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प्रश्न
Why is it not possible to use sky waves for transmission of TV signals?
उत्तर
Transmission of TV signal is done with the help of radio waves of frequency ranging between 80 MHz and 200 MHz. The transmission is not possible via sky wave because the ionosphere doesn't reflect these waves back to earth. Waves of frequencies ranging between 1500 kHz and 30 MHz can be used for communication via sky wave.
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संबंधित प्रश्न
Upto what distance can a signal be transmitted using an antenna of height 'h'?
Distinguish between ‘sky waves’ and ‘space waves’ modes of propagation in communication system.
(a) Why is sky wave mode propagation restricted to frequencies upto 40 MHz?
(b) Give two examples where space wave mode of propagation is used.
What is the range of frequencies used in satellite communication?
What is common between these waves and light waves?
What is meant by satellite communication?
Give the applications of satellite communication.
