Not what we think of as Amateur Radio Astronomy

[Stephen Arbogast]

... but  important   to keep in mind  about the Hydrogen  Line...  

See   https://www.youtube.com/watch?v=Dd0DHdv2b9M

[Jan Lustrup]

Very interesting YouTube link Stephen…..food for thought.

Hmmm…Hydrogen line “photons” = Quantum excitations!

Jan Lustrup

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[Dave Typinski]

This is not Richard Feynman. It is, unfortunately, AI generated slop.

If you want a real physicist discussing quantum fields, try David Tong's Faraday
Lecture:

https://www.youtube.com/watch?v=zNVQfWC_evg

--
Dave

On 3/26/26 20:06, 'Stephen Arbogast' via Society of Amateur Radio Astronomers wrote:
> ... but important to keep in mind about the Hydrogen Line...
>
> See https://www.youtube.com/watch?v=Dd0DHdv2b9M
>
>

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[fasleitung3]

Thanks Dave for pointing that out.
The fact that it is AI generated is only shown for maybe 100ms at the
beginning. What credibilty does that have if the "creator" does
everything to hide that it is AI?
Also, there is a lot of other stuff around on Youtube misusing his
name.

Wolfgang

[Jeff Kruth]

I am usually very skeptical of AI. But my EM & Physics background spotted no glaring errors. Was the material faulty in any regard? I rather liked it, even if poor Richard was unavailable to narrate in person.

Jeff Kruth

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[Stephen Arbogast]

In My Humble Opinion....    I  find  nothing  wrong  with  AI  generated  content  if  it is correct.   I am not  an expert  on Quantum  Field  Theory   but  I was  impressed   with this...  even  though Richard Feynman  is no longer  around.   I wonder  if  he  would be  ok having  his likeness used  to  teach  Physics.  He  was  a  great teacher.

[Stephen Arbogast]

I have watched  this  several  times...    https://www.youtube.com/watch?v=zNVQfWC_evg

How  is   Richard Feynman not  a  real Physicist?

[Dave Typinski]

Richard Feynman was a physicist. The video portraying him discussing quantum
fields, however, that discussion never happened. It's an AI-generated piece.
To wit, this video shows RF mentioning dark energy, but that term didn't come
into use until a decade after his death.

To use someone's likeness to promote your product without obtaining their
permission and providing compensation is exceedingly poor form. It's easily
actionable in civil court when it's done for commercial gain -- in this case,
revenue from YT engagement.

To do this without explaining that it is AI-generated is also very poor form.
To the creator's credit, they do explain this very clearly in the video
description -- but how many people actually read YT video descriptions?
Asymptotic to zero.

Deepfakes are a real issue now. It will take the courts some time to catch up,
but they will eventually. Unfortunately, this probably won't happen until long
after the LOL WUT theory runs to completion.

=====
"First, AI gets accessible enough that anyone can use it. Second, AI gets good
enough that you can’t reliably tell what’s fake. Third, and this is the crisis
point, regular people realize there’s nothing online they can trust. At that
moment, the internet stops being useful for anything except entertainment."
=====

In some areas this has already happened. In others, it will take a little while
longer. But, perhaps, not as long as one might hope or imagine.

https://www.schneier.com/blog/archives/2026/03/on-moltbook.html
https://slashdot.org/submission/17344630

--
Dave

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[Whitham Reeve]

Dave - I completely agree with you. And, your name "SLOP" for this particular AI product perfectly describes it.

Whit

[fasleitung3]

I have nothing to add to Dave's view. I fully concur with what he said.
Talking about Richard Feynman, he was not only an excellent theoretical
physicist and Nobel laureate, he was also known for the "Feynman
Lectures on Physics". This is a set of books which, when I was a
student, was the main thing to read.
Today it is available online at https://www.feynmanlectures.caltech.edu
How about reading what he has to say about our favorite subject:
https://www.feynmanlectures.caltech.edu/III_12.html

Best regards,
Wolfgang

[Doug Leber]

I make a habit of downvoting and reporting sites like these. It is fraudulent appropriation of a deceased person’s image and reputation. It's more than slop— it's manure.

