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E3B04:What are “extraordinary” and “ordinary” waves?

E3B04E3B

What are “extraordinary” and “ordinary” waves?

Direct answer summary (2024-2028 NCVEC pool)

The official correct answer for E3B04 is Independently propagating, elliptically polarized waves created in the ionosphere.

The key fact is Independently propagating, elliptically polarized waves created in the ionosphere. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.

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