A. Newton
B. Becquerel
C. Alexender
D. All of these
🧠 Explanation:
Radioactivity was discovered by Henri Becquerel in 1896, a groundbreaking achievement in physics. While studying phosphorescence in uranium salts, he found they emitted radiation spontaneously, leading to the identification of radioactivity. This discovery paved the way for advancements in nuclear science, medical treatments, and energy production. Becquerel’s work earned him the 1903 Nobel Prize in Physics, shared with the Curies. His findings revolutionized scientific understanding of atomic behavior, influencing fields like medicine, archaeology, and energy, making radioactivity a cornerstone of modern science with applications in cancer treatment and carbon dating.
