The wave length of a wave in a waveguide is
- A. is greater than in free space
- B. depends only on the waveguide dimensions and the free-space wavelength
- C. is inversely proportional to the phase velocity
- D. is directly proportional to the group velocity
Answer: A. is greater than in free space
Explanation: Guide wavelength λg = λ0/√(1−(λ0/λc)²) is always greater than the free-space wavelength.