Key Experiments of Physics: Einstein - De Haas

Einstein's greatest experimental achievement - despite a little stumbling

Mind also my backup channel:

[tylermorgan]

Best quote of the day. “ Quantum is just a name that is made up for the lack of understanding of nature”. Mad my day! Thanks

[romado]

More and more it is so important to check the older paper today's papers misrepresent, omit, or just unaware of past experiments.

[mmotsenbocker]

this is a totally amazing insight that I had not known about before as it helps explain the puzzle of how an electron moving in one direction produces a plus spin photon and the same electron moving in the opposite direction (and 180 deg out of phase) produces a minus spin photon during a full oscillation ina one dimension wire. (ratio of two energies comes in here). I would love to see you go into more depth on how this key experiment has been followed up on, especially the relationship between electron energy and photons. thank you very much

[eskimofireman]

I would love to hear your ideas about the Structured Atom Model.

[JerryMlinarevic]

The problem in understanding the result of the experiment is that the basic understanding of a magnet is lacking: magnetic particles that constitute the field lines run from N 2 S and S 2 N co-rotationally about the, in this case, drum. Hence, the magnetic moment is twice of single 'electron' (notwithstanding, additional problems arise due to erroneous nomanclitudure).
After all these years standard science still does not understand the magnet nor the difference between a magnetic particle and an electron.

[BiswajitBhattacharjee-upvv]

The another good series of " key experiments "
Could be the lost key. Proveing a model could be path finding for wrong Mathamatcs but not the model. As curve fitting of black body a clue to atoms inside not the concept of " black body radiation ".
Doing everything for black now fundamental laws I.e the mathematics is needed for dark sector.
Please use a dark chocolate in model to make the episode on bright broad day light. The invisible quanta don't need these radiation field as you are standing within the field straight.
Surely you have curved space around yet to measure the bent.
I am trying to sketch an super thought experiments to see the spin .
You are fundamental channel. Unique.

[brandonb]

Great video! Seems like “spin” would have been the first thing solved, since we live on a spinning ball?
Thank you Dr. Unzicker!✌🏼😊

[FunkyDexter]

3:30 Lawrence's "proof" of spin requiring velocities higher than c is a non-sequitur. For the derivation he assumed a spherical ball with the classical electron radius, spinning, and simply calculated the necessary angular speed to generate the known magnetic moment. This was taken as proof that the quantum angular momentum is fundamentally different than macroscopic angular momentum (even though the two are clearly connected in the Einstein/de Haas experiment). Of course, all the proof really does is show that the electron can't be a spherical ball with charge distributed on its surface. A similar misinterpretation happens with regards to bell's inequalities, as Arthur Fine showed in the 80s.

[TCBytom]

Many times when I encountered detail description of old experiments from beginning of 20th century I'v realized that it's interpretation was flawed and could be done otherwise... This is another one...

[JAYMOAP]

"The application of topology concepts to Maxwell equations has led to the developing of the whole area of electromagnetic knots. In this paper, we apply some symmetry transformations to a particular electromagnetic knot, the hopfion field, to get a new set of knotted solutions with the properties of being null. The new fields are obtained by a homothetic transformation (dilatation) and a rotation of the hopfion, and we study the constraints that the transformations must fulfill in order to generate valid electromagnetic fields propagating in a vacuum. We make use of the Bateman construction and calculate the four-potentials and the electromagnetic helicities. It is observed that the topology of the field lines does not seem to be conserved as it is for the hopfion."

[shadowdragon]

Have you seen the recent paper published by Rajendra Gupta of the University of Ottawa which favours the CCC+TL model of the universe over ΛCDM?

[lesseirgpapers]

Einstein admits in his 1913 paper that relativity "has a undeniable defect" ...To figure out relativity you can not have relativity.

[DrakeLarson-jspx]

I suggest looking at inversion physics; as in curiosity in the geophysics PREM chart made by Mary Fowler (E. Rutherford's grand daughter). This might be an excellent starting point for a better understanding of this 'gyromagnetic ratio error' ...dark energy, the red shift, etc.

[benmcreynolds]

This is really inspiring. I really hope we go back over certain basic foundational aspects of physics again. There are scales in our universe that are so Vastly immense & Vastly small, that it only seems understandable that we haven't fully grasped them yet. Dynamic chaotic systems are very hard for our simulation models to comprehend. Especially if our measurements are off & it's pretty hard to measure vast systems. What if at those immense scales, we don't yet fully grasp how things fully work? Like density, gravity, friction, Electromagnetism, static charges, fluid dynamics, temperature, pressure, radiation, velocity, etc. *I think there is a lot left to learn about these behaviors on VAST scales throughout our cosmos? Especially when talking about scales of galactic filaments, multiple galaxies interacting, and many many more cosmic bodies & structures.
We are getting better & better at certain things but some things are just so vast that it's understandable if we don't fully grasp them yet. I'm curious to see where things go as we advance our ability to measure & comprehend these things. Not just on large scales but the extremely small scale as well. When it comes down to our simulations, the smallest changes in our measurements can change so much. I'm just hoping we learn certain things in my lifetime. I'm really curious where future discoveries will lead us.

[BenjaminGatti]

Felt a bit disorganized, maybe try this topic again in descending order with key thoughts. Stay focuseed on the experiments, not the passionate nature of the people involved etc.. experiment and impact.

[surendranmk]

There is only two particles that creates all the material things and they are allways tiny magnets. They have constant electric and magnetic properties that donot change or vary in any circumstances. They just align them selves. Moving charge donot produce any extra magnetic field. They just align mutually. You are thinking, and make people think too!

[walterbrownstone]

Einstein was the head of the human centipede of science. A proton going left has the same magneticorientation as an election going right. 1+1=2. What did you say Einsteins experimental error was?

[denismelly]

Hey sir, i have a theory you'll be interested in about gravity, dirac large number hypothesis...am from Kenya how can i reach out to you

[Tom-spgy]

Would have been nice if you provided some references to understand your sources and concepts

[keithnorris]

When I try to study such things I always get more interested in and distracted by the tools used in the experiments intended to develop further understanding for example. After the deposition of the magnetic multilayers on the developed PMMA, an extended liftoff in dichloromethane was done, with the membranes upside-down to alleviate strain. A 2-nm Pt overlayer was deposited after liftoff to alleviate charging problems due to the low electrical conductivity of a-SiNx with X-PEEM.
I have a low level of trust ( in people paid to say what they are saying ) but there is a prohibition on acquiring the materials with which experiments can be conducted. But so what I always enjoy the Unzicker real physics brain prompting stuff and I look forward to the next one, thanks Doc.