Which effect occurs when microwave radiation interacts with strongly polar liquids, causing dielectric heating?

💡 Explanation

When exposed to microwave radiation, polar liquids experience dielectric heating, occurring due to molecular rotational excitation because oscillating electric fields align and realign molecules, generating thermal energy. Therefore rotational excitation results, rather than electronic transition, NMR alteration, or vibrational frequency shift which require different energy levels or mechanisms.

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