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Eise

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Everything posted by Eise

  1. You must distinguish between the many different contributions E made to physics. But I assume you mean relativity: special- and general relativity. For special relativity, the time was ripe for its discovery. Several physicists before (Fitzgerald, Lorentz, Poincaré, and several others) already guessed the correct formulas. It was even Poincaré that called the Lorentz transformations that way. But Fitzgerald and Lorentz used more or less ad hoc assumptions to derive them, e.g to explain the null result of the Michelson-Morley experiment. Poincaré's views already circled around the concept
  2. No, no, this is not the way it works. Say you are mining real, physical gold. That also costs a lot of energy (and labour). If you can't earn those costs back with the gold you are selling on the market, you would consider to close the mine. With Bitcoin it is the same: your mining costs energy, infrastructure (especially powerful computers). But then, if you have created a new Bitcoin, you go to the market with it. If your costs were $15'000, and the Bitcoin is worth $20'000 at the moment you have earned $5'000. But if the Bitcoin is $10'000, you have to accept a loss. And you might cons
  3. More or less. But I think I should wait for MPMin's reaction. You see, if you introduce too technical details, there is the risk of a 'conceptual overload'. Either MPMin understands what I mean, or (s)he asks more detailed questions him (her?) self. You see, sometimes my toes curve, not due to space curvature, but because I see that a curious beginner gets confronted with all kinds of technical details that he cannot see through. So this is a didactic principle of mine: try to connect as much as possible to the level of understanding that the questioner has. This risk is exactly shown her
  4. No. 'Flat' means that e.g. parallel lines stay parallel, no matter how far you compare their distance between them. Best example is two light beams. When these do not converge or diverge, the universe is flat. It is difficult to imagine how a positive curved universe can be infinite because it is closed in itself, like the surface of a sphere. But with negative curvature and flat space that problem does not arise. Just take care that the universe seems to be flat on average. Locally, due to mass and energy, the flat universe can be curved.
  5. Recently Ethan Siegel has an article about it: starts with a bang.
  6. I am not a CC expert either, but I picked up, that also financial transactions cost a lot of energy. AFAIK this is because enough of the delocalised blockchains must confirm the transaction before it is definite. Googling I found this comparison: From here.
  7. Yep. It is called gravitational redshift.
  8. This makes no sense. We know 'Newton' is not valid for velocities that are comparable with light speed. So at one side you apply 'Newton' (E = 1/2mv^2), on the other side you apply relativity by saying that the speed of light is speed limit. You need to use relativity from the beginning, and then you will see that a proton accelerated to 7 TeV flies just a tiny fraction slower than c.
  9. In addition to MigL comment on time dilation: at the event horizon of a black hole time dilation for an observer on a big distance goes to infinity. That means the frequency of an EM wave goes to zero, and the remote observer will not see any EM radiation.
  10. See it this way: getting out of a gravitational field costs energy. Objects with mass lose kinetic energy, which means they slow down. Light also has energy, but it is not dependent on its speed, because it always has the same speed. But the energy of light is related to its frequency. So light 'loses frequency', which means its frequency goes down, i.e. it becomes redder. Now imagine a light beam with less energy than needed to get out of the gravity field. It would have no energy anymore, which for a wave simply means it does not exist anymore. At the event horizon EM radiation just has not
  11. Ethan Siegel in 'Start with a Bang': Why You Should Doubt ‘New Physics’ From The Latest Muon g-2 Results It throws doubt about the correctness of the theoretical calculation of the value of g-2. So there might not be a discrepancy between experiment and theory, because the calculation is not rock solid. But hey, how many articles appeared with new physics explaining neutrinos traveling faster than light? Hundreds? But it was an experimental error. This time I set my bets on a wrong calculation.
  12. Of course, I forgive you: even stronger, anyone can correct my English. Wasn't it you who said you wanted to know English perfectly, at least on your deathbed? As long as the stream of the discussion is not disturbed, any correction is welcome. You know, there are so many ways that the same, or nearly the same (especially in none English ears) sounds can be written in English. My favourite is the [i:]: peace piece pee release receive retrieve But life, live, and yes, lose and loose are difficult too to remember. But I try to improove! The one
  13. Don't expect too much from me... Ethics never was a main topic for me. I would say, as any sensible person, just the risk of giving capital punishment to an innocent should be reason enough to refrain from it. And AFAIK deterrence seldom works. So I think incarceration might be the best solution, in the first place simply because we put somebody away who has proven to be dangerous, in the second place we, i.e. society must attach consequences to people who do not want to play by the rules. However, if a society does not take the chance to rehabilitate the offender, it is not much us
