@Regrann from @iaeaorg -  Happy Birthday, Arthur Compton, discoverer of the Compton effect! This phenomenon demonstrates the particle nature of electromagnetic radiation. Compton shot X-rays at a metal surface and observed how they behaved. He found that the X-rays became less intense — or had longer wavelengths — after hitting the target than before hitting it. This was due to the extra energy actually transferring from the X-rays to some of the electrons contained in the material. It was a remarkable discovery at the time, and earned Compton the Nobel Prize in Physics in 1927. Today, scientists use their understanding of the Compton effect to safely and securely harness atomic energy for a range of uses, from medicine to research to industry.
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