Q:

Infrared waves, that can be used for short range communication have frequencies between

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Infrared waves, that can be used for short range communication have frequencies between


  1. 300 GHz to 700 THz
  2. 300 GHz to 800 THz
  3. 300 GHz to 100 THz
  4. 300 GHz to 400 THz

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 (d).300 GHz to 400 THz

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