  14. Then the world is absurd. See a ball and feathers falling in vacuum:
  15. Wow, 'sphere of existence'... Where can I find that sphere? I did not say that daydreaming or its interpretations do not exist. I said that their existence is different from that of physical objects, because when there were no humans (or other similar conscious entities), there would not be daydreaming.
  16. Janus is right, it was an argument from Galileo against the Aristotelian view on falling objects. In Aristotelian physics, an object twice as heavy as another, falls twice as fast. Galileo's argument works against that viewpoint, but not against Newton's, in which all objects fall with the same velocity (or better acceleration), independent on their mass, and therefore independent on their weight in the same gravitation field. So you are physically and historically wrong. Just to add, Galileo is the first person known, who said that all objects fall the same way, independent of their mass
  17. Sigh. Are you intentionally misunderstanding me? What when there is no Queen of Britain? Then there are no balancing policies of her either. They do not depend on me, or you, but definitely on HM Elizabeth. Electrons on the other hand, would continue to exist even if no human would be there to detect them. So different kind of things exist in different ways. That is my whole point. There is no general EXISTENCE, except if you use such wavy definitions that I used as a reaction on Alex Mercer's post . Existence is not an attribute, as being white, or being rich, etc.
  18. I fully agree, but you are not reacting on what I actually said. And you have not refuted anything, you have just contradicted some view without a single argument. Just look at it this way: if something, principally, cannot play a role in our lives, can you then say it exists? And then I am not looking at historical accidents. E.g. a photon produced by a star in a galaxy billions light years away, arriving at one of its planets surely does not play a role in our lives. But photons definitely effect our lives very much (how else could you read this?). So photons exist, even if we happen no
  19. Sure, for many 'things' existence means 'existing in time'. But there are a few exceptions, which I think I mentioned already: mathematical truths, laws of nature to name just two. And as said, time itself.
  20. Sorry, I am too lazy to look up the exact place where you made the link. But I think only for some categories existence and time are related. Surely for physical processes, but it becomes difficult when you think about laws of nature, and then that which I left out: mathematics. And then think about time itself. There you could get in a definitional loop. (And if this does not fit to your link, then please refer to it, or say it again, maybe a little bit different after my exposé.)
  21. 'Existence' is a word with 9 letters. And if you want to know about the concept behind the word, I think I showed that it depends on the context: existence of what? If you want a general definition you would get something like 'something exists if it can play a role in somebody's life'. And here you see something else: 'existence' is the substantivation of the verb 'to exist'. So the existence of what are you interested in? To give again another example: space and time. One could call them the 'stage' on which causal processes occur (Pity that Markus is away now, he surely had to say some
  22. Yes, pity isn't it? Because the context in which somebody declares the existence of something is essential. 'Things' (the quotes are there to do a warm-up for what is coming...) exist in totally different ways, depending on the kind of 'things' we are talking about. So let's try a few examples, with my comments. Existence of a ball This would fall under what I would call physical existence. It means that a ball can exist independently from its immediate surroundings, and can play a role in causal relationships. It can be moved by another physical object, and it's movement can mo
  23. That would be the same as arguing physics is BS, because there are so many crackpot theories (see our Speculations section). One should look what professional, academic philosophers have to say about 'existence', not at philosophical 'hip shots' of people who are not knowledgeable about what philosophy has to say about the topic.
  24. Eise

    Hiatus

    Hi Markus, This is regrettable for us. I will miss your expert knowledge on relativity, your honesty, and your nearly endless friendly reactions, even on the most weird ideas that are posted here. This friendliness is already a clear sign that you are on the right track. I also like very much that you showed us all that there is no contradiction between the spiritual path you are going, and a scientific world view. And not to forget, your openness on your autism, and your setting straight some misunderstandings about being on the autistic spectrum from your own experience. Somehow I
  25. Thank you for your welcome. But I do not know yet if I am 'back'. It is just that, due to corona measures, I am now working at home (since October), and for some reason it is tiring me more than working in the office. Then additionally to my work, posting meaningful postings here is just another task, instead of fun. So no promise when I chime in again. But be aware! I am still reading the forum nearly every day. And because this was such a clearly real philosophical theme, I had to write my little exposé. No, not necessarily. And as a a heuristic principle, not a methodological
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