Groups > sci.physics.relativity > #461177

Re: Light and modern physics

From	Volney <volney@volney.invalid>
Newsgroups	sci.physics.relativity
Subject	Re: Light and modern physics
Date	2018-06-13 17:11 -0400
Organization	A noiseless patient Spider
Message-ID	<pfs195$c14$1@dont-email.me> (permalink)
References	(3 earlier) <09ZTC.337415$ga6.328303@fx24.am4> <pfq82c$3qg$1@dont-email.me> <VA3UC.932588$MD7.629452@fx14.am4> <pfrji6$vrs$1@dont-email.me> <aLdUC.859856$yN1.701286@fx28.am4>

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On 6/13/2018 2:54 PM, Keith Stein wrote:
> On 13/06/2018 18:17, Volney wrote:
>> On 6/13/2018 3:20 AM, Keith Stein wrote:
> 
>>> "SECOND ELECTRON" goes from  0.0 m/s to c(nearly) in no time eh!
> 
>>>>>  >   Keith Stein wrote:
>>>>>  >
>>>>>  > Consider an electron which is stationary relative to the
>>>>>  > interplanetary medium. Speed of light relative to THAT electron
>>>>>  >  = 3*10^8 m/s (almost).
>>>>>  >
>>>>>  > Consider a second electron which is moving in the same direction as
>>>>>  > the light and at the speed of light in the interplanetary medium.
>>>>>  > Speed of light relative to THIS electron       = 0.0 m/s 
>>>>> (exactly eh!)
>>>>>
>>>>> Mr.Volney wrote:
>>>>> Yes, that can happen in theory.
>>>
>>>
>>> On 13/06/2018 05:54, Volney wrote:
>>>> On 6/12/2018 8:01 PM, Keith Stein wrote:
>>>>> Do please tell us
>>>>>     What is the speed of light in interplanetary vacuum, relative to 
>>>> .     frame of reference in which my second electron is stationary ?
>>>>
>>>> c/n+v(1-1/n^2), where n is nearly exactly 1.
>>
>> So? SO Putting n=1 we discover that now you are telling me
>  >>>>  speed of light in interplanetary vacuum, relative to
>  >>>>  frame of reference in which my second electron is stationary = C

Very good! If we have n=1 (exactly) then we have a perfect vacuum, and 
that means the speed of light = c relative to everything, including your 
electron.
> 
> 
> WHEREAS ONLY 2 DAYS EARLIER YOU HAD AGREED (correctly in fact)
> that the speed of light relative to that sacond electron was zero.
> 
> keith stein wrote:
>  >>>>  > Consider a second electron which is moving in the same
>  >>>>  > direction as the light and at the speed of light in the
>  >>>>  > interplanetary medium.
>  >>>>  > Speed of light relative to THIS electron       = 0.0 m/s
> 
>  >>>> Mr.Volney wrote:
>  >>>> Yes, that can happen in theory.
> 
> 
> So which is it Mr.Volney, 0.0 m/s (exactly) or 3*10^8 m/s (nearly)

You were discussing a very thin medium, with n=1.0000000000001 or 
something, perhaps. In theory, there could be electrons exceeding the 
speed of light in that medium if they had extreme energy. However, if 
n=1 (exactly), we have a perfect vacuum, and the speed of light is now c 
relative to all observers, and it is impossible to provide your electron 
with enough energy to have it move at the same speed as light (which is c).

Thread

Light and modern physics numbernumber1964@gmail.com - 2018-06-12 09:05 -0700
  Re: Light and modern physics Keith Stein <keithstein111@gmail.com> - 2018-06-12 20:26 +0100
    Re: Light and modern physics Volney <volney@volney.invalid> - 2018-06-12 16:34 -0400
      Re: Light and modern physics Keith Stein <keithstein111@gmail.com> - 2018-06-13 01:01 +0100
        Re: Light and modern physics Volney <volney@volney.invalid> - 2018-06-13 00:54 -0400
          Re: Light and modern physics Keith Stein <keithstein111@gmail.com> - 2018-06-13 08:20 +0100
            Re: Light and modern physics Volney <volney@volney.invalid> - 2018-06-13 13:17 -0400
              Re: Light and modern physics Keith Stein <keithstein111@gmail.com> - 2018-06-13 19:54 +0100
                Re: Light and modern physics Volney <volney@volney.invalid> - 2018-06-13 17:11 -0400
                Re: Light and modern physics Keith Stein <keithstein111@gmail.com> - 2018-06-15 11:40 +0100
                Re: Light and modern physics Volney <volney@volney.invalid> - 2018-06-15 14:26 -0400
    Re: Light and modern physics mitchrae3323@gmail.com - 2018-06-13 15:51 -0700
  Re: Light and modern physics numbernumber1964@gmail.com - 2018-06-12 13:37 -0700
    Re: Light and modern physics Keith Stein <keithstein111@gmail.com> - 2018-06-13 08:31 +0100
  Re: Light and modern physics numbernumber1964@gmail.com - 2018-06-12 13:41 -0700
    Re: Light and modern physics Steve BH <sbharris@gmail.com> - 2018-06-12 20:21 -0700
    Re: Light and modern physics John Gogo <jfgogo22@yahoo.com> - 2018-06-18 19:07 -0700
  Re: Light and modern physics numbernumber1964@gmail.com - 2018-06-12 13:43 -0700
  Re: Light and modern physics numbernumber1964@gmail.com - 2018-06-12 13:45 -0700
  Re: Light and modern physics furthermore7990662@gmail.com - 2018-06-12 17:08 -0700
  Re: Light and modern physics furthermore7990662@gmail.com - 2018-06-12 17:09 -0700
  Re: Light and modern physics furthermore7990662@gmail.com - 2018-06-13 10:52 -0700
  Re: Light and modern physics furthermore7990662@gmail.com - 2018-06-13 10:55 -0700
  Re: Light and modern physics furthermore7990662@gmail.com - 2018-06-13 10:56 -0700
  Re: Light and modern physics numbernumber1964@gmail.com - 2018-06-13 13:41 -0700
    Re: Light and modern physics Keith Stein <keithstein111@gmail.com> - 2018-06-13 22:03 +0100
      Re: Light and modern physics mitchrae3323@gmail.com - 2018-06-13 16:01 -0700
  Re: Light and modern physics numbernumber1964@gmail.com - 2018-06-13 14:50 -0700
  Re: Light and modern physics numbernumber1964@gmail.com - 2018-06-13 14:52 -0700
  Re: Light and modern physics numbernumber1964@gmail.com - 2018-06-13 16:07 -0700
  Re: Light and modern physics furthermore7990662@gmail.com - 2018-06-15 11:30 -0700
    Re: Light and modern physics Volney <volney@volney.invalid> - 2018-06-15 15:03 -0400
  Re: Light and modern physics furthermore7990662@gmail.com - 2018-06-15 13:21 -0700
  Re: Light and modern physics numbernumber1964@gmail.com - 2018-06-18 14:57 -0700

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