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 Philosophy of Physics Philosophy of Physics Forum - Philosophical questions about our universe

 Jul 25th 2019, 02:10 AM #11 Senior Member   Join Date: Mar 2019 Location: cosmos Posts: 495 Hi, rabbit htam9876: I introduce a fat lady for you. Her name is Dandan... You can call her "that rabbit"... haha.... Attached Thumbnails   Last edited by neila9876; Jul 25th 2019 at 02:20 AM.
Jul 25th 2019, 03:03 AM   #12
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Quote:
 Originally Posted by htam9876 Case 1: He make the electron turn around the proton in circular track. Case 2: He make the electron move in constant speed along a radial direction of the proton. Case 3: He make the electron move freely along a radial direction of the proton.
Case 1: the electron will be attracted to the proton via the EM force and will accelerate towards it, undergoing radial acceleration. It will radiate Bremsstrahlung and its orbital radius will decrease. To continue circular motion (rather than a spiral), its energy must be topped up by a fluctuating electric field which imposes a force such that the net force maintains circular motion. However, this electric field will also affect the proton, so it's very difficult to achieve the intended motion (will need to neglect the effect of the field on the proton).

Note: this used to be the old "solar system" model of the atom, but when no radiation was observed from orbital electrons, classical thinking had to be discarded in favour of quantum mechanics.

Case 2: the electron will be attracted to the proton via the EM force and will accelerate towards it, undergoing linear acceleration. However, the problem set-up requires constant speed. To prevent it accelerating, it will need to be subjected to an external EM force from an electric field, which constantly changes it's magnitude to adjust to the magnitude of the attractive EM force (in the opposite direction to the proton). No Bremsstrahlung will be emitted, but it will encounter the proton at some point and there will be an interaction (with an interaction probability based on their kinetic energies). However, this electric field will also affect the proton, so it's very difficult to achieve the intended motion (will need to neglect the effect of the field on the proton).

Case 3: the electron will be attracted to the proton via the EM force and will accelerate towards it, undergoing radial acceleration. Bremsstrahlung will be emitted, but it will encounter the proton at some point and there will be an interaction (with an interaction probability based on their kinetic energies). No external electric field is required here.

Basically: accelerating charges emit radiation. Same is true for gravitational acceleration, but typical forces on Earth are very weak, so it might not exceed the threshold energy for momentum transfer ($\displaystyle m\hbar$). You certainly get x-rays from charged particles from matter around extreme environments (e.g. black holes) because the gravitational forces are much larger.

Last edited by benit13; Jul 25th 2019 at 03:29 AM.

 Jul 25th 2019, 03:33 AM #13 Senior Member     Join Date: Jun 2016 Location: England Posts: 963 Eletron "orbital" model Accelerating electrons emit radiation. Electrons in atoms are not emitting radiation, so they are not accelerating. So the simple electron orbital model can not be correct. More recent Quantum Mechanics based models avoid these problems. __________________ ~\o/~
 Jul 25th 2019, 03:33 AM #14 Senior Member   Join Date: Mar 2019 Location: cosmos Posts: 495 rabbit vs cosmos @benit: Everyone goes to the "Beer bar of cosmos" in the lounge column will know you are a great astrophysicist... But I am talking rabbits now .... Dandan...
 Jul 25th 2019, 03:53 PM #15 Senior Member   Join Date: Mar 2019 Location: cosmos Posts: 495 rabbits @rabbit htam9876: Resort to your method, I can find a united identification property for "anti" and understand why neutrino oscillates between three states; resort to the authentic textbook/theory, I can do neither one... How to comment you? Unscientific? haha... Attached Thumbnails   Last edited by neila9876; Jul 25th 2019 at 04:01 PM. Reason: coorect word
Jul 25th 2019, 04:20 PM   #16

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 Originally Posted by neila9876 ...I can find a united identification property for "anti" and understand why neutrino oscillates between three states...
Please let us know how you can do that. I'm very interested in TOE's.

