DONT COPY ANSWER FROM CHEGG ,DO YOUR WORK PLEASE,imag clear , if you cant see it
ID: 2291836 • Letter: D
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DONT COPY ANSWER FROM CHEGG ,DO YOUR WORK PLEASE,imag clear , if you cant see it , make a galsses
The ionosphere consists of several layers of plasma, with the lowest layer approximately 80 km above the surface of the Earth. At low frequencies in the MHz range both the Earth and the ionosphere are good conductors. Thus, the ionosphere and the Earth form a natural parallel-plate waveguide. What is the range of frequencies for which only the dominant mode (overall) propagates? What is the range of frequencies for which only the dominant mode among TE modes propagates? If the operating frequency is 1 MHz (AM), what modes can propagate? (a) (b) (c)Explanation / Answer
Signals can progress along a warehouse using a no of modes.
However dominant mode is one that has lowest cut off frequency and for rectangular waveguide this is TE10 IE transverse electric means perpendicular to the propagation of light.
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