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The frequency of a wave propagating in D...

The frequency of a wave propagating in D-region having refractive index of 0.5 is

A

`420` kc/s .

B

300 kc/s.

C

`207.33` kc/s.

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
Electron density of D-region is `10^(9) m^(-3)`
` mu = sqrt(1-(81.45N)/v^(2))`
` 0.5 = sqrt(1-(81.45xx10^(9))/v^(2))`
` :. v = 207 .33 kc//s`
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