Is it possible to transmit a signal through space (air) in a form other than electromagnetic waves?

Replies

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  Harshad Italiya

  Using Light Signal you can transmit Signal through air like LASER Light. But as in Day light this technique is not reliable. while Electromagnatic Signals has less interference of Day Lights.
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  yahia zakaria

  you can use acoustic waves , by the way laser or light is electromagnetic waves
  thanks
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  narayana murthy

  I think we can use sound waves but it is only for shorter distences and for longer distences we use electromagnetic waves because they are relieble and loses are less compared to other types..
  and for secrets you can use ultra sound wave signals
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  rukawa

  Thank you all for your answers so far. Actually I have another question: what are the environments in which it's possible to transmit signals via electromagnetic waves? (water, air, fluids...)
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  narayana murthy

  Any medium is almost same except some medium resistence as per my knowledge every medium supports any signal except vaccum so in vaccum we need electromagnetic signals
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  yahia zakaria

  for electromagnetic waves any medium could be good except conductors ,as the conductors allow a very small distance for electromagnetic waves propagation (i.e salt water that's why they use acoustic waves in submarines ).
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  soni.sapan

  We can transmitt electromagnetic waves(light waves, infrared etc) in any medium. they have always velocity approx to "C" in all mediums. On other side we cant transmitt acoustic wawe in space. For the travelling of acoustic wawe there must be a medium.They are not used genereally because of their low range & the biggest disadvantage is that they have lower speed approx 300m/s which is very slow for communication
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  robo_warrior

  physics 101:mechanical waves(sound)
  :electromagnetic(LASER,radio waves)
  :matter waves(much less used)
• 

  crashtestpilot

  It's a little abstract but there is something called quantum entanglement. It is an interesting concept but beyond my ability to give a clear and concise definition.
  
  I apologize for posting a wikipedia link as a reference but it should point you towards more reliable references. Quantum Entanglement
  
  You can also Google, "Schrodinger's cat", "wave particle duality" and "double slit experiment." These lay some of the groundwork for the concept of a quantum particle.
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  rukawa

  Thank you all for your answers 😀