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From: frag on 2 Aug 2010 16:59
In article <i34qee$bbi$1(a)news.eternal-september.org>,
gwilbyREMOVE(a)eekafreek.com says...
>
> On 2010-08-01 22:32:21 +0100, wessie <putmynamehere(a)tesco.net> said:
>
> > Gavin <gwilbyREMOVE(a)eekafreek.com> wrote in news:i34o2i$265$1(a)news.eternal-
> > september.org:
> >
> >> Funny again - but tell me, and I have noticed this before, why do the
> >> light flash on all the cars they test?
> >>
> >> Or is my TV on its way out.
> >>
> >
> > from past show it seems to be the signal that the car is about to overtake
> > the camera vehicle
>
> Hmmm, Im not sure - its a very rapid flash, I noticed it first in the
> series a couple of years ago when they drove the Ford GT over that big
> bridge in France.
>
> The tail lights flashed rapidly.

LED tail lights.

They use PWM to make them shine at half brightness, i.e. they go On-Off-
On-Off vewwy vewwy fast, and On-On-On-On when your foot is on the brake.

And as your TVs picture is refreshing 25 times a second, its the
interference pattern.

--
frag

MicroPlanet Gravity Newsreader V3.0 http://mpgravity.sourceforge.net/
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