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Q. |
Wireless transmission of signals can be done via |
A. | radio waves |
B. | microwaves |
C. | infrared |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: wireless transmission is carried out by radio waves, microwaves and ir waves. these waves range from 3 khz to above 300 ghz and are more suitable for wireless transmission. radio waves can penetrate through walls and are used in radio communications, microwaves and infrared (ir) waves cannot penetrate through walls and are used for satellite communications and device communications respectively. |
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