Who is a scientist who was slapped by Edison?

Nikola Tesla (1856-1943), born in Croatia on July 1th, 1856, is a world-famous inventor, physicist, mechanical engineer and electrical engineer. At the end of 19th century and the beginning of 2th century, he made outstanding contributions to electricity and magnetism. His patents and theoretical work are based on modern alternating current power systems, including multiphase power distribution systems and alternating current generators, which helped him bring about the second industrial revolution. His achievement was that in 1882, shortly after Edison invented direct current (DC), he invented alternating current (AC), made the world's first alternator, and founded multiphase power transmission technology. He is a peerless genius and a great man forgotten by the world. On January 7th, 1943, he died of heart failure alone in new york Hotel at the age of 87.