Physics.[ref]
https://archives.trin.cam.ac.uk/index.php/catalogue-of-the-papers-and-correspondence-of-sir-george-paget-thomson-frs-1892-1975. Independent professional profile
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George Paget Thomson (1892–1975) was a British physicist known for his significant contributions to the understanding of electron diffraction and wave-particle duality. He was the son of the prominent physicist J.J. Thomson, who is famous for the discovery of the electron.