I’d love to find a way to complain loud enough so that YT pays attention. Alphabet has little incentive to clean up this trash.

Doug

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[Jeff Kruth]

All well and good. But rest assured, the ever popular AI will resurrect Nikola Tesla, Albert Einstein, Carl Sagan, et al to lecture. There are many OPINIONS here, but all of them beg the question I asked.

"Was the info presented in error?" Not was it wrong to bring Feynman back to life. (Although after reading Surely You Must Be Joking Mr Feynman ,IIRC the title correctly as it been YEARS,  he was a jokerster and rather lighthearted so he may enjoy be brought back to life, esp. if it educates someone).

Was the YT factually wrong, or just in poor taste? Or cant anyone really answer this?

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[Dave Typinski]

The point isn't about the text being factually wrong, it's about using the
reputation of someone else to present material for which the audience will have
a difficult time determining veracity.

Someone making a video as a summary of previously published works, fine. But,
there are a couple rules that should, in my opinion, be followed:
1) Don't use the AI plagiarism machine to create the text, and
2) Don't use AI to create a likeness of a respected individual in the field to
lend credence to the text.

For example, if you see Feynman say something, you're going to believe it
because he's got the reputation and the Nobel to prove he knows what he's
talking about. If you see some random dude from the internet say the exact same
thing, you're going to (or should) use much more caution about what to believe.

I realize my opinion isn't likely to change anything, for YT makes far too much
money off of selling ads -- and AI-generated videos are getting a LOT of views.
YT will not bite the hand that feeds them.
--
Dave

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[Andrew Thornett]

Here is another poem this time dedicated to Dave Typinski - hope you don't mind, Dave!

Andy

Here’s your text transformed into a playful, slightly cheeky poem:

---

There once was a physicist bright,
Richard Feynman by name and by right.
He’d lecture with flair
On quanta and air—
But this time, something’s not quite right…

For lo! in a video he speaks,
Of dark energy’s mystical tweaks—
Yet the term, strange to say,
Came well after his day…
Which raises some eyebrows (and geeks).

An AI has donned his old face,
And borrowed his charm and his grace.
But to use such a guise
For views and for prize
Is, frankly, a questionable case.

No nod, no consent, nor a fee—
Just engagement and clicks on TV.
In court it might land,
With a firm legal hand…
“Exceedingly poor form,” we’d agree.

Now, credit is given—’tis fair—
The truth is disclosed… somewhere.
But who reads that fine
Print down in the line?
A number approaching thin air.

Deepfakes now dance in the wild,
Both clever, concerning, and styled.
The law lags behind,
Still catching its mind—
While chaos runs gleefully wild.

And thus we observe, slightly dazed,
As timelines and truths get all glazed—
Till courts intervene,
Long after the scene,
And the “LOL WUT” phase is phased.

Sent from Outlook for Android

---

From: sara...@googlegroups.com <sara...@googlegroups.com> on behalf of Dave Typinski <dav...@typnet.net>
Sent: Monday, March 30, 2026 1:02:39 AM
To: sara...@googlegroups.com <sara...@googlegroups.com>
Subject: Re: [SARA] Not what we think of as Amateur Radio Astronomy

 

To view this discussion visit https://groups.google.com/d/msgid/sara-list/69C9BD9F.3080408%40typnet.net.

