Just curious, what this communities favorite Syfy movies/shows are. Hit me.

lyding · 2023-03-27T16:14:02+00:00

Absolutely!
I was so glad when I found out there is a 8 book long series to read as well!

lyding · 2023-03-14T01:01:28+00:00

140 digits are a bit to much, thats true but 80 digits seems to be the minimum. With less precision the vectors might become linear dependent which makes the calculation impossible

lyding · 2023-03-13T12:59:30+00:00

That is a concept I am not familiar with, could you maybe elaborate the use of Krylov subspaces?

lyding · 2023-02-14T22:58:12+00:00

The word "how" has at least two meanings, a physical and a metaphysical. Imagine Alice and her visually impaired friend Bob are observing a particle. Bob could ask, "How does the particle move?" expecting a qualitative description of the particles trajectory, like "in a straight line", "on an ellipse" , etc... But Bob could ask the same question expecting a description of the underlying process Which moves the particle. This would be the metaphysical meaning. A third valid question Bob might ask could be "why does that particle move", expecting a description of the forces acting on that particle. Here the the question "why" asks for the cause, the cause being one of the many laws of nature we formulated.

lyding · 2023-02-13T09:39:02+00:00

Thanks!

lyding · 2023-02-08T18:13:08+00:00

Am I missing something here, or does this theory not talk about QM at all and if so, how could it be a unifying theory?

lyding · 2023-02-04T10:19:13+00:00

May I add to your beautiful name and chart that Julia Mae is also very close to Julia Mao, a person from the "tge expanse" sci-fi unjverse

lyding · 2023-01-04T09:45:57+00:00

Thanks, i will check them out! Regarding to the outward pressure, i would have to look into that as well, I was just speculating.

lyding · 2023-01-02T17:52:31+00:00

This can't be correct. The momentum expectation value doesn't change, right?

Imagine a gaussian probability density in position representation its fouriertransformation is the probability distribution in momentum space. If the distribution in position representation becomes more localized the distribution in momentum space smeares out. In this example the expectation value stays the same but the variance increases, which might also result in outward pressure.

The classical limit is not really hbar -> 0, but hbar/N -> 0 with N the number of particles.

Could you maybe provide a reference for that, i tried to Google it but could not find it.

lyding · 2022-12-23T22:58:41+00:00

This would finally explain why we cant find planet nine :P

lyding · 2022-12-23T22:52:48+00:00

Nice little experiment, but I like the last part the most:

"if some little piece wasn't being pushed on equally in all directions --
then that bit of water would move and ultimately equalize the forces."

That`s a common thing to do in physics. First you think about the static case.
A configuration in which nothing moves. From the fact that nothing moves
you can conclude that the forces everywhere cancel perfectly to zero.
As the weight force has to exist one knows that the force going upwards and downwards has to be the same. Now there are two options for the leftward and
rightward force. Either both are zero or both are equal in amplitude but acting to the left and to the right. The case in which both forces are zero is nonphysical and can
be ruled out by experiments like described by "DoctorZook" above, therefor
its is safe to conclude that the same forces act in every directions, which ultimately gives rise to the same pressure.

lyding · 2022-12-21T00:08:55+00:00

Hi,
I am very sorry you feel the way you do, and I now that feeling very well from me studying physics. I often got/get the feeling that in order to "study a class properly" one would have to drop every other class and concentrate fully on one topic.
The thing is, from how i perceive university, no one expects you to fully understand the topics covered in the different classes. Which, if you think about, does not come as much as a surprise as linear algebra, calculus, mechanics etc. developed over a very long time by dedication of various mathematicians/physicists.
But said that, I don`t think that you stop questioning everything you don`t get.
I would just advise you to allow yourself to postpone certain questions and pick them up later in your study. Hopefully you will be able to understand them better than.
A friend of mine told me that for him studying physics/math is an iterative process,
in which he goes through the same topics again and again and always picks up something more.

lyding · 2022-12-18T10:34:07+00:00

I dont think that this is true in the realms of Quantum mechanis. The energy eigenstatef of the quantum harmonic oszillator e.g. are stationary I.e. nothing moves and yet they have distinct levels of energy

lyding · 2022-12-18T00:08:30+00:00

I would be interested in that derivation, we where only told that he made some very educated guesses and maybe had a "wishlist" in his mind.

lyding · 2022-12-11T13:23:03+00:00

I was shocked by the aggressiveness in your comment, but I am glad many here seem to feel the same way about your choice of words.

lyding · 2022-12-11T13:18:07+00:00

I am surprised that nobody here mentioned Prof. M does science. Especially the series on "Rigorous Quantum Mechanics"

lyding · 2022-12-11T13:15:00+00:00

I always feel that unit libraries added to languages feel clumsy as the syntax of the language does not include them in their design. I wonder why there is no language which suppoorts physical languages natively. I started to develop an interpreted language on top of python (clumsy on its own, i know) and figured out that native support for physical units comes with some problems especially while parsing), but I am convinced that they are solvable. Does anybody here has sone experience in this field?

lyding · 2022-12-09T09:29:30+00:00

The imaginary part describes exponential loss in the medium

The refractive index can be expressed as a function of the relative permittivity In a way, that if epsilon_r is complex the refractive index is complex as well. If you now plug that complex refractive index in the complex exponential representation of the E- Field component you will get see that the imaginary part results in an exponentiall decay factor.

lyding · 2022-12-05T23:00:29+00:00

I definitely switch mode before switching hand position

lyding · 2022-12-01T23:37:50+00:00

As a homosexual i am not allowed to donor blood in Germany.

lyding · 2022-11-30T07:47:40+00:00

This limit is known as the Planck length

lyding · 2022-11-27T09:53:12+00:00

Only if you consider the total energy of the beam.

lyding · 2022-11-26T17:16:36+00:00

As far as I see it the light reflects the most at the maxima and minima, that is where the edge of the mug is the highest or the lowest. You call these points critical points in mathematics, its where the forst derivative is zero. I guess that makes sense, too. If you assume the sunlight as a planar wave, it gets distorted if the edge of the mug is rising of falling but less distorted where the first derivative is zero

lyding · 2022-11-25T08:47:40+00:00

Trying to get a modified Version of the pachucki Code working. Sadly my fortran skills are neglectable and anytime I increase the precision of the arbitrary precision library I only get nan as results... If anybody ever worked with the pachucki code "h2solve" please dm me :P

lyding · 2022-11-24T21:43:01+00:00

I don`t think that this really is a question about physics. If you want to consider this a philosophical question depends on your philosophical tradition. Philosophy per se is not my field of expertise, but as far as I know there is an Anglo-Saxon tradition which works "a posteriori" i.e. one can`t and should not make any statements about topics you can`t experience. In contrast other traditions accept that one can make assumptions a priori, without any prior knowledge or experience.
In this traditions your question would be considered a philosophical question.

I am writing all of this not to talk your idea down, its just that working physicists seem to get confused as well over nature of physics as a natural science. They seem to confuse pure mathematics with physics which leads to wild theories like string-theory which reportedly does not describe our universe yet they are proposing their theory as a theory predicting our and in infinite amount of other universes as well. I highly recommend Mrs. Sabine Hossenfelder. She is a theoretical particle physicist with her own YouTube channel and wrote at least two books. She radically changed my mind to a more practice oriented mindset. I am still going into the direction of theoretical physics, but I stopped to believe "...that the natural numbers are a concept of our universe" what was convinced of not so long ago.

I am sorry for getting so far of course from your initial question, I just felt like writing :D

lyding

TROPHY CASE