Some say free particles can't absorb light. This is nonsense. Shouldnt
free particles be free to absorb any amount of energy? Can't light
transfer its energy/momentum to unbound matter?
And why not?

Maybe the real problem in turn is radiation from the free particle.

This is America. People and free particles are free to do whatever
they choose. God bless free will.

Nick wrote:
Some say free particles can't absorb light.

Right. They cannot.


Shouldnt
free particles be free to absorb any amount of energy?

Why? Just because you want them to? Why should your wishes govern the
universe?


Can't light
transfer its energy/momentum to unbound matter?

No. It is not possible to do that and conserve both energy and momentum.


Note that free charged particles can _scatter_ light. That's completely
different from absorbing it.


Tom Roberts

Nick wrote:
Some say free particles can't absorb light. This is nonsense. Shouldnt
free particles be free to absorb any amount of energy? Can't light
transfer its energy/momentum to unbound matter?
And why not?

Maybe the real problem in turn is radiation from the free particle.

The EM fields of accelerator cavity are in every respect
*light*. A charged particle is moving faster after
transiting one of the cavities.

As the particle bunch passes through the tube it is unaffected (the
tube acts as a (Click link for more info and facts about Faraday cage)
Faraday cage), while the frequency of the driving signal and the
spacing of the gaps between electrodes is designed so that the maximum
voltage differential appears as the particle crosses the gap. This
accelerates the particle, imparting energy to it in the form of
increased velocity. At speeds near the speed of light the incremental
velocity increase will be small, with the energy appearing as an
increase in the mass of the particles. In portions of the accelerator
where this occurs the tubular electrode lengths will be almost
constant.
http://www.absoluteastronomy.com/enc...ccelerator.htm


Sue...

Sue... wrote:


The EM fields of accelerator cavity are in every respect
*light*. A charged particle is moving faster after
transiting one of the cavities.

As the particle bunch passes through the tube it is unaffected (the
tube acts as a (Click link for more info and facts about Faraday cage)
Faraday cage), while the frequency of the driving signal and the
spacing of the gaps between electrodes is designed so that the maximum
voltage differential appears as the particle crosses the gap. This
accelerates the particle, imparting energy to it in the form of
increased velocity. At speeds near the speed of light the incremental
velocity increase will be small, with the energy appearing as an
increase in the mass of the particles. In portions of the accelerator
where this occurs the tubular electrode lengths will be almost
constant.
http://www.absoluteastronomy.com/enc...ccelerator.htm


Sue...

Also it looks like the EM fields of accelerator cavity are in every
respect
*the coolest thing in the world*.
If there's a better piece of gear than a particle accelerator...is
there?

p

Nick wrote:
Some say free particles can't absorb light. This is nonsense.

IMHO the good thing in your post is that you are asking questions!

to ask a good question is the first condition to start getting
answers

the bad thing is that right at the beginning you say 'nonsense'
because at that moment you started to give 'answers'

now why do you think that any particle at any condition must be able to
absorb light
do you imagine a particle as sort of a big pot that can be filled with
water??....

you have to think about light and its properties;
it has a certain frequency and therefore only a certain amount of
energy
and momentum
and that is not all the story-- now we have the particle
of which you expect to 'swallow anything'
it has as well its 'natural frequency' that plays a big roll

while you go to a restaurant
are you able to stiff in yourself anything that is offered to you?

and while your stomach if full are yo able to add more on it ??
-----


Shouldnt
free particles be free to absorb any amount of energy? Can't light
transfer its energy/momentum to unbound matter?
And why not?

see my above metaphors.

Maybe the real problem in turn is radiation from the free particle.

here i tend to agree with you
if we go on with my gastronomic metaphor:
you probably heared in the history of corrupted Rome
that of their Big wild 'parties' they used to stuff themselves with
food
the vomit and go on stuffing themselves......

IE only if you unload yourself first- you have room to reload.

bottom line
things are much more complicated than it looks like
and let me tell you a secret hoping no one will hear it:
there is no one in this universe that *really knows it to the scratch*
though the pompous pose that 'establishment scientists pose!!
they will stuff your had with mathematical formulas
while behind that there is still -- big ignorance
only those people do not realize how ignorant they still are !!

ATB
Y.Porat
-----------------

----------

------------

platopes wrote:
Sue... wrote:


The EM fields of accelerator cavity are in every respect
*light*. A charged particle is moving faster after
transiting one of the cavities.

As the particle bunch passes through the tube it is unaffected (the
tube acts as a (Click link for more info and facts about Faraday cage)
Faraday cage), while the frequency of the driving signal and the
spacing of the gaps between electrodes is designed so that the maximum
voltage differential appears as the particle crosses the gap. This
accelerates the particle, imparting energy to it in the form of
increased velocity. At speeds near the speed of light the incremental
velocity increase will be small, with the energy appearing as an
increase in the mass of the particles. In portions of the accelerator
where this occurs the tubular electrode lengths will be almost
constant.
http://www.absoluteastronomy.com/enc...ccelerator.htm


Sue...

