Technician exam question T3B05
Subelement T3, RADIO WAVE PROPAGATION· Group T3B
What is the relationship between wavelength and frequency?
- A.Wavelength gets longer as frequency increases
- B.Wavelength gets shorter as frequency increases (correct answer)
- C.Wavelength is constant at all frequencies
- D.Wavelength and frequency increase as path length increases
WhyWavelength gets shorter as frequency increases. Since a radio wave travels at a fixed speed (the speed of light) in free space, and wavelength times frequency equals that speed, the two must move in opposite directions: as frequency goes up, each cycle has less time to complete, so the wave physically travels a shorter distance per cycle, meaning wavelength gets shorter, answer B. A states the reverse relationship, C wrongly claims no relationship exists, and D introduces path length, which has no bearing on the frequency-wavelength relationship.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2026-2030 NCVEC Element 2 pool (public domain); the explanation above is original writing, see our methodology.
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