What is the refractive index of E-layer when the electromgnetic wave frequency is 50 MHz and the number density of electrons is `5xx10^(5)` electrons is `5xx10^(5)` electrons`//cm^(3)` ?

Options

A. 0-992
B. 1-015
C. 43481
D. 1-000

Explanation

Hre, `N=5xx10^(5)` electrons//cm^(3)`
`=5xx10^(5)xx10^(6)` electorns`//m^(3)`
`=v50 MHz=50xx10^(6)`Hz
`mu=sqrt(1-(81.45N)/v^(2))=sqrt(1-(81.45xx5xx10^(5)xx10^(6))/((50xx10^(6))^(2)))`
`sqrt(1-(81.45xx10^(-3))/(5))`
`=sqrt(1-0.01629)=sqrt(0.98371)=0.992`