Hedy Lamarr's acting career was not very smooth. She first moved from Germany to Paris, France, and then came to Hollywood to film. In the second year of Hollywood, during World War II, Hedy Lamarr invented wireless frequency hopping technology. 194 1 year, Hedy Lamarr saw that his country was suffering from war, so he learned from the principle of musician George Antell playing the piano synchronously and invented "frequency hopping technology", which laid the foundation for CDMA, Wi-Fi and other technologies. 1942, Hedy Lamarr obtained the patent of "frequency hopping technology" issued by the United States, so Hedy Lamarr is called the mother of wifi!