Question

Under which condition a food item which contains water molecules heats up efficiently?

• A. Microwaves are meant for heating.
• B. Infrared waves are used in microwave oven.
• C. The frequency of microwave matches with the resonant frequency of the water molecules.
• D. There is no relation between the frequency of a microwave and the resonant frequency of the water molecules.

Answer 1

The correct option is C The frequency of microwave matches with the resonant frequency of the water molecules.

A microwave is an electromagnetic wave, and when the frequency of the waves matches with the resonant frequency of water molecules it results in heat generation due to greater amplitude vibrations. This way the food gets heated up efficiently.