Which one of the following modes of transmission required the devices

1.	Which one of the following modes of transmission required the devices to be in a direct line of sight with each other
Answer» 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.

Which one of the following modes of transmission required the devices to be in a direct line of sight with each other

Answer»

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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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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