🚀 go-pugleaf

>Heard this from a friend...

>Date - 1980.  Person is driving a '79 Monte Carlo through town.  All
>of a sudden the windshield cracks.  It was not caused by a kid
>throwing rocks because the crack was rather straight.  Anyway the
>person pulls off the road and a cop pulls up a few seconds later.  The
>cop had been using radar and the windshield had a built in antenna
>wire.

>Could radar hitting the wires in the glass cause them to resonate so
>much that the glass cracked?


   Yeah, I had a friend who had that _exact same thing_ (well, almost
:->) happen to him. He was driving along, went around a corner, and his
windshield cracked... into 4 separate pieces!  Apparently some radar gun
assembler had put a diode in the wrong place, and changed the normal
sinusoidal output into a pseudo-square wave.
    The spot that my friend drove around was a popular corner for cops
to hang out at, so when two different highway patrolmen tried to clock
the same guy, both with faulty guns, the waves _just happened_ to be at
right angles.
    Which caused his windshield to split in four distinct parts...each
taking a quarter of the original space.
    When both cops stopped behind the guy, they apologized for the
problem, but claimed that they couldn't be held responsible, because his
windshield had antenna wire imbedded in it.  When he told him that he
couldn't believe it, they showed him some pictures of other cars, where
the windshield had broken, and even melted due to resonance from the
radar waves.
    Even scarier, cars that use radar detectors and have the radio
turned on to certain A.M. stations have been known to crack ALL of the
windows in the car.  Foretunately, most of us haven't noticed this,
because it doesn't happen unless the car happens to be driving over a
grooved road, so that the car resonates with the radio waves.

    --D. Hollingsworth

P.S. I just wondered if someone could tell me how to use this process to
produce a microwave freezer.

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|David E. Hollingsworth    |"D over mu = kT over q...notice that this is
true   |
|starpath@ATHENA.MIT.EDU   |because it rhymes both ways! mu over D = q
over kT)"|
|96070-2274 <-MR. ZIPPY #9 |  -Prof. Fonstad, Semiconductor Devices (I
think)   |
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