Magnetic field impedance

Discussion in 'Pseudoscience' started by BdS, Sep 7, 2016.

  1. BdS Registered Senior Member


    magnetosphere is the region above the ionosphere and extends several tens of thousands of kilometers into space, protecting the Earth from the charged particles of the solar wind and cosmic rays – From wiki article.

    If a blackhole has a much stronger magnetic field than the Earth, can the BH magnetic fields be creating the event horizon?

    Can the BH’s strong magnetic field impede the rays/particles coming in and out of the BH in way that we couldn’t see anything from outside the EH?

    Is impedance the wrong word to use?
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  3. origin In a democracy you deserve the leaders you elect. Valued Senior Member

    AFAIK the answer is no. A magnetic field cannot create an area that a photon cannot escape.

    AFAIK the answer is no.
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  5. BdS Registered Senior Member

    I can’t find or think of anything concrete for photons, but they can be polarised and are electromagnetic.

    What about the charged particles entering the BH through the magnetic field funnel. Do you think incoming charged particles are being routed by the BH’s magnetic field?

    Do charged particles leaving the BH get guided through the magnetic field funnels and create jets?
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  7. paddoboy Valued Senior Member

    If the BH is spinning, [Kerr] then subsequent twisted magnetic field lines can re-route incoming particles/matter and fling them out in the familiar polar jets that we see.
    Any charged BH though is soon negated by attracting opposite charge, just as spin over longer time frames is eventually negated.
    Nothing leaves from inside the EH, but as mentioned above, incoming particles certainly are responsible for polar jets, via the BH's spin and twisted magnetic field lines.
  8. BdS Registered Senior Member

    Is there any magnetic field interaction (attraction/repulsion) involved in the re-routing? like guiding electrons with a magnetic field in CRT tech.
    Saying "twisted magnetic field lines" I'm assuming you are referring to spinning fields?

    And repelling like charge?
    What determines the BH's charge?
    What does the north and south portions of the BH field have to do with like and opposite charges and interactions?
    If the BH is neutral does it attract or repel other charges?
  9. paddoboy Valued Senior Member

    When BH's spin, [Kerr BH's] they create what is known as "Frame Dragging" or the "Lense Thirring Effect", ie it twists spacetime itself around outside the EH, much as stirring a cup of coffee with a spoon.
    Everything caught in this field [the Ergosphere] aalso subsequently spin: With magnetic fields, we get twisted magnetic field lines, along with other matter, that is then thrown out at the polar regions.
    Magnetic field Interaction would be in conjunction with any accretion disk.
    Any charged BH would be relatively minimal but measurable and would not be expected to hold that charge for long, but it is theoretically one of the three properties that a BH may have: the other two being spin and mass.

    Yes, I imagine so.
    Not sure but would guess the rate of angular momentum and nature of the star from whence the BH formed, and also the accretion disk.
    BTW a charged BH with spin is called a "Kerr-Newman"and one without spin is called a "Reissner-Nordstrom"
    Not sure of that or actually what you are asking.
    Probably both without any preference.

    Those links may help.
  10. paddoboy Valued Senior Member

    Spinning ;Kerr BH's] create a spinning spacetime field around themselves we call the Ergopshere, much as the Earth for example is an oblate spheroid due to its spin.....
    This spinning of spacetime outside the BH's EH, is a frame dragging effect or Lense Thirring effect that any spinning mass will cause and as evidenced and shown by the GP-B experiment.

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    Everything within this Ergosphere is literally taken along for the ride, hence the twisted magnetic field lines I mentioned, along of course with any other fundamental matter.
    I imagine so.
    Any charge though maybe just a property of the BH and/or an interaction with the accretion disk, and is expected to be relatively minimal and short lasting.
    Not sure...the nature of the star from whence the BH collaped, the rate of angular momentum, the nature of the accretion disk?
    Not sure what you are asking.
    It would presumably attract all charges without any preference.
  11. paddoboy Valued Senior Member

    Sorry, I thought I had for some reason lost post 6, hence post 7.
  12. BdS Registered Senior Member

    If you set the BH's spin to max, c I assume would be max? can the centrifugal force on the BH's matter cause some of the BH's matter to escape the BH? Where the BH centrifugal force could overcome the BH gravity. I dont have a clue on how to calculate it to test. Like if the Earth was spinning much faster would we get flung off by centrifugal inertia overcoming gravity?

    Can the pressure on the BH's matter cause a BH to divide into 2 smaller BH's? I know nothing can escape the BH but what if the strong gravity causing the pressure is its own mechanism (over a certain mass, pressure) to divide the mass into binary BH's for example.
  13. BdS Registered Senior Member

    The Earth is an oblate spheroid because of spin centrifugal force. So if you speed it up it will flatten into a disk and put the matter on a flat plane perpendicular to the spin. The greater the radius of the flat disc the faster the matter will travel and maybe have enough angular momentum to get into orbit. If its a solid body like earth then it would take a lot of spin to break a object off it. Is the atmosphere thicker perpendicular to spin? is the next thing I must go check out.

    If this is correct then because we are already spinning here on Earth we would need a theory on under calculating mass/weight, because the spin is already giving us inertia opposite gravity.
  14. paddoboy Valued Senior Member

    No mass is ever lost, except via the Hawking Radiation process.
    Physicists also accept that the angular momentum of any BH indeed is limited.
    If it wasn't we would have "naked Singularities" [see post 7 diagram]
    They can spin pretty fast though, as exampled by galaxy NGC 1365 which is spinning at around 84% "c"
  15. timojin Valued Senior Member

    If nothing leaves the BH, then the BH must be growing continuously is that so ? Do the charged particles ever enter the BH or do they just follow the magnetic lines ?
  16. paddoboy Valued Senior Member

    Effectively, yes, but over time, [trillions and trillions of years] Hawking Radiation will see the BH evaporate.
    Anything within 1.5 Schwarzchild radius will be swallowed by the BH, unless it is caught up within magnetic field lines in a spinning BH, and thrown out at the Polar regions in the familiar jets that we see.
    NB: When I say thrown out, I don't mean out of the BH, but out of the vicinity of the BH's field of influence.
  17. BdS Registered Senior Member

  18. paddoboy Valued Senior Member

    Hawking Radiation is a very long term process, to the actual theoretical end stages of the eventual decay/age of the universe, over many trillions of years.
    Magnetic fields are in relatively short time, negated as is spin.

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