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Working alone, Niels Ryberg Finsen, a Faroese-Danish physician and scientist, dedicated his efforts to unraveling Therapeutic potential of light. His pioneering research, conducted primarily in his private laboratory, led him to discover phototherapy, a groundbreaking treatment utilizing specific light wavelengths to address various medical conditions. Finsen's solitary journey revolutionized medicine and earned him the esteemed Nobel Prize in Physiology or Medicine in 1903.