Antoine-Henri Becquerel studied at the Ecole Polytechnique. In 1875 he joined the department of roads and bridges, and came to chief engineer in 1894. In 1892 he succeeded his father to the chair of the Musée d'Histoire Naturelle, and in 1895 came a professor at the École Polytechnique.
Continued studies of his father, and the discovery of X-rays by Roentgen (1896) did Antoine Henri Becquerel thought that this new radiation could be related to the fluorescence and fosforescè , nce.
Conduct experiments in such fields accidentally discovered that a compound of uranium Velaves photographic plates wrapped in black paper being placed upon them, and Antoine-Henri Becquerel deduced that this phenomenon was characteristic of the atom of the element, thus discovering the natural radioactivity.
Later, Antoine-Henri Becquerel showed that, with the assumption, the radiation Velaves plate does not consist in X-rays, but three types of radiation: a, β and γ. This research earned him the Nobel Prize for physics in 1903, which he shared with Curie.
He also studied the polarization and absorption of light in crystals.