played in the Second World War. People hailed it then as "Our

But even in its earliest years, as it was helping win the

war, radar proved to be more than an expert enemy locator. Radar

technicians, doodling away in their idle moments, found that they

could focus a radar beam on a marshmallow and toast it. They also

Such was the beginning of microwave cooking. The very same

energy that warned the British of the German Luftwaffe invasion

and that policemen employ to pinch speeding motorists, is what

many of us now have in our kitchens. It's the same as what

carries long distance phone calls and cablevision.

Hitler's army had its own version of radar, using radio

waves. But the trouble with radio waves is that their long

wavelength requires a large, cumbersome antenna to focus them

into a narrow radar beam. The British showed that microwaves,

with their short wavelength, could be focussed ina narrow beam

with an antenna many times smaller. This enabled them to make

more effective use of radar since an antenna could be carried on

aircraft, ships and mobile ground statio

oven simply because their outside gets much hotter than their

molecules billions of times a second, and this rapid movement

exposure to electromagnetic radiation increases by several

burners and are converted to heat when they strike

off the oven walls and are absorbed by water molecules in the

Some topics in this essay:
German Luftwaffe, University Equipping, Protection Agency, University Guelph, Miracle Ally, Microwaves Body, , infrared rays, water molecules, War People, narrow beam, air inside, radio waves, radar range, agitate water molecules, agitate water, cook outside, microwaves agitate, electromagnetic radiation, absorbed water molecules, forms electromagnetic energy, microwaves agitate water,