This is usually stated with a more reasonable precision as 3.00 × 10 8 m/s. Convergent of the spline functions for delay dynamic Convergent of the spline functions for delay dynamic system. This is meant to serve as a general guide, as rock types are classified by a range of physical properties values which can lead to order of magnitude differences in skin depth. The speed of light in a vacuum is defined in the SI system to be 299,792,458 m/s (about a billion km/h). The table below shows skin depths for certain rocks at various frequencies. Radio waves cannot penetrate metal they are reflected instead.
However, approxmations exist in the quasi-static and wave regimes. Try to choose a location that is central to the area being served. For a general case, the skin depth can be considered a fairly complicated function. Since \(\beta\) depends on the frequency and the physical properties of the media, so does the skin depth.
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