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If sky wave with a frequency of 60 MHz is incident on D- region at an angle of `30^@`, then find the angle of refractive.A. `15^(@)`B. `30^(@)`C. `60^(@)`D. `45^(@)` |
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Answer» `v=50 MHz=50xx10^(6)Hz, i=30^(@)`, `N=10^(9)m^(-3)` `mu=sqrt(1-(81.45N)/(v^(2)))=sqrt(1-(81.45xx10^(9))/((50xx10^(6))))=1` `mu=(sin i)/(sin r)` or `1=(sin i)/(sin r)` or `sin i=sin r` or `r=i=30^(@)` |
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