car radio

Assuming the car antenna is always up, will whether or not the radio is turned on and tuned into a station affect the amount of radio waves or other EMFs that are attracted to the car?  Obviously I don't know much about how radios work.

No, it won't. EM waves always travel in a straight line, no matter where they end up. It's a common misconception that they can be attracted to certain objects.

Rolf


On Oct 1, 2012, at 7:04 PM, russel395 wrote:

> Assuming the car antenna is always up, will whether or not the radio is turned on and tuned into a station affect the amount of radio waves or other EMFs that are attracted to the car? Obviously I don't know much about how radios work.
>
>



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Thanks Rolf.  Is it also false then that lightning will be attracted to certain locations or objects?

--- In [hidden email], Rolf Muertter <muertter@...> wrote:

I would say that, strictly speaking, it is false. Of course, lightning is not an EM wave, it's an electric current flowing between the bottom of a cloud and the ground. The current takes the path of least resistance, which is why it usually flows from the bottom of the cloud to the highest point in the area. Sometimes the bottom of the cloud is positively charged, in which case the lightning goes from the ground to the cloud. Of course, some objects are more likely to be hit by lighting: good conductors that are pointy and closest to the cloud. On a charged conductor, the electric field is the highest where the radius is the smallest, and that is where the air is most likely to become ionized.

Rolf


On Oct 2, 2012, at 12:35 PM, russel395 wrote:



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ironically there are many sited incidents of people getting hit by  
lightning while using their mobile... that will teach them a lesson !
 
puk
 
 
In a message dated 03/10/2012 05:44:27 GMT Daylight Time,  
[hidden email] writes:

I would  say that, strictly speaking, it is false. Of course, lightning is
not an EM  wave, it's an electric current flowing between the bottom of a
cloud and the  ground. The current takes the path of least resistance, which
is why it  usually flows from the bottom of the cloud to the highest point in
the area.  Sometimes the bottom of the cloud is positively charged, in
which case the  lightning goes from the ground to the cloud. Of course, some
objects are more  likely to be hit by lighting: good conductors that are pointy
and closest to  the cloud. On a charged conductor, the electric field is
the highest where the  radius is the smallest, and that is where the air is
most likely to become  ionized.

Rolf


On Oct 2, 2012, at 12:35 PM, russel395  wrote:

> Thanks Rolf. Is it also false then that lightning will be  attracted to
certain locations or objects?
>
> --- In  [hidden email], Rolf Muertter <muertter@...> wrote:
>  >
> > No, it won't. EM waves always travel in a straight line, no  matter
where they end up. It's a common misconception that they can be  attracted to
certain objects.
> >
> > Rolf
> >  
> >
> > On Oct 1, 2012, at 7:04 PM, russel395  wrote:
> >
> > > Assuming the car antenna is always up,  will whether or not the radio
is turned on and tuned into a station affect the  amount of radio waves or
other EMFs that are attracted to the car? Obviously I  don't know much about
how radios work.
> > >
> > >  
> >
> >
> >
> > [Non-text portions of  this message have been removed]
> >
>
>  



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