Extra exam question E3B04
Subelement E3, RADIO WAVE PROPAGATION· Group E3B
What are “extraordinary” and “ordinary” waves?
- A.Extraordinary waves exhibit rare long-skip propagation, compared to ordinary waves, which travel shorter distances
- B.Independently propagating, elliptically polarized waves created in the ionosphere (correct answer)
- C.Long-path and short-path waves
- D.Refracted rays and reflected waves
Why"Extraordinary" and "ordinary" waves are the two independently propagating, elliptically polarized components a radio wave splits into inside the ionosphere. "Extraordinary" and "ordinary" waves are the two independently propagating, elliptically polarized components that a radio wave splits into when it enters the ionosphere, a consequence of Earth's magnetic field acting on the ionized layer, each following a slightly different path, answer B. They aren't a description of skip distance, aren't the same thing as long-path versus short-path routes, and aren't simply refracted versus reflected rays, those are different propagation concepts.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2024-2028 NCVEC Element 4 pool (public domain); the explanation above is original writing, see our methodology.
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