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← ScienceWhich mechanism explains the energy loss from a microwave pulse propagating through humid air?
A)Molecular rotational absorption✓
B)Atmospheric ionization scattering
C)Rayleigh scattering from particulates
D)Faraday rotation in magnetic fields
💡 Explanation
When a microwave pulse travels through humid air, molecular rotational absorption occurs because the water molecules have resonant frequencies in the microwave spectrum, causing them to absorb energy from the wave. Therefore, energy is lost from the pulse, rather than by scattering or magnetic effects which require different atmospheric conditions.
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