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<p>the <a href="page.php?w=plasma_frequency">plasma frequency</a>. Its electric field strength falls off at a rate of e<sup>-?d</sup>/?d in the direction of propagation along the interface due to two-dimensional geometrical field spreading at a rate of 1/?d, in combination with a frequency-dependent exponential attenuation (?), which is the terrestrial transmission line dissipation, where ? depends on the medium's conductivity. Arising from original analysis by <a href="page.php?w=Arnold_Sommerfeld">Arnold Sommerfeld</a> and <a href="page.php?w=Jonathan_Zenneck">Jonathan Zenneck</a></p><p>
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