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प्रश्न
Give two examples of communication system which use space wave mode.
A TV tower is 80 m tall. Calculate the maximum distance upto which the signal transmitted from the tower can be received.
उत्तर
Examples of communication systems which use space wave mode are
(i) Television broadcast
(ii) Microwave links
(iii) Satellite communication
(Any two examples can be taken)
The maximum distance up to which signals can be received, `d = sqrt(2R_Eh_T)`
`=sqrt(2 xx 6400000 xx 80)`
= 32000 m
= 32 km
Hence, the maximum distance up to which the transmitted signal can be received is 32 km.
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