Antoine Henri Becquerel -

: This proved that radiation was an inherent property of certain atoms, a phenomenon later named "radioactivity" by his doctoral student, Marie Curie . Key Scientific Contributions

: He was the first to realize that beta particles were identical to the high-speed electrons recently discovered by J.J. Thomson.

: In 1901, after being accidentally burned by a vial of radium in his pocket, he realized that radioactivity could affect living tissue. This led to the birth of radiotherapy for treating cancer. Awards and Legacy Henri Becquerel – Facts - NobelPrize.org antoine henri becquerel

: In 1899, he demonstrated that some radioactive rays (beta particles) could be deflected by magnetic fields, proving they were charged particles rather than waves.

: Inspired by the discovery of X-rays, Becquerel wanted to see if phosphorescent materials emitted X-rays after being exposed to sunlight. : This proved that radiation was an inherent

: Days later, he developed the plate and found a clear, dark image of the crystals—meaning they were emitting "penetrating rays" spontaneously, without any external energy source like the sun.

Becquerel's most famous achievement was an accidental discovery involving uranium salts. : In 1901, after being accidentally burned by

Antoine Henri Becquerel (1852–1908) was a Nobel Prize-winning French physicist renowned for his discovery of . His work laid the foundational stone for nuclear physics and changed our understanding of the atomic structure. The Discovery of Radioactivity (1896)