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You might remember the heroic role that
newly-invented radar played in the Second World
War. People hailed it then as "Our Miracle Ally".
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 popped popcorn with it. 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......

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Approximate Word Count: 1227
Approximate Pages: 5 (250 words per double-spaced page)

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