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← ScienceWhich outcome results when polarized molecules in microwave dielectric heating experience rapid field reversals?
A)Uniform energy absorption throughout sample
B)Thermal runaway in high loss regions✓
C)Wavelength shortening at sample boundaries
D)Suppressed molecular rotational diffusion
💡 Explanation
When a polarized molecule experiences rapid microwave field reversals energy absorption occurs via dielectric losses, resulting from molecular friction, because the molecule attempts to realign with oscillating electric field leading to heat generation, with high-loss regions heating faster. Therefore thermal runaway results, rather than uniform absorption, wavelength shortening, suppressed diffusion which occur under significantly varied conditions.
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