jsaepuru

It is thorny and often discussed question, isn't it? Does a freely
falling charge radiate?

Let us ask another question. Suppose a charge is held fixed in a field
of gravity.

An observer not accelerated in respect to the charge should see no
radiation whether the observer is nearby or far away.

Would a freely falling observer observe radiation from charges held
fixed?

pmb

It detectability of the radiation depends on the relative acceleration of
observer and charge. I've gathered the research on this subject and posted
the relavent parts here - http://www.geocities.com/physics_world/falling_charge.htm

Yes.

Pmb

dlzc

Dear Jaak Suurpere


Like to a planet? A Van deGraaf ball, perhaps...

EM radiation, correct, but electrostatic field would be something else again.

A charge does radiate EM when accelerated uniformly. Presumably this could
be a source of some *very* long wave EM from a Van deGraaf. Wouldn't that
be an interesting experiment? And the observer wouldn't have to be in
freefall either, I don't think...

You are not looking for the production of a magnetic field, but the
production of EM radiation, right?

David A. Smith

waitedavid137

That crank site is wrong. For the correct answer see-
http://www.geocities.com/zcphysicsms/chap7.htm#BM7_2

johns

Isn't the question really .. how does the observer "see"
the radiation. If I were freely falling past an entire
power plant, I would not "see" any radiation at all.
However, assuming the power plant created an extended
electro-something-or-other field, and I was a WIRE
in a closed loop, I would certainly "see" an induced
something-or-other in my coil. So, another question in
return ... If you buy in to all the jargon, aren't you
opening yourself to elementary mistakes in theory?
And, how much of "theory" is phrased as if it were
some mystical unknown ? Your question involves a
"charge". A charge has a potential field around it.
Anything passing through that potential field will "see"
an effect of some kind. So, how could you rephrase
your question and make sense? If I were freefalling
past a light bulb, would it radiate ? If I accelerated
past a light bulb, would it radiate ? That is about the
order of what I constantly read on this newsgroup.
What is the real question you are asking?

johns

dlzc

Dear johns:

I think the OP is refering to "synchrotron radiation". This is more or
less spontaneous emission of EM radiation when a charge is accelerated.
And by EM I do mean light... x-rays, UV, all sorts of stuff.

David A. Smith

gauge5

Warning - the above link to zcphysics is to a crank web site. Too many
errors and bogus notions to be corrected in one or several post.

The author - davy waite - has the very poor habit of claiming there
are errors when none exists. he proves this time and time again by
failing to prove his claims.

Use waite's link with extreme caution.

However - http://www.geocities.com/physics_world/falling_charge.htm
contains ONLY peer reviewed material from the physics literature - all
of which come to the same conclusion.

Mr. Pmb - waite's relativity teacher

waitedavid137

You have yet to find an actual error with modern relativity. You only think you have.

That is a lie. Your wacky misinterperetations and misquotes of what others have
done are not peer reviewed.

gauge5

I never said there was an error in relativity. I said that your site
is bogus. That's due to your poor educations

More lies waite? You really need to stop this. Get back on your
medication or seek help from a professional - ask pew if you can talk
to his wife about your pathological liying.

Unless you're man enough to prove this so-called "claim" that I'm
misquoting. You can't. Any attempt will show just what a moron/liar
you are and you know that.

Grow up waite

Mr. Pmb - waite's relativity teacher