Give reasons for the following : i. Long distance radio broadcast uses short wave bands.
Give reasons for the following :
i. Long distance radio broadcast uses short wave bands.
ii. Satellites are used for long distance TV transmission.
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i. Long distance radio broadcast uses short wave bands because electromagnetic waves only in the frequency range of short wave bands only are reflected by the ionosphere.
ii.
a. It is necessary to use satellites for long distance TV transmissions because television signals are of high frequencies and high energies. Thus, these signals are not reflected by the ionosphere.
b. Hence, satellites are helpful in long distance TV transmission.
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