Microwave ovens heat food by creating microwave electromagnetic radiation that i

Question

Microwave ovens heat food by creating microwave electromagnetic radiation that is absorbed by water molecules in the food. Any material that does not have water in it will not absorb the radiation and will not get hot. Metals reflect the microwaves from their surfaces and disrupt the operation of the oven. Some Australians heat water in microwave ovens to make tea. What is the minimum number of microwave photons with a wavelength of 3.31 mm that will have to be absorbed by a 101.00 gram sample of water to heat it from 25

Explanation / Answer

First of all your understanding of work of a microwave is incorrect. The electromagnetic generator of the microwave develops electromagnetic fluctuations of the same frequency as fluctuation of molecules of water ,thereby dispersing and warming up them. That's all. And as to time of a warming up that it depends on capacity of the generator. On the average 250 gramme of water will begin to boil in 4-6 minutes.

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