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In which frequency range, space waves ar...

In which frequency range, space waves are normally propagated?

A

`HF`

B

`VHF`

C

`UHF`

D

`SHF`

Text Solution

Verified by Experts

The correct Answer is:
c
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Ground/ surface wave propagation is a mode of propagation in which the signal wave glides over the surface of earth, while going from transmitter to receiver. In this mode, there is a loss of power (i.e., attenuation) of signal wave due to diffraction and absorption of signal wave energy by ground. The attenuation of ground / surface wave signal increases very rapidly with the increase in its frequency. Therefore, the ground/ surface wave propagation is not suitable for the propagation of high frequency signal wave and for very long range communication. Read the above passage and answer the following questions: (i) What is the frequency range of a signal wave employed for the ground wave propagation? (ii) For what purpose the ground wave propagation is used? (iii) What does the study of ground wave propagation imply in day to day life?

Knowledge Check

  • Frequency ranges for micro waves are:

    A
    `3xx10^(9)` to `3xx10^(4)Hz`
    B
    `3xx10^(13)` to `3xx10^(9)Hz`
    C
    `3xx10^(14)` to `3xx10^(9)Hz`
    D
    `3xx10^(11)` to `3xx10^(9)Hz`

  • Frequencies in the UHF range normally propagate by means of

    A
    ground waves
    B
    sky wave
    C
    surface waves
    D
    space waves

  • Frequencies in the UHF range normally propagate by means of

    A
    ground waves
    B
    sky waves
    C
    surface waves
    D
    space waves

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