The height of a transmitting antenna is 200 m. Radius of earth is 6.4

1.	The height of a transmitting antenna is 200 m. Radius of earth is 6.4 × 106 m1. Which one of the following is used in TV transmission?Sky waveSpace waveGround waveNone of these2. Find the range up to which the above antenna gives transmission signal.3. Why is it necessary to use satellite for long distance transmission?
Answer» 1. Space wave 2. d_m = \(\sqrt{2Rh}\) d_m= \(\sqrt{2\times6.4\times10^6\times200}m\) 3. Space waves can not be reflected back by iono sphere. Space wave can be reflected back to earth by making use of artificial satellite.

The height of a transmitting antenna is 200 m. Radius of earth is 6.4 × 106 m1. Which one of the following is used in TV transmission?Sky waveSpace waveGround waveNone of these2. Find the range up to which the above antenna gives transmission signal.3. Why is it necessary to use satellite for long distance transmission?

Answer»

1. Space wave

2. d_m = \(\sqrt{2Rh}\)

d_m= \(\sqrt{2\times6.4\times10^6\times200}m\)

3. Space waves can not be reflected back by iono sphere. Space wave can be reflected back to earth by making use of artificial satellite.