becquerel

• Nom propre se référant au physicien français connu pour la découverte que les rayons émis par les sels d'uranium agissent sur les plaques photographiques ; également unité de mesure de la radioactivité.

A proper noun referring to a French physicist known for discovering that rays emitted by uranium salts affect photographic plates.

indénombrable · nom propre

1. C1formalscientific

   Antoine Henri Becquerel (1852–1908), a French physicist who discovered radioactivity, specifically that uranium salts emit rays that affect photographic plates.

   physicien français

   • Becquerel's discovery of radioactivity earned him the Nobel Prize in Physics in 1903.
   • The unit of radioactivity, the becquerel, is named after him.
   • Becquerel's experiments with uranium salts laid the foundation for nuclear physics.

2. C1formalscientific

   The SI unit of radioactivity, equal to one radioactive decay per second.

   becquerel (unité de radioactivité)

   • The sample had an activity of 500 becquerels.
   • Radiation levels are measured in becquerels per kilogram.
   • One becquerel is a very small amount of radioactivity.