For sky wave propagation of a 10 MHz signal, what should be the minimum electron density in the ionosphere?

For sky wave propagation of a 10 MHz signal, what should be the minimu

1.	For sky wave propagation of a 10 MHz signal, what should be the minimum electron density in the ionosphere?
Answer» SOLUTION :CRITICAL FREQUENCY, `f_c=qsqrtN=f_c^2/81` `(10xx10^6)/81 = 1.2xx10^12m^-3`

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For sky wave propagation of a 10 MHz signal, what should be the minimum electron density in the ionosphere?

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