Hedy Lamarr an Actress, Mathematician or Scientist?

Hedy Lamarr (wi-fi and bluetooth)
Can you believe it that Hedy Lamarr, most people recognize her as an actress was also a mathematician and she was the inventor of frequency hopping spread spectrum. It is the technology which is nowadays used for bluetooth and Wifi communications. Thanks to Hedy Lamarr for such a great invention due to which we have wifi. 

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