1.

(i) What is the line of sight communication? (ii) Why is it not possible to use sky wave propagation for transmission of TV signals?

Answer»

(a) LOS Communication: The propagation of a radio wave in a straight line from transmitting to receiving antenna on the ground is called line of sight communication. 

(b) TV signals have high frequency range 100 to 200MHz. Ionospheric layers do not reflect back such high frequency signals. Hence, sky waves cannot be used for transmission of TV signals.



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