If the average density of electrons in an ionosphere is given by \( latex 6 \times 10^{10} \) electrons per \( latex \text{meter}^3 \), then calculate plasma frequency.
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Another Explanation (5): The plasma frequency (fp) is given by:
\(f_p = 9 \times \sqrt{N_e}\)
where \(N_e\) is the electron density in electrons per cubic meter. Given \(N_e = 6 \times 10^{10} \text{ m}^{-3}\),\(f_p = 9 \times \sqrt{6 \times 10^{10}} \approx 9 \times 2.45 \times 10^5 \approx 2.205 \times 10^6 \text{ Hz}\)
Therefore, the plasma frequency is approximately 2.205 MHz.