Thursday, September 26, 2013

How a Microwave works . . .

How a Microwave works . . .
The heating efficiency of a microwave oven is due to the fact that water strongly absorbs microwaves.
Most food contains considerable liquid water, and that explains why the microwaves bouncing around inside a microwave oven are quickly absorbed by any food inside. The energy in the microwaves is then converted into heat. 
Really is it?
In 1946 Dr. Percy Spencer, an engineer at Raytheon Laboratories was working with a magnetron tube which produces microwaves. He had a candy bar in his pocket and when he went to eat it he discovered that it had melted. But there was no heat source that could have melted the candy bar. The only thing he could think of was the magnetron tube. He tried placing a few kernels of popping corn near the tube and a few seconds later it started popping. Can you say WOW!!!
He then aimed the tube at an egg and a few minutes later the egg exploded. The result of this was the first microwave oven called the Amana Radar Range. It was introduced in 1977.
And the rest is history.

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