[Mgs] "black plate cars"

Max Heim max_heim at sbcglobal.net
Mon Nov 5 10:20:48 MST 2007


Probably not. "Retro-reflective" plates use tiny embedded glass beads, so
that a significant propoportion of any light that hits them is reflected
directly back at the source, regardless of angle. This is different than a
mirror, for example, which will redirect the beam depending on the angle.



on 11/5/07 7:01 AM, Bob Howard at mgbob at juno.com wrote:

> David,
>    Is the reflected laser beam reflected sufficiently away from the laser
> gun's receiver if the licence plate is tilted down a few degrees, or
> dispersed if the licence plate is bowed?
> Bob
> 
> 
>  But like I said, their
>> effectiveness is dubious.  Here in Washington, the cops do
>> aim their laser guns at the license plates, which are
>> retro-reflective and send the pulse right back.  If you
>> aim at any other part of the car, the beam will scatter
>> which is why you can detect laser guns over hills and
>> around corners with a laser-compatible radar detector if
>> the conditions are right.  I've done so with my Valentine I
>> many times.
>> 
>> 
>> 
>> David Breneman         david_breneman at yahoo.com


--

Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the primer red one with chrome wires


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