Henri Becquerel
![](/Images/godic/202412/23/Portrait_of_Antoine-Henri_Becquerel2501.jpg")
![Becquerel in the lab](/Images/godic/202412/23/Becquerel_in_the_lab2501.jpg")
![Image of Becquerel's photographic plate which has been fogged by exposure to radiation from a uranium salt. The shadow of a metal Maltese Cross placed between the plate and the uranium salt is clearly visible.](/Images/godic/202412/23/Becquerel_plate2501.jpg")
Antoine Henri Becquerel (15 December 1852 – 25 August 1908) was a physicist, Nobel laureate, and the discoverer of radioactivity. For work in this field he, along with Marie Skłodowska-Curie and Pierre Curie, received the 1903 Nobel Prize in Physics. The SI unit for radioactivity, the becquerel (Bq), is named after him.