Which of following is NOT TRUE. a) Short range infrared communication system i one room cannot be affected by another system in next room b) Infrared signak can penetrate walls. c) Microwave signals can not penetrate walls d) Radio waves support multitasking A) a and b B) a, bando C) only b D) a b and d
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Answer:
- option D is the correct answer
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Answer: D) a b and d
Explanation:
Radio waves are the electromagnetic waves that are transmitted in all the directions of free space.
Radio waves are omnidirectional, i.e., the signals are propagated in all the directions.
The range in frequencies of radio waves is from 3Khz to 1 khz.
In the case of radio waves, the sending and receiving antenna are not aligned, i.e., the wave sent by the sending antenna can be received by any receiving antenna.
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