-Dan
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 Jul 25th 2019, 05:51 PM #17 Senior Member   Join Date: Mar 2019 Location: cosmos Posts: 495 rabbits @rabbit htam9876: Do you like Dandan? While she/that rabbit looks bit fat, she is very lovely, right? Do you know what's TOE's? If you know it, please send me a PM. Thanks.haha... By the way, if I resort to the authentic textbook/theory, I think to die and not able to understand such questions as "how big is cosms", etc. If I resort to your method, I can find out what's the border of cosmos: it's electromagnetic wave. Something did exist in cosmos: the background microwave.haha...If the background microwave is the "remaining heat" of BB, can it last so many years stablely? No... The real cosmos is a physical/matter closed 4D space, not a 3D geommetric one.haha... Attached Thumbnails
Jul 25th 2019, 06:08 PM   #18

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 Originally Posted by neila9876 @rabbit htam9876: Resort to your method, I can find a and understand why neutrino oscillates between three states; resort to the authentic textbook/theory, I can do neither one... How to comment you? Unscientific? haha...
 Originally Posted by neila9876 @rabbit htam9876: Do you like Dandan? While she/that rabbit looks bit fat, she is very lovely, right? Do you know what's TOE's? If you know it, please send me a PM. Thanks.haha... By the way, if I resort to the authentic textbook/theory, I think to die and not able to understand such questions as "how big is cosms", etc. If I resort to your method, I can find out what's the border of cosmos: it's electromagnetic wave. Something did exist in cosmos: the background microwave.haha...If the background microwave is the "remaining heat" of BB, can it last so many years stablely? No... The real cosmos is a physical/matter closed 4D space, not a 3D geommetric one.haha...
I like bunnies. If you turn them on their back their feet kick. And they like tummy rubs.

You mentioned "united identification property for "anti"" I strongly suspect the only way you are going to do that is with a Theory of Everything. That would be a theory (we don't have one yet) that explains all four forces: the weak and strong nuclear forces, gravity, and electromagnetism. Why anti matter exists and is in so small an abundance, etc.

Also, we can model the background radiaton in the Universe as being a photon "gas." If the walls surrounding a gas are moved in such a way to increase the volume of the gas then the gas will cool. In the same way, the electromagnetic backgroud radiation has expanded over the billions of years and is very very cool. It's estimated as being about 3K. (The neutrino field does this as well. I don't know if it has actually been measured but I recall someone saying that the equivalent temperature of BB era neutrinos is about 1K.)

-Dan
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 Jul 26th 2019, 12:19 AM #19 Senior Member   Join Date: Mar 2019 Location: cosmos Posts: 495 rabbits @rabbit htam9876: I tell you, What Newton, Maxswell, Einstein, Duke de Brogiel, Schordinger, Dirac, Chuchu (楚楚)***, etc, do with you? No... No matter how fat Dandan is, you should sing: only you... This semi-tramp drunk again? *****?????
 Jul 26th 2019, 04:38 PM #20 Senior Member   Join Date: Mar 2019 Location: cosmos Posts: 495 rabbits @rabbit htam9876: I heard Dan said in the lounge that: "The core of the Earth is thought to be a mix of liquid iron and liquid nickle (the outer core) and a solid iron (inner) core. A spinning metal creates a magnetic field. Yes, the magnetic poles have switched many many times in Earth's history. They generally wander around a bit but every once in a while they flip over. No one is sure why (as far as I know.) What we don't know is just how fast it will do so. This is an important question both because one is due and if it takes a long while to migrate then we may lose our magnetic field. This would be bad because the magnetic field is what repels the solar wind. The surface of the Earth would likely be unihabitable until the magnetic field becomes strong enough to repel the solar wind again. The good news is that (again so far as I know) no mass extinctions have been a result of a pole switch, so it probably won't be catastrophic." Resort to the authentic theory/textbook, I can't find a way to explain why the neutral liquid iron core is able to generate magnetism. What a joke that people have gone to explore cosmos before they make clear why magnetic poles flipped on earth.haha... resort to your method, I found that electron has physical structure and I calculated its size and mass density. It's a bit differrent from the mass density of liquid iron. So, I estimate that there is an "electron skin" floating on the surface of the liquid core. When the earth spins, that will equivalent to charge turn around charge. More interesting, following the variation of the angular velocity, positive ion might move outside instead. There is a "flipping angular velocity". Actually, some reports said that the Earth spin sometimes faster and sometime slower. Attached Thumbnails

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