive elements.
Henri Becquerel discovered in 1896 the natural radioactivity.
See link below.
Henri Becquerel in 1896, using uranium salt (does not go well on chicken strips).
Henri becquerel
Henry Becquerel discovered radio-activity.