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Assertion: Space waves are used for line...

Assertion: Space waves are used for line -of -sight communication.
Reason: Space wave travels in a straight line from transmitting antenna to the receiving antenna.

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A space travels in a straight line from transmitting antenna to the receiving antenna. Space wave are used for line-of-sight communication as well as satellite comunication As frequencies above 40 MHz communication is essentially limited t line-of-sight paths.
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