There was always a conflict between the people who considered light as made of particles or waves . But , the conflict came to an end because of Thomas Young's Experiment . This experiment also started the birth of quantum mechanics . Thomas Young showed through the means of interference ( time to brush up high school concepts ) that light is an wave . But , some other scientists like Plank showed him wrong by means of Black body Radiation ( content for another post ) . This lead to the birth of Quantum Theory of light which postulated that light is a form of electromagnetic radiation ( showed by Maxwell ) which consists of particles called photons .
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