Johann Balmer was a Swiss mathematician and physicist, best known for his work in the field of spectroscopy. Born on May 1, 1825, he developed the Balmer series, which describes the wavelengths of light emitted by hydrogen when its electrons transition between energy levels. This series is fundamental in understanding atomic structure and has applications in various scientific fields. Balmer's contributions extended beyond the Balmer series; he also worked on mathematics and number theory. His research laid the groundwork for future studies in atomic physics and helped advance the understanding of quantum mechanics. Balmer passed away on March 12, 1898, leaving a lasting legacy in science.