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Genady

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Everything posted by Genady

  1. Genady replied to Genady's topic in Relativity
    I think this question would be OT here.
  2. Genady replied to Genady's topic in Relativity
    I think that the emphasis on escaping is weak. They - bodies, light - not only cannot escape, but they also cannot make a move away from the BH center or even stay still. Everything necessarily keeps moving deeper and deeper into the BH. It is not just about "light itself" (Ethan Siegel). It is about time itself. Beyond the event horizon, direction toward the center is the forward direction of time. Everything - even light - moves forward in time, which means, toward the BH center.
  3. Genady replied to Genady's topic in Relativity
    I don't know if there are data to support this statement, but I'm ready to believe it. I am ready to believe it, because this phrase is repeated so often, that if they remember anything about black holes, then they remember it.
  4. Genady replied to Genady's topic in Relativity
    But that was exactly what I meant in the OP when I wrote, "as if light is expected to escape from everything" (bold emphasis added). Anyway, I think this phrase is just a popular cliché. I've conducted a little experiment five minutes ago. I've asked ChatGPT for a short description of black hole. Of course, its answer represents common patterns in these descriptions. And the first sentence is,
  5. Genady replied to Genady's topic in Relativity
    Aha! To somebody, it does:
  6. Genady replied to Genady's topic in Relativity
    Newtonian BH does not have singularity. But if they think that light is unaffected by gravity, then how does the black hole's effect on light emphasize its gravity?
  7. This clock could be made of the LEDs from the OP's other post and thus cool the Earth atmosphere while disseminating time.
  8. Genady replied to Genady's topic in Relativity
    Perhaps so, I don't know. In my mind, a much more powerful emphasis of how strong the gravity of BH is, would be a phrase, e.g., "nothing, even a spacecraft with an infinitely powerful engine, can't escape it." As I said here, https://www.scienceforums.net/topic/132131-why-even-light/?do=findComment&comment=1246405, "A powered spacecraft, a ladder, a tower, a rope hanging from an orbiting spacecraft, etc."
  9. Genady replied to Genady's topic in Relativity
    What is unclear to me is a role of the word "even" in it.
  10. Genady replied to Genady's topic in Relativity
    Yes, this is right. A powered spacecraft, a ladder, a tower, a rope hanging from an orbiting spacecraft, etc.
  11. Genady replied to Genady's topic in Relativity
    If this is the case, then the comparison to light is simply wrong, because one does not need a high velocity to escape a Newtonian BH. One could just crawl out of it.
  12. Genady replied to Genady's topic in Relativity
    Why? How about "nothing gets out ..."?
  13. I can't decipher this paragraph. Looks like a bad translation.
  14. Genady replied to Genady's topic in Relativity
    It is clear. It can be clearly understood by a layman. Therefore, there is no such a room. I do. I know why it doesn't escape. It is simple and consistent. There are no ambiguities. This is what has happened in your case, I assume.
  15. Bravo. +1. Yes, it does
  16. The part two of that quote is:
  17. This quote only needs a small 100-year update:
  18. After a couple of comments regarding "no equations" phrase in the title I've realized that it would be better to clarify, like:
  19. "No equations" is a vague statement, I realize. Let's say, equations are not needed, but allowed. Don't take this part too seriously. We are asked to find the area of the square in m2. Please provide your answers using the "Spoiler" feature for others not to be affected.
  20. Yes, all correct. The last three are equal squares. This square's area is the question. Right. +1. The steps are not needed, but would be interesting to see, as they might be different.

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