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The height of a transmitting antenna is 200 m. Radius of earth is 6.4 × 106 m

1. Which one of the following is used in TV transmission?

  • Sky wave
  • Space wave
  • Ground wave
  • None of these

2. Find the range up to which the above antenna gives transmission signal.

3. Why is it necessary to use satellite for long distance transmission?

1 Answer

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1. Space wave

2. dm = \(\sqrt{2Rh}\)


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.

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