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Showing content with the highest reputation on 03/05/20 in all areas

  1. 2 points
    I'm not convinced. I don't think being forgetful whilst talking, especially in public, is a definite sign of cognitive decline. That video is nothing more than a blooper reel. And Walker Bragman is a journalist and cartoonist not a neurologist. Not what I would call a credible source of information.
  2. 2 points
    Sigh no you have to recognize that harmonic, inharmonic and anharmonic are descriptives of the characteristics of the oscillator. Here is how classical harmonic oscillator is described. A simple harmonic oscillator is a sinusoidal oscillations about the equilibrium point, with a constant amplitude and a constant frequency (which does not depend on the amplitude). https://en.m.wikipedia.org/wiki/Harmonic_oscillator Note what stays constant An anharmonic oscillator n classical mechanics, anharmonicity is the deviation of a system from being a harmonic oscillator. An oscillator that is not oscillating in harmonic motion is known as an anharmonic oscillator where the system can be approximated to a harmonic oscillator and the anharmonicity can be calculated using perturbation theory. If the anharmonicity is large, then other numerical techniques have to be used https://en.m.wikipedia.org/wiki/Anharmonicity Note this oscillator deviates from the harmonic oscillator. Now see the examples they provide for each on the restoring force ? Now the quantum harmonic oscillator is the Spring example as opposed to the pendulum example. The first example the restoring force is a linear function. However it is also a symmetric linear function which can be described by the inner product. The inner of two vectors returns a scalar Ie magnitude. So the momentum in the spring is described by linear functions. The latter case the vectors are curvilinear the force follows a spinor rather than a vector. In this case you also require the direction so you would need the cross product of the vector. This is antisymmetric The pendulum example requires angular momentum equations which are not linear. You need to understand this to start being able to identify when a ratio of change is symmetric or antisymmetric in wavefunctions. Don't worry about inharmonic functions for now let's get this clear first. Edit this also a vital key to understanding the Maxwell equations as well as GR. As its applicable to all physics models
  3. 1 point
    It's reasonable to assume reality will continue to baffle a reasonable explanation...
  4. 1 point
    Personally I think there is a great mathematical beauty in String Theory, and a number of important advances in both mathematics and theoretical physics have emerged from the study of this model. However, “it’s beautiful” is not a scientific argument, and no indicator as to its value as a valid model of quantum gravity. One of the main problems I see right now is this - String Theory doesn’t actually produce GR in the classical limit, it produces GR plus a large number of scalar fields. There is no evidence for any of these scalar particles in the real world, nor is there any known way to mathematically remove them from the theory. This is an awkward problem, and I don’t see it being discussed very often in the ST community. Furthermore, we don’t actually know whether or not ST is even capable of reproducing all the particles of the Standard Model (plus their interactions and symmetries) in a self-consistent manner. My take on this is - String Theory certainly warrants further research, but it is at best unclear whether or not it can produce a workable model of quantum gravity. There are a lot of fundamental problems associated with this model, which would need addressing.
  5. 1 point
    Well from a personal view, I find that the quantum regime isn't weird once you remove classical viewpoints. Entanglements and wavefunction collapses obviously involve probability functions but the mathematics are similar to statistical mechanics.
  6. 1 point
    And of course the "Father of the BB theory" the Belgian priest, Father George LaMaitre.
  7. 1 point
    Mohamed Abdus Salam: Pakistani theoretical physicist. He won the 1979 Nobel prize with Sheldon Glashow and Steven Weinberg for their work on electroweak unification theory. https://en.m.wikipedia.org/wiki/Abdus_Salam#Religion
  8. 1 point
    Isn't it the other way around? What we observe in nature is the weird looking stuff. And QM is the, or at least one, explanation for it? I do not see how you can take the observations that we make about the universe to not reasonably represent how the universe is.
  9. 1 point
    No that isn't enough. Rather than try to latex all the steps I will link a lesson plan. https://www.google.com/url?sa=t&source=web&rct=j&url=http://physics.gmu.edu/~dmaria/590%20Web%20Page/public_html/qm_topics/harmonic/&ved=2ahUKEwit56aWkffnAhUiGTQIHdHNDK8QFjAmegQIBRAB&usg=AOvVaw0Xj29xXrtC_pZ9_IruaD_p If you look at this the solution will depend on the particles principle quantum numbers. If I were to get the eugenenergies and eugenstates using string theory or QFT the solutions will vary however in all three the principles are the same for orthogonality conditions and hermitean. Other related articles will employ the ladder operators (the creation and annihilation operators serve this purpose) Here is a brute force method using asymptotic analysis. https://www.google.com/url?sa=t&source=web&rct=j&url=https://ocw.mit.edu/courses/physics/8-04-quantum-physics-i-spring-2013/lecture-notes/MIT8_04S13_Lec08.pdf&ved=2ahUKEwit56aWkffnAhUiGTQIHdHNDK8QFjAjegQICBAB&usg=AOvVaw264tFks4Y_ZaWfwThAUR7M This will add some further details and is a more undergrad level. https://opentextbc.ca/universityphysicsv3openstax/chapter/the-quantum-particle-in-a-box/ I would identify the commonalities between the three links. Specifically what conditions must be satisfied. I would think about this question. Specifically identify the difference between a harmonic oscillator vs an anharmonic oscillator there is also an inharmonic oscillator. (Just a side note on the last). Now one of conditions all three links mention can be satisfied by a harmonic oscillator. Without mentioning the specific condition (as you should study each one ) can those conditions be met with an anharmonic oscillator ?
  10. 1 point
    One of a number of water's properties that have profound effects for life, at least as we know it.
  11. 1 point
    Maybe tulip bulbs...they keep longer than eggs
  12. 1 point
    I always feel like I'm in an Arizona Iced Tea commercial where I've climbed a mountain and begun speaking with an old hippie sitting legs crossed at the top each time Dim is in a thread...
  13. 0 points
    ...you are not helpful....
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