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← ScienceDuring microwave communication, which mechanism introduces signal fading due to atmospheric conditions?
A)Multipath interference from refractive index variations✓
B)Ionospheric absorption during peak solar activity
C)Tropospheric ducting causing signal trapping
D)Fresnel zone obstruction by ground clutter
💡 Explanation
During microwave communication, variations in atmospheric refractive index cause multipath interference because signals travel different distances and phases combining destructively leading to signal fading. Therefore multipath fading results, rather than absorption, ducting, or zone obstruction which require different atmospheric conditions.
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