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. `18 MHz`B. `10 MHz`C. `12 MHz`D. `2 MHz`

In short wave communication waves of which of the following frequeunci

1.	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. `18 MHz`B. `10 MHz`C. `12 MHz`D. `2 MHz`
Answer» Correct Answer - D The perceived frequency of sky wave for reflection from an ionospheric layer is `v_(c)=9n^(1/2)` where `n` is the number density of electrons `//m^(3)`. Given, `n=10^(11)//m^(3)` `:. v_(c)=9xx(10^(11))^(1/2)=2.8 MHz~~2MHz` do not satisfy this condition.

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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. `18 MHz`B. `10 MHz`C. `12 MHz`D. `2 MHz`

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