If the average density of electrons in an ionosphere is given by \(latex/6 \times 10^{11}\) electrons per meter\(latex/^3\), then calculate plasma frequency.
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Another Explanation (5): The plasma frequency (fp) is given by:
fp = 9√ne
where ne is the electron density in electrons per cubic meter. Given ne = 6 × 1011 m-3,fp = 9√(6 × 1011) ≈ 7 MHz