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Long distance short-wave radio broadcast...

Long distance short-wave radio broadcasting uses

A

ground wave

B

ionospheric wave

C

direct wave

D

sky wave

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The correct Answer is:
B
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Long distance short - wave radio frequency broadcasting uses:

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

A : Long distance radio broadcasts use short-wave bands. R : Ionosphere reflectes waves in these bands.

Statement 1: Long distance radio broadcasts use short wave bands. Statement 2: Short wavelength signals are reflected by the ionosphere.

Give reasons for the following: (i) Long distance radio broadcasts use short-wave bands. (ii) The small ozone layer on top of the stratosphere is crucial for human survival. (iii) Satellites are used for long distance TV transmission.

Why long distance radio broadcasts use shortwave bands?

NIKITA PUBLICATION-COMMUNICATION SYSTEMS-Multiple Choice Questions (Space communication )
  1. The electromagnetic waves of frequency 2 MHz and 30 MHz are

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  2. Ground wave propagation is suitable for

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  3. Long distance short-wave radio broadcasting uses

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  4. When microwave signals follow the curvature of earth, this is known as...

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  5. Through which mode of propagation, the radio waves can be sent from on...

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  6. In space communcation , the information can be passed from on place ...

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  7. What will be the area of reception of the signals transmitted by the T...

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  8. The sky wave propagation is suitable for radiowaves of frequency

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  9. The polarisation of an electromagnetic wave is determined by

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  10. Frequencies in the UHF range normally propagate by means of:

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  11. An antenna is a device

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  12. The frequency of signals up to 1.5 MHz can be propagated using

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  13. Space wave propagation is used in (a) microwave communication (b) ...

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  14. The Ionosphere reflects the

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  15. Which of the following is not a transmission media used in communicat...

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  16. In which frequency range, space waves are normally propagated?

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  17. While tuning in a certain broad cast station with a receiver, we are a...

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  18. If the frequency of E.M radiations is halved then the energy of EM ra...

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  19. The frequency of a wave propagating in D-region having refractive inde...

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  20. The ground wave communication cannot be occur above a distance of

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