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← ScienceWhich risk increases with the application of higher frequency electromagnetic waves in dielectric heating of foods?
A)Enhancement of localized thermal runaway
B)Reduction in the chemical reaction rates
C)Decreased penetration depth within sample✓
D)Increased energy coupling efficiency uniformly
💡 Explanation
When frequency increases in dielectric heating, the skin effect causes electromagnetic waves to penetrate less deeply because shorter wavelengths interact more with the surface. Therefore decreased penetration results rather than thermal runaway, altered reaction rates or uniform heating distribution; these are dependent on material and longer exposure.
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