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  • Profile image: German theoretical physicist Max Planck 1858-1947
    Rights: Image courtesy of the Clendening History of Medicine Library, University of Kansas Medical Center Published 17 August 2011 Size: 11 KB Referencing Hub media

    Max Planck developed the idea that energy comes in small packets called quanta. He discovered a relationship between energy and radiation frequency – E = hf – where h is a constant called the Planck constant.

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