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who invented photon?
The concept and discovery of the photon are closely tied to the development of quantum theory. Around 1900, theoretical physicist Max Planck found a solution to a problem that had troubled scientists for some time, involving the frequencies of electromagnetic radiation emitted by an object at various temperatures. He proposed that energy came in small, indivisible units, which he termed quanta. Albert Einstein’s work on the photoelectric effect in 1905 provided strong experimental evidence that quanta were real. It was not until 1926, however, that the term “photon” was first used — by the chemist Gilbert N. Lewis — to describe quanta of light.


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