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Eise last won the day on November 27 2019

Eise had the most liked content!

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About Eise

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  • Location
    the old world
  • Favorite Area of Science
    Physics, Astronomy
  • Biography
    University degree philosophy, subsidary subject physics
  • Occupation
    Database administrator, a bit of Linux too

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  1. Yep. It is called gravitational redshift.
  2. 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.
  3. 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.
  4. 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
  5. 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.
  6. 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
  7. 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
  8. Then the world is absurd. See a ball and feathers falling in vacuum:
  9. 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.
  10. 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
  11. 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.
  12. 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
  13. 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.
  14. 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.)
  15. '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
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