Henri Becquerel was born in one of the world's most beautiful city. Paris, on December 15, 1852. Hemri's father, Alexander Edmond Becquerel (1820-91), his grandfather, Antoine Cesar Baser Becquerel (1788-1878) and his son jean Becquerel (1878-1953) too, were all scientists. Thus, Henri was born in a well educated and cultured family of scientists. After his early schooling at the Lycee Louis-le-Grand. Henri received his formal scientific education at the-Grand, Henri received his formal scientific education at the Ecole Poly-technique (1872-74) and had engineering training at the Ecole des Ponts et Chaussees ( Bridges and Highways School 1874-77).
In addition to his teaching and research Points, Becquerel worked as an engineer in the Department of Bridges and Highways for many years, being appointed chief engineer in 1894. He took up his first academic position in 1876 as assistant teacher at the Ecol poly-technique. where in 1895 he succeeded to the chair of physics. Contently. he was assistant naturalist to his father at the museum, where he also assumed the physics professorship upon his father's death. Becquerel studied the effects of radioactivity and radioactive decay. in this study he found that when ultraviolet light falls on the material, it tries to absorb the radiation energy. Due to this, electromagnetic radiations are emitted. The material radiates if it is in an excited state with the help of electromagnetic radiation or if it is made up of highly charged and energized particles. Till the energy to radiate is present in an object, the event or phenomenon is visible. This is Known as phosphorescence. when the object stops radiating light it gets into a state called radioactive decay when there is no radiation visible