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Re: What is the speed of light????

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On 4/6/2023 12:05 AM, gehan.am...@gmail.com wrote:
> On Thursday, April 6, 2023 at 8:52:06 AM UTC+5, whodat wrote:
>> On 4/5/2023 8:32 PM, gehan.am...@gmail.com wrote:
>>> On Thursday, April 6, 2023 at 1:30:06 AM UTC+5, whodat wrote:
>>>> On 4/5/2023 12:02 AM, Sylvia Else wrote:
>>>>> On 30-Jan-23 6:57 am, The Starmaker wrote:
>>>>>> I know you're not suppose to ask this question...
>>>>>> worse yet, you're not even suppose to answer it..
>>>>>
>>>>> That seems a strange claim.
>>>>>
>>>>> It's exactly 299,792,458 metres per second.
>>>>>
>>>>> Sylvia.
>>>> We pick some star approximately 20 light years from earth. We
>>>> then predict its location for some time in the future based on
>>>> hitting that star based the speed of light you have defined for
>>>> us. If we dispatch a three second beam of light at the future
>>>> location of that star will our beam of light actually hit it?
>>>>
>>>> This question is based on our knowledge of the path traveled by
>>>> our light beam appears to be a straight line while in reality
>>>> our beam of light will travel a somewhat longer geodesic path
>>>> that we cannot define.
>>>>
>>>> Hint: there's more than one problem involved.
>>>
>>> Why can't it be defined?
>> Please tell us how to define the geodesic that light will
>> travel to a star some 20 light years present.
>>> This does not bode well for interstellar travel.
>> Howso? Are you suggesting that space vehicles cannot travel in
>> straight lines?
> 
> Question:
> Please tell us how to define the geodesic that light will
> travel to a star some 20 light years present.
> 
> Answer:
> To define the geodesic that light will travel to a star 20 light-years away, we need to first understand what a geodesic is. In general relativity, a geodesic is the shortest path between two points in spacetime. It is the path that an object with no forces acting on it would naturally follow through curved space-time.

<https://m.cas.oslo.no/getfile.php/137560-1458045883/6_CAS-publikasjoner/Seminar_booklets/PDF/0809Raynaud.pdf>

General relativity is a model, perhaps modeling some reality, perhaps
not. The significant questions revolve around what is the relationship
between model you mention and the realities posed by my question.

"John Bell, a physicist from Northern Ireland, made an important
breakthrough in 1964, devising a theoretical test to show that the
hidden variables Einstein had in mind don't exist."

<https://www.sciencealert.com/scientists-win-physics-nobel-prize-for-proving-einstein-wrong>

I realize that this is a mix and match, but when the castle walls
begin to crumble, a total collapse is almost always imminent. In
1920 Einstein recanted abandoning an aether. In 2020 Bell and others
contribution. Still, even today, we cannot define what space
and/or space/time is. We merely poke around some aspects of its
most obvious behavior. That's where my questions fall as well.

<snip balance of the post>

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Re: What is the speed of light???? Sylvia Else <sylvia@email.invalid> - 2023-04-05 15:02 +1000
  Re: What is the speed of light???? whodat <whodaat@void.nowgre.com> - 2023-04-05 15:30 -0500
    Re: What is the speed of light???? "gehan.am...@gmail.com" <gehan.ameresekere@gmail.com> - 2023-04-05 18:32 -0700
      Re: What is the speed of light???? whodat <whodaat@void.nowgre.com> - 2023-04-05 22:52 -0500
        Re: What is the speed of light???? "gehan.am...@gmail.com" <gehan.ameresekere@gmail.com> - 2023-04-05 22:05 -0700
          Re: What is the speed of light???? whodat <whodaat@void.nowgre.com> - 2023-04-06 10:20 -0500
            Re: What is the speed of light???? Maciej Wozniak <maluwozniak@gmail.com> - 2023-04-06 08:27 -0700

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