Which one of the following modes of transmission required the devices to be in a direct line of sight with each other
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Answer:
Explanation: It is a kind of light so it moves in straight line while other two are in wave form . So, infra-red required the transmission in straight line.
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Explanation:
It is a kind of light so it moves in straight line while other two are in wave form . So, infra-red required the transmission in straight line.
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