Nikola Tesla, Serbian-American inventor, physicist, mechanical engineer, and electrical engineer. Tesla was born in Smiljan, Croatia, Yugoslavia on July 10, 1856. In 1895, he manufactured generator sets for the Niagara Power Station in the United States. The power station is still one of the world's famous hydropower stations. In 1897, he made Marconi's theory of radio communication a reality. In 1898, he built the world's first radio-controlled boat and patented radio-controlled technology. In 1899, he invented X-ray (X-Ray) photography technology. Other inventions include: radio, radar, fax machine, vacuum tube, neon light tube, missile navigation, etc. The magnetic density unit (1Tesla=10000Gause) was named after him, indicating his contribution to magnetism.