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In short wave communication waves of which of the following frequeuncies will be reflected back by the ionospheric layer having electron density `10^(11)per m^(3)`?A. 2 MHzB. 10 MHzC. 12 MHzD. 18 MHz |
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Answer» Here, `N=10^(11)` per `m^(3)`, As `v=9sqrt(N)=9sqrt(10^(11))` `=9xx3.16xx10^(5)=28.3xx10^(5)=2.83xx10^(6)Hz` `-2.83 MHz` So waves of frequency 2 MHz will be reflected back by the ionosphere layer. |
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