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Long distance short-wave radio broadcast...

Long distance short-wave radio broadcasting uses

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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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?

RESONANCE-COMMUNICATION SYSTEMS-Exercise 2
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  2. Which of the following is not transducer?

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  3. Long distance short-wave radio broadcasting uses

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  7. Amplitude modulation is used for broad casting because

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  8. Range of frequencies allotted for commercial FM radio broadcast is

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  9. A sept index fibre has a relavitive refractive index of 0.88%. What is...

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

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  11. If mu and mu(2) are the refractive indices of the materials of core an...

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

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  13. For television broadcasting, the frequency employed is normally

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  14. The ratio waves of frequency 300 MHz to 3000 MHz belong to

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  15. An antenna behaves as resonant circuit only when its length is

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  16. The electromagnetic waves of frequency 2 MHz and 30 MHz are

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  17. An oscillator is producing FM waves of requency 2kHz with a variation ...

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  18. The phenomenon by which light travels in an optical fibres is

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  19. Television signal on earth cannot be recevied at distances greater th...

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