Also it looks like the EM fields of accelerator cavity are in every
respect
*the coolest thing in the world*.
If there's a better piece of gear than a particle accelerator...is
there?

p

LOL
You can think of them as the 'wrong' end of a telescope.

Sue...

This is TYPiCAL DODGEy GR rhetoric ..for which Tom is well-paid.!!
[FREE PARTiCLEs have NO PHOTON around to absorb, BY DEFiNiTiON].!!
```Brian
p.s.
We MUST squat this GR-fanatic's head ..whenever we see him,
between our thumbs and forefingers, at a dilated distance.!!


Tom Roberts wrote:
Nick wrote:
Some say free particles can't absorb light.

Right. They cannot.

Shouldnt
free particles be free to absorb any amount of energy?

Why? Just because you want them to? Why should your wishes govern the
universe?

This is TYPiCAL DODGEy GR rhetoric ..for which Tom is well-paid.!!
[FREE PARTiCLEs have NO PHOTON around to absorb, by definition].!!
```Brian


Tom Roberts

Sue... wrote:
platopes wrote:
Sue... wrote:


The EM fields of accelerator cavity are in every respect
*light*. A charged particle is moving faster after
transiting one of the cavities.

As the particle bunch passes through the tube it is unaffected (the
tube acts as a (Click link for more info and facts about Faraday cage)
Faraday cage), while the frequency of the driving signal and the
spacing of the gaps between electrodes is designed so that the maximum
voltage differential appears as the particle crosses the gap. This
accelerates the particle, imparting energy to it in the form of
increased velocity. At speeds near the speed of light the incremental
velocity increase will be small, with the energy appearing as an
increase in the mass of the particles. In portions of the accelerator
where this occurs the tubular electrode lengths will be almost
constant.
http://www.absoluteastronomy.com/enc...ccelerator.htm


Sue...

Also it looks like the EM fields of accelerator cavity are in every
respect
*the coolest thing in the world*.
If there's a better piece of gear than a particle accelerator...is
there?

p

LOL
You can think of them as the 'wrong' end of a telescope.

Sue...

Well I tried, but I'm not sure I exactly get it. I'd like to...would
you care to elaborate on this analogy?

WRT a better piece of gear, this was the best I could do -

http://images.google.ca/imgres?imgur...ial_s%26sa%3DN

p

platopes wrote:
Sue... wrote:
platopes wrote:
Sue... wrote:


The EM fields of accelerator cavity are in every respect
*light*. A charged particle is moving faster after
transiting one of the cavities.

As the particle bunch passes through the tube it is unaffected (the
tube acts as a (Click link for more info and facts about Faraday cage)
Faraday cage), while the frequency of the driving signal and the
spacing of the gaps between electrodes is designed so that the maximum
voltage differential appears as the particle crosses the gap. This
accelerates the particle, imparting energy to it in the form of
increased velocity. At speeds near the speed of light the incremental
velocity increase will be small, with the energy appearing as an
increase in the mass of the particles. In portions of the accelerator
where this occurs the tubular electrode lengths will be almost
constant.
http://www.absoluteastronomy.com/enc...ccelerator.htm


Sue...

Also it looks like the EM fields of accelerator cavity are in every
respect
*the coolest thing in the world*.
If there's a better piece of gear than a particle accelerator...is
there?

p

LOL
You can think of them as the 'wrong' end of a telescope.

Sue...

Well I tried, but I'm not sure I exactly get it. I'd like to...would
you care to elaborate on this analogy?

It is rather an old joke.
If you look in one end of a telescope to see galaxies,
should you not be able to look in the other end and
see atoms ?


WRT a better piece of gear, this was the best I could do -

ht
tp://images.google.ca/imgres?imgurl=http://www.pearl-yacht.jp/pearl-yacht/products/specialty/DSC00187121.jpg&imgrefurl=http://www.pearl-yacht.jp/pearl-yacht/products/specialty/Stream%2520Lame%2520Holder.htm&h=640&w=480&sz=43&t bnid=lnNn0Ha3MOUJ:&tbnh=135&tbnw=101&hl=en&start=3 1&prev=/images%3Fq%3Dlame%2Bmachine%26start%3D20%26hl%3Den %26lr%3D%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-USfficial_s%26sa%3DN


Did you mean to say:
http://www.pearl-yacht.jp/pearl-yach...SC00187121.jpg
Pretty!
Yes... sewing machines are cooler than accelerators.
Easier to find:
http://www.guetermann.com/coremedia/...ge/Guetermann/
Sue...


p