[Dave Typinski]

Ha! That's excellent, I love it! :)
--
Dave

On 3/30/26 01:24, 'Andrew Thornett' via Society of Amateur Radio Astronomers wrote:
> Here is another poem this time dedicated to Dave Typinski - hope you don't mind,
> Dave!
> Andy
>
> Here’s your text transformed into a playful, slightly cheeky poem:
>

> --------------------------------------------------------------------------------

>
> There once was a physicist bright,
> Richard Feynman by name and by right.
> He’d lecture with flair
> On quanta and air—
> But this time, something’s not quite right…
>
> For lo! in a video he speaks,
> Of dark energy’s mystical tweaks—
> Yet the term, strange to say,
> Came well after his day…
> Which raises some eyebrows (and geeks).
>
> An AI has donned his old face,
> And borrowed his charm and his grace.
> But to use such a guise
> For views and for prize
> Is, frankly, a questionable case.
>
> No nod, no consent, nor a fee—
> Just engagement and clicks on TV.
> In court it might land,
> With a firm legal hand…
> “Exceedingly poor form,” we’d agree.
>
> Now, credit is given—’tis fair—

> The truth /is/ disclosed… somewhere.

> But who reads that fine
> Print down in the line?
> A number approaching thin air.
>
> Deepfakes now dance in the wild,
> Both clever, concerning, and styled.
> The law lags behind,
> Still catching its mind—
> While chaos runs gleefully wild.
>
> And thus we observe, slightly dazed,
> As timelines and truths get all glazed—
> Till courts intervene,
> Long after the scene,
> And the “LOL WUT” phase is phased.
>
>
>

> Sent from Outlook for Android <https://aka.ms/AAb9ysg>
> --------------------------------------------------------------------------------
> *From:* sara...@googlegroups.com <sara...@googlegroups.com> on behalf of
> Dave Typinski <dav...@typnet.net>
> *Sent:* Monday, March 30, 2026 1:02:39 AM
> *To:* sara...@googlegroups.com <sara...@googlegroups.com>
> *Subject:* Re: [SARA] Not what we think of as Amateur Radio Astronomy

>> > > > Seehttps://www.youtube.com/watch?v=Dd0DHdv2b9M

> https://groups.google.com/d/msgid/sara-list/FRWP194MB2752CBB57B490197BCA06737FF52A%40FRWP194MB2752.EURP194.PROD.OUTLOOK.COM
> <https://groups.google.com/d/msgid/sara-list/FRWP194MB2752CBB57B490197BCA06737FF52A%40FRWP194MB2752.EURP194.PROD.OUTLOOK.COM?utm_medium=email&utm_source=footer>.

[Stephen Arbogast]

Sorry  about  the  controversy     but    we  are  having  some  discussion....

Try   this...   https://www.youtube.com/watch?v=_TBNJyztai0

[Dimitry UA3AVR]

Has somebody from amateurs ever seen the Zeeman splitting of the HI line?

воскресенье, 29 марта 2026 г. в 23:32:02 UTC+3, fasleitung3:

[Bruce Rout]

It's the splitting of Hydrogen line. The 21 cm line is fundamentally a magnetic interaction in the n=1 state, tied to the proton’s magnetic moment interacting with the electron’s moment. The Zeeman effect is usually referred to as interactions involving an external magnetic field. However, the proton has a magnetic moment that provides a field which splits the n=1 line Into two lines. The energy difference between the two lines is 21 cm.

This is in Zeeman and Lorentz 1902 Nobel prize.

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[fasleitung3]

My understanding is that Zeeman splitting of the HI line can only be detected indirectly by measuring a small difference between left- and right hand circular polarization. The classical experiment would be to try this in absorption towards Orion A where the magnetic field is relatively large.

We do not have the capability of measuring full stokes parameters with high precision at our 25-m dish so we have not even tried it.

Best regards,

Wolfgang

[Dimitry UA3AVR]

Surely, Bruce, i meant the line splitting in the magnetic field.

вторник, 31 марта 2026 г. в 20:35:15 UTC+3, Bruce Rout:

[Dimitry UA3AVR]

Wolfgang, thank you. May be you have info on what requirements are needed for a polarizer and cross-polarization isolation of the system.

вторник, 31 марта 2026 г. в 21:12:24 UTC+3, fasleitung3: