Xref: utzoo rec.autos:15746 sci.electronics:5318 misc.consumers:8911
Path: utzoo!attcan!uunet!ispi!jbayer
From: jbayer@ispi.UUCP (Jonathan Bayer)
Newsgroups: rec.autos,sci.electronics,misc.consumers
Subject: Re: Correct Terminology (was Re: Radar Detectors (Ka band) ...)
Keywords: radar, laser, lidar?
Message-ID: <470@ispi.UUCP>
Date: 23 Feb 89 15:53:11 GMT
References: <603@icus.islp.ny.us> <7944@netnews.upenn.edu> <1895@tank.uchicago.edu> <5632@homxc.ATT.COM>
Reply-To: jbayer@ispi.UUCP (Jonathan Bayer)
Organization: Intelligent Software Products, Inc.
Lines: 25

In article <5632@homxc.ATT.COM> h16@homxc.ATT.COM (D.JACOBOWITZ) writes:
>In article <1895@tank.uchicago.edu>, kean@tank.uchicago.edu (Keane Arase) writes
>> 
>> The laser beam will spread 3.5 feet in 1000 ft (1/5 mile!) and register
>> your speed in 1/4 to 1/2 second.  (I know *I* don't have reaction
>
>A laser will spread 3.5 feet in 1/5 mile?
>Are you sure?
>That doesn't sound like coherent light.


Whether a laser spreads out or not is irrelevent.  Coherent light refers
to the wavelengths and wavepatterns.  Think of how they are trying to
get fusion reactors developed.  They have huge lasers which they then
focus through a lens onto a tiny pinpoint, hoping to force enough energy
onto that pinpoint to force it to implode and fuse, thereby releasing
energy.

JB

-- 
Jonathan Bayer			      Beware: The light at the end of the
Intelligent Software Products, Inc.	      tunnel may be an oncoming dragon
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