James Franck

James Franck was a German physicist known for his significant contributions to atomic and molecular physics. He co-discovered the Franck-Hertz experiment, which demonstrated the quantized nature of energy levels in atoms, a fundamental concept in understanding atomic structure. This experiment provided evidence for how electrons interact with energy and helped establish the principles of quantum mechanics. Franck's work laid the groundwork for advancements in fields such as nuclear physics and chemistry, influencing our understanding of atomic behavior and the structure of matter. He received the Nobel Prize in Physics in 1925 for his research in these areas.