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Why is it necessary to use satellites for long distance TV transmission?

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Since T.V. signals have frequencies `100MHz-200MHz,` so they are not reflected by ionosphere and the TV signals are reflected back to earth by using artifical satellite.
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Is it necessary to use satellite for long distance T.V. transmission? Give reasons.

It is necessary ton use satellites for long distance TV transmission. Explain why?

A : It is necessary to use satellites for long distance TV transmission. R : Television signals are not properly reflected by the ionosphere therefore, reflection is effected by satellites.

Answer the following questions: (a) Long distance radio broadcasts use short-wave bands. Why? (b) It is necessary to use satellites for long distance TV transmission. Why? (c) Optical and radiotelescopes are built on the ground but X-ray astronomy is possible only from satellites orbiting the earth. Why? (d) The small ozone layer on top of the stratosphere is crucial for human survival. Why? (e) If the earth did not have an atmosphere, would its average surface temperature be higher or lower than what it is now? (f) Some scientists have predicted that a global nuclear war on the earth would be followed by a severe ‘nuclear winter’ with a devastating effect on life on earth. What might be the basis of this prediction? Answer the following questions: (a) Long distance radio broadcasts use short-wave bands. Why? (b) It is necessary to use satellites for long distance TV transmission. Why? (c) Optical and radiotelescopes are built on the ground but X-ray astronomy is possible only from satellites orbiting the earth. Why? (d) The small ozone layer on top of the stratosphere is crucial for human survival. Why? (e) If the earth did not have an atmosphere, would its average surface temperature be higher or lower than what it is now? (f) Some scientists have predicted that a global nuclear war on the earth would be followed by a severe ‘nuclear winter’ with a devastating effect on life on earth. What might be the basis of this prediction?

Why do we require a satellite for long distance T.V. transmission?

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MBD -HARYANA BOARD-PRINCIPLES OF COMMUNICATION-Short Answer Type Questions
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  20. Draw a block diagram to obtain amplitude modulated wave.

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