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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 kcs^(-1) `

B

` 300 kcs^(-1) `

C

`329.5 kcs ^(-1)`

D

`350 kcs^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
C
Electron density of D-region is ` 10^(-3)`
` mu=1-(81.45 N)/( v^(2))`
Given refractive index ,` mu =0.5 `
` implies 0.5 sqrt(1-(81.45xx 10^(9))/(v^(2)))`
` implies v=329.5 kcs^(-1)`
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