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← ScienceWhich standing wave outcome occurs when adjusting microwave cavity dimensions?
A)Resonant frequency spectrum alters position✓
B)Antinode placement maintains uniformity always
C)Waveguide impedance never changes slightly
D)Node number always reduces continuously
💡 Explanation
Changing the cavity's dimensions shifts resonant frequencies because alterations modify the allowed wavelengths leading to differing standing wave patterns governed by wave interference; therefore, the frequency spectrum alters, rather than nodes and antinodes remaining fixed in the existing standing waves.
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