A discovery becomes more intelligible when its motivating question, proposed explanation and actual measurement can be followed together. The photoelectric effect connects Albert Einstein's light-quantum reasoning with the Millikan photoelectric experiment. The Schrödinger equation and the Davisson–Germer experiment connect mathematical wave mechanics with a laboratory test of matter waves.
The Nobel Prize in Physics provides one route through these subjects. Following the original papers and the people who built the apparatus also brings collaborators into view: Lester Halbert Germer appears alongside Clinton J. Davisson in the Davisson–Germer experiment. The history belongs in the articles on those people and concepts as well as in award records.
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The history of physics is the chronicle of how humanity has understood and explained the nature of the physical world from ancient times to the present. It encompasses the development of concepts, theories, and empirical methods that shape our understanding of matter, energy, force, and the fundamental laws governing the universe. Here are some key phases and figures in the history of physics: ### Ancient and Classical Physics 1.