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← ScienceWhich risk increases when an unshielded waveguide propagates microwaves?
A)Radiation leak causes signal loss✓
B)Increased internal resistance causes heating
C)Internal reflections distort data stream
D)Impedance mismatch damages source
💡 Explanation
Radiation leakage increases due to poor confinement; this is caused by electromagnetic leakage through discontinuities in the waveguide's structure. Therefore, interference occurs because electromagnetic fields are not contained. Heating is related resistance, not shielding; reflections and impedance have different failure modes, rather than emission.
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