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E3A10:What determines the speed of electromagnetic waves through a medium?

E3A10E3A

What determines the speed of electromagnetic waves through a medium?

Direct answer summary (2024-2028 NCVEC pool)

The official correct answer for E3A10 is The index of refraction.

The key fact is The index of refraction. 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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More questions in E3A

E3A01What is the approximate maximum separation measured along the surface of the Earth between two stations communicating by EME?E3A02What characterizes libration fading of an EME signal?E3A03When scheduling EME contacts, which of these conditions will generally result in the least path loss?E3A04In what direction does an electromagnetic wave travel?E3A05How are the component fields of an electromagnetic wave oriented?E3A06What should be done to continue a long-distance contact when the MUF for that path decreases due to darkness?