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Long distance radio broadcasts use short...

Long distance radio broadcasts use short wave bands. Explain why?

A

ground wave

B

lonospheric wave

C

direct wave

D

sky wave

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The correct Answer is:
C
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A : Long distance radio broadcasts use short-wave bands. R : Ionosphere reflects waves in these bands.

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RESONANCE ENGLISH-COMMUNICATION SYSTEMS-Exercise 2
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  18. The phenomenon used in optical fibres for transitions of light energy ...

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