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    Question

    Which of the followings transmitted as wave,which

    penetrate food and are then absorbed and convert to heat.
    A Microwave frequency Correct Answer Incorrect Answer
    B Radio frequency Correct Answer Incorrect Answer
    C Infrared Correct Answer Incorrect Answer
    D All of the above Correct Answer Incorrect Answer

    Solution

    Dielectric (microwave and radio frequency) energy and infrared (or radiant) energy are two forms of electromagnetic energy. They are both transmitted as waves, which penetrate food and are then absorbed and converted to heat.

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