Recent content by Elnur Hajiyev

  1. Elnur Hajiyev

    A Light from the singularity of a charged black hole

    That is exactly what I was trying to express in post #8. Maybe you did not fully comprehend my reply. So, I again have been sure that the conclusion which I had came to in #8 was right after this reply. I see in almost all of the threads in this category you try to help users to find an answer...
  2. Elnur Hajiyev

    A Light from the singularity of a charged black hole

    @PeterDonis , I don't understand, why are you making the discussion more complicated than it is. You see, I wrote that naked sigularity is naked from white hole infinity and is hidden from black hole infinity. Black hole infinity does have horizon, from which "light cannot escape", so I am...
  3. Elnur Hajiyev

    A Light from the singularity of a charged black hole

    No. You said sub-extremal black hole cannot be formed from generic initial conditions. I showed you a reference from S. Carroll's book in which it says it can and requested from you to explain your contradictory statement and giving some noble references if you think the book is wrong. By...
  4. Elnur Hajiyev

    A Light from the singularity of a charged black hole

    @PeterDonis , I would really like to see the references from which you come to these conclusions. But as I mentioned before, I read from Carroll and everything he says seems to me logical, so is it too. Other sources that I read are also consistent with it. You can see it here: I know in the...
  5. Elnur Hajiyev

    A Light from the singularity of a charged black hole

    I think it is not important in this situation, whether the second patch is of a different or the same one since they are different locations in space and/or time. However as far as I know, the metric does not imply anything about the connection of the patches, that is why I used the word...
  6. Elnur Hajiyev

    A Light from the singularity of a charged black hole

    @PeterDonis , after reading your comment and doing some research, I think I have finally got it. I have came to this conclusion that naked singularity is only defined by the fact whether it is seen from infinity or not. So, we say, RN black hole has a naked singularity for only super-extremal...
  7. Elnur Hajiyev

    A Light from the singularity of a charged black hole

    @PeterDonis , I study from S. Carroll's book and it is from there, that's why I am confused.
  8. Elnur Hajiyev

    A Light from the singularity of a charged black hole

    Why is it descripted with the incomplete form in Wikipedia, GR books(S. Carroll) then? Actually it is the first time I have seen the second part of the definition. Can you please mention any reference, in which I can find a description of naked singularity in this form?
  9. Elnur Hajiyev

    A Light from the singularity of a charged black hole

    But an observer in the wormhole part of the spacetime can both send and receive light from the singularity, right? If I get it correctly, it will not be considered as a naked singularity, will it be, because wormhole is a limited zone of the diagram, enclosed with horizons.
  10. Elnur Hajiyev

    A Light from the singularity of a charged black hole

    According to Cosmic Sensorship Conjecture, naked singularities are prohibited in General Relativity. To my knowledge, naked singularity means light from the singularity can escape to infinity. In Reissner-Nordström metric, references say naked singularity appears only if ##GM^2<P^2+Q^2##...
  11. Elnur Hajiyev

    B Examining Time Dilation and the Effects of Velocity on Perception of Time

    @PeterDonis , @Ibix , I think I have some difficulties to express myself. Please read my previous post carefully as I did not give 6pm and 12pm examples as time concepts, but as an event of clock ticking on the specific time on the specific location, because I was talking about specific...
  12. Elnur Hajiyev

    B Examining Time Dilation and the Effects of Velocity on Perception of Time

    No. I did not mention it as a time. I meant 6 pm as an event. Ok, let's say going to toilet and coming from toilet of B instead of 12 pm and 6 pm. And by saying time interval, I tried to say that, time dilation compares how much time elapsed from the perspective of A and B. In this case: how...
  13. Elnur Hajiyev

    B Examining Time Dilation and the Effects of Velocity on Perception of Time

    I mean, time intervals, not spacetime intervals. Are not being 12 pm and 6 pm considered as two different events for both observers? And both observer measures different time and space interval but same spacetime interval between these events?
  14. Elnur Hajiyev

    B Examining Time Dilation and the Effects of Velocity on Perception of Time

    @Faiq , you misunderstood the math behind the time dilation. ##t_A## should be greater than ##t_B## for the observer A, if the observer B is moving relative to the observer A. Let's say both observers measure the time elapsed between two events—for example, between 12pm and 6pm on the clock of...
  15. Elnur Hajiyev

    A Hubble parameter vs Scale factor's derivative

    Yeah. Now it has become more clear to me. Thanks for sparing your time to write detailly answer the question.
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