Answer: Albert Einstein
Notes: Photon, also called light quantum, refers to minute energy packet of electromagnetic radiation. The concept originated in 1905 in Albert Einstein’s explanation of the photoelectric effect, in which he proposed the existence of discrete energy packets during the transmission of light. The 1921 physics Nobel prize was awarded to Einstein in most famous for his theory of relativity, but it is his discovery of photons that is mentioned by the Swedish Academy.
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