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The maximum frequency of transmitted rad...

The maximum frequency of transmitted radio waves above which the radio waves are no longer reflected back by ionosphere is (N = maximum electron density of ionosphere, g = acceleration due to gravity)

A

gN

B

`gN^(2)`

C

`gsqrt(N)`

D

`g^(2)N^(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
Critical frequency is given by
`f_(C)=gsqrtN`.
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Knowledge Check

  • The waves which are reflected back to the earth by ionosphere is

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    ground wave
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    space wave
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    ground waves
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    `10^6//m^3`
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    `1.23xx10^12//m^3`
    D
    `1//9xx10^6//m^3`

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