Re: Double Slit Puzzle Explained (?)


"FrediFizzx" <fredifizzx@xxxxxxxxxxx> wrote in message
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"Bill Miller" <billmillerkt4ye@xxxxxxxxxxxxxxxx> wrote in message
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"Szczepan Bia³ek" <sz.bialek@xxxxx> wrote in message
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"Bill Miller" >

It should be noted that this radiation is not coherent. Instead, it
will be wideband with spectra determined by the geometry of the slit,
the path of the electron(s) WRT the slit and the energy contained
therein. The radiation is in the Xray range.

In the first experiment by Davison and Germer they used 75eV electrons.
There no Xray.

Thanks for the nudge. I re-read Kirk's paper and realized that the Xray
reference was an UPPER LIMIT for this phenomenon. I've sent him an Email
to see if he can explain the expected spectrum. Also, "typical" Xray
generation involves electrons smashing into stationary items. Transition
Radiation is a different mechanism, and that MAY allow Xray generation at
lower eV levels. (Or it May not!)

So I agree with FrediFizzx: "I believe the way an electron experiment is
done is that it is actually an electron hitting the detection "plate"
that is recorded. And not radiation."

Belief is a wonderful thing. It can substitute for facts in almost any
environment! But don't forget that the SAME RESULTS are found with light
radiation.

Not exactly. With light you see the two slit interference immediately.
With electrons you don't see the two slit interference until enough
electrons have passed and been detected. I have reviewed the electon
experiments in the past and know that it is in fact electrons being
detected.

OK Let's see if I understand.

1.When we put light through the slits we get a certain pattern essentially
instantaneously. And that pattern is due to light waves striking the plate.
YES?

2. When we change from light to electrons, a zap them through the same
slits, we get the same pattern. But that pattern builds up over time. And it
has been shown that the pattern is due to impacting electrons; not waves.
YES?

If 1 and 2 are true then we appear to have two entirely different mechanisms
leading to *exactly* the same inexplicable results.

I, and Hercule Poirot, dislike coincidences.

I accept 1 as being correct. My issue, then is with #2. I'm not suggesting
that your recollection of earlier research is incorrect. But I do wonder
what mechanisms were adopted in that earlier research to be CERTAIN that the
fogging was due entirely to impacting electrons? (After all, impacting
electrons was what they were expecting, isn't it?)

I've dug a little deeper, thanks to McDonald, and learned a couple more
things about Transition Radiation. First, it seems to have a usable spectrum
that ranges from UHF (not TOO useful for fogging a photo plate) through
visible light up to high Xrays. So the spectrum seems to fit with what might
fog a photo plate.

Second, it's not terribly efficient. According to Kirk, it takes about 1000
electrons to generate one photon (whatever that is!). So, any Transition
Radiation-induced fogging of a photo plate would build up over time. And
that kinda fits with your "slow build up" statement.

So far, I'm not seeing anything that "kills" the slit-as-an-aperture antenna
idea.

I'm just too lazy to do your research for you. ;-)

I'm not ALL that lazy. it's just that my library card got taken away from me
about 45 years ago, and I do not have FREE access to the online scholarly
research that is available to current students, current staff and
emeritus-type folks. I wish I did!

Thanks for your thoughts, Fred.

Bill

Best,

Fred Diether
Co-moderator sci.physics.foundations


.

Relevant Pages

  • Re: Double Slit Puzzle Explained (?)
    ... It should be noted that this radiation is not coherent. ... of the electronWRT the slit and the energy contained therein. ... In the first experiment by Davison and Germer they used 75eV electrons. ... There no Xray. ...
    (sci.physics.electromag)
  • Re: Double Slit Puzzle Explained (?)
    ... will be wideband with spectra determined by the geometry of the slit, the path of the electronWRT the slit and the energy contained therein. ... The radiation is in the Xray range. ... "typical" Xray generation involves electrons smashing into stationary items. ... Transition Radiation is a different mechanism, and that MAY allow Xray generation at lower eV levels. ...
    (sci.physics.electromag)
  • Re: Double Slit Puzzle Explained (?)
    ... It should be noted that this radiation is not coherent. ... of the electronWRT the slit and the energy contained therein. ... In the first experiment by Davison and Germer they used 75eV electrons. ... not only from external atoms but also from deep ones. ...
    (sci.physics.electromag)
  • Re: Is a fact something that has been proven?
    ... So it's your contention that the electrons go through the slits as ... experiment and the double slit experiment. ... experiment "without detectors" but then later cheat and peek into what ... Even a single photon "knew". ...
    (talk.origins)
  • Re: Is a fact something that has been proven?
    ... So it's your contention that the electrons go through the slits as ... description and interpretation of the double slit experiment ... through the slits (with the detectors turned on) when human knowledge ... A *PAIR* OF ENTANGLED PHOTONS, ...
    (talk.origins)
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