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Re: event horizon.

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Tom Roberts wrote:

> On 3/15/18 10:29 AM, Thomas 'PointedEars' Lahn wrote:
>> Tom Roberts wrote:
>>> Note, however, that "radius" is not really applicable ]to a black hole].
>>> The radius of a sphere would be measured inside the sphere, but
>>> the causal structure of the manifold inside the horizon of
>>> a black hole does not permit that.
>> I don’t know about you, but I can measure the radius of a sphere from
>> outside the sphere just as well.
> 
> Sure. But in this context the MEANING of the word "radius" is a distance
> or line from the center to the surface,

Not necessarily.  It can also be easily defined as, e.g., half the diameter, 
or the circumference divided by 2π.

> and that is simply not applicable to a black hole.

Nonsense.  (Google is your friend. [psf 6.1])


PointedEars
-- 
Q: Where are offenders sentenced for light crimes?  
A: To a prism.

(from: WolframAlpha)

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event horizon. Simon Roberts <retenshun@gmail.com> - 2018-03-13 23:32 -0700
  Re:event horizon. Libor Striz <poutnik4REMOVEnntp@CAPITALSgmail.com> - 2018-03-14 08:14 +0100
    Re: event horizon. mlwozniak@wp.pl - 2018-03-14 00:53 -0700
    Re:event horizon. Térov Balónky <iytn@yeicenlw.ik> - 2018-03-14 15:59 +0000
      Re:event horizon. "David (Kronos Prime) Fuller" <fuller.david@hotmail.com> - 2018-03-14 09:19 -0700
    Re:event horizon. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-03-14 18:18 +0100
  Re: event horizon. Tom Roberts <tjroberts137@sbcglobal.net> - 2018-03-14 22:15 -0500
    Re: event horizon. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-03-15 16:29 +0100
      Re: event horizon. Gary Harnagel <hitlong@yahoo.com> - 2018-03-15 09:20 -0700
      Re: event horizon. Térov Balónky <iytn@yeicenlw.ik> - 2018-03-16 14:48 +0000
      Re: event horizon. Tom Roberts <tjroberts137@sbcglobal.net> - 2018-03-19 10:36 -0500
        Re: event horizon. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-03-20 00:56 +0100
          Re: event horizon. Tom Roberts <tjroberts137@sbcglobal.net> - 2018-03-20 14:13 -0500
            Re: event horizon. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-03-20 20:56 +0100
              Re: event horizon. Steven Carlip <carlip@physics.ucdavis.edu> - 2018-03-22 09:17 -0700
                Re: event horizon. Darryl Fletcher <lu@ewiwwe.tt> - 2018-03-22 16:37 +0000
                Re: event horizon. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-03-22 18:10 +0100
                Re: event horizon. JanPB <filmart@gmail.com> - 2018-03-23 13:13 -0700
                Re: event horizon. Prokaryotic Caspase Homolog <prokaryotic.caspase.homolog@gmail.com> - 2018-03-22 14:54 -0700
                Re: event horizon. Koobee Wublee <koobee.wublee@gmail.com> - 2018-03-22 23:06 -0700
            Re: event horizon. Koobee Wublee <koobee.wublee@gmail.com> - 2018-03-20 22:51 -0700
              Re: event horizon. Odd Bodkin <bodkinodd@gmail.com> - 2018-03-21 11:37 +0000
                Re: event horizon. Koobee Wublee <koobee.wublee@gmail.com> - 2018-03-22 13:51 -0700
              Re: event horizon. JanPB <filmart@gmail.com> - 2018-03-23 13:31 -0700
                Re: event horizon. Tom Roberts <tjroberts137@sbcglobal.net> - 2018-03-23 15:59 -0500
                Re: event horizon. Emma Blazer <aemb@wmopswxa.as> - 2018-03-23 22:19 +0000
                Re: event horizon. JanPB <filmart@gmail.com> - 2018-03-23 15:43 -0700
                Re: event horizon. Koobee Wublee <koobee.wublee@gmail.com> - 2018-03-23 22:06 -0700
                Re: event horizon. mlwozniak@wp.pl - 2018-03-23 23:05 -0700
                Re: event horizon. Emma Blazer <aemb@wmopswxa.as> - 2018-03-24 10:55 +0000
    Re: event horizon. JanPB <filmart@gmail.com> - 2018-03-19 20:42 -0700
      Re: event horizon. Tom Roberts <tjroberts137@sbcglobal.net> - 2018-03-23 10:37 -0500
    Re: event horizon. Koobee Wublee <koobee.wublee@gmail.com> - 2018-03-20 22:44 -0700
  Re: event horizon. numbernumber1964@gmail.com - 2018-03-20 13:55 -0700
    Re: event horizon. Odd Bodkin <bodkinodd@gmail.com> - 2018-03-20 23:02 +0000
  Re: event horizon. alsor@interia.pl - 2018-03-20 16:12 -0700
  Re: event horizon. numbernumber1964@gmail.com - 2018-03-22 15:24 -0700
    Re: event horizon. Prokaryotic Caspase Homolog <prokaryotic.caspase.homolog@gmail.com> - 2018-03-22 17:14 -0700
    Re: event horizon. pnalsing@gmail.com - 2018-03-22 17:32 -0700
  Re: event horizon. numbernumber1964@gmail.com - 2018-03-23 10:37 -0700
    Re: event horizon. Prokaryotic Caspase Homolog <prokaryotic.caspase.homolog@gmail.com> - 2018-03-23 13:32 -0700
  Re: event horizon. numbernumber1964@gmail.com - 2018-03-23 10:38 -0700
    Re: event horizon. moroney@world.std.spaamtrap.com (Michael Moroney) - 2018-03-24 01:36 +0000

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