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← ScienceWhich mechanism explains why radio wave signal weakens rapidly behind a large metal building?
A)Diffraction around sharp edges
B)Faraday cage attenuation effect✓
C)Doppler shift signal modification
D)Interference from ground reflections
💡 Explanation
When radio waves encounter a conductive enclosure, the Faraday cage effect causes electric fields to induce currents that cancel out the interior field due to electromagnetic induction. Therefore, a rapid signal drop occurs inside a building rather than through pure diffraction, Doppler effects related to motion or ground reflection alone.
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