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Relativity And Simple Algebra

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#749 ralfcis

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Posted 09 June 2019 - 05:49 PM

Shirley, you can't be serious. Even the bumbling dimwits on here call you a bumbling dimwit and if they are incapable of understanding an STD, that's even more so true for you. Just ignore the STD if that's too much for you. Shirley you have some way to calculate the numbers, besides using a Magic 8 Ball, I've given you in my numerical example. Do you not agree with the numbers or you haven't graduated to using numbers yet? If there's no way to reach you, why are you complaining that's my problem somehow?



#750 marcospolo

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Posted 09 June 2019 - 06:04 PM

"Meaning that simply neither ship will be able to claim that the others time is slowed.  However, SR requires that BOTH ships claim that the other time is less than their own time."

 

This is the crux of the matter where your understanding falls completely apart. Your first sentence is incomplete.  Neither ship will be able to claim that the others time is slowed in relation to what? To each other or to the earth?

 

 

Now you may ask to apply the same reasoning to the planes alone. If the planes go out and come back at .6c relative to earth, their relative velocity to each other is double that for the round trip journey. Double .6c is .8824c  (15/17 c) using the relative velocity combo law.

Ok, first, the others ship time RELATIVE to its own time.  Nothing to do with Earth.

 

Relativity is between the two ships.

 

And we know what Einsteins irrational claims are about the combined speeds, but that is exactly what we are complaining about.

The only correct answer to 0.6 + 0.6 is going to be 1.2.

If you think, for some imagined reason that nothing can go that fast, then I reduced the initial ships speed to 0.4c giving a relative speed between the two of 0.8c to keep you happy.

 

You have no rational reason to use Einstein's relativistic formula of velocity additions.

EVERY experiment ever done in all mans history has verified that 0.4 + 0.4 = 0.8.



#751 ralfcis

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Posted 09 June 2019 - 06:15 PM

Like I said, if we can't agree on this, there is nothing further to discuss. 



#752 marcospolo

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Posted 09 June 2019 - 06:49 PM

Like I said, if we can't agree on this, there is nothing further to discuss. 

My discussion is aimed at getting you to justify your beliefs about relativity.  

 

I think you can't provide any rational explanation for your beliefs.

 

Not talking about it is kinda agreeing with me and verifying my claim that there is no rational basis for SR or GR, Time Dilation etc.

 

Trying to prove your case by simply applying your beliefs invarious  examples,  is not able to EXPLAIN why anyone should agree with your beliefs.



#753 ralfcis

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Posted 09 June 2019 - 07:04 PM

I gave it my best shot.



#754 marcospolo

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Posted 09 June 2019 - 09:35 PM

I gave it my best shot.

And your best shot was not useful I'm afraid. 

You framed every statement in terms that were components of the subject being challenged.

A valid explanation for your theory can't contain elements of the same theory, It's begging the question of a circular argument or whatever its called.

"Einstein is correct because Einstein says right here that he is correct". That sort of thing.



#755 ralfcis

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Posted 09 June 2019 - 10:38 PM

No your arguments are circular. You're saying relativity is not correct so you can't use it to prove its correct. I'm showing if you use it correctly, your get the correct answer. You must take relativity of simultaneity into account for a spacetime path that does not start co-located, show reciprocal time dilation exists for both ship to ship and ship to earth and as the ships get closer together to the earth, the spread in the reciprocal time dilation approaches the same time value for ship to ship and ship to earth. Co-location is the point where there is no reciprocal time dilation which depends on both velocity and distance separation. When the distance goes to zero, the velocity doesn't figure in anymore. You are concluding that by not following the rules relativity stakes out to get the right answer that relativity must be wrong instead of assuming you don't know the rules and therefore your calculation is wrong. I showed assuming earth and ship times all start out at zero according to the earth line of simultaneity, it causes a problem in the reciprocal time dilation of each ship to earth. This breaks the rules of relativity and you conclude therefore relativity must be wrong.



#756 marcospolo

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Posted 10 June 2019 - 12:41 AM

No your arguments are circular. You're saying relativity is not correct so you can't use it to prove its correct. I'm showing if you use it correctly, your get the correct answer. You must take relativity of simultaneity into account for a spacetime path that does not start co-located, show reciprocal time dilation exists for both ship to ship and ship to earth and as the ships get closer together to the earth, the spread in the reciprocal time dilation approaches the same time value for ship to ship and ship to earth. Co-location is the point where there is no reciprocal time dilation which depends on both velocity and distance separation. When the distance goes to zero, the velocity doesn't figure in anymore. You are concluding that by not following the rules relativity stakes out to get the right answer that relativity must be wrong instead of assuming you don't know the rules and therefore your calculation is wrong. I showed assuming earth and ship times all start out at zero according to the earth line of simultaneity, it causes a problem in the reciprocal time dilation of each ship to earth. This breaks the rules of relativity and you conclude therefore relativity must be wrong.

I'm saying that Relativity is not correct because the theory is nonsensical.

You are trying to show me that if you use it "correctly" you get the answer you wanted, but its, unfortunately, a nonsensical result.

Who said that the velocity doesn't count anymore when the distances are zero?

The two ships pass close by near the position E, but are and always have been moving at the same high velocity, without accelerating or decelerating.

Point E you are taking as if its the Earth, the origin of the ships, but it's not.  Point E is only the place where the initial signal originated to start the two ships off towards each other...and must, therefore, be the location where the two chips meet, (pass close by).

 

And using Minkowski's really moronic graph chart thing is not helping one bit.

 

So, either you can explain why there is a discrepancy between the two claims of relativity for the time difference between ship A and B and the other difference in time between ship A and position E.,   using the scenario as I have described, or you just say that you have no explanation unless you are allowed to change the scenario

 

What possible reason can you come up with to justify the abortion of geometry called the Minkowski Spacetime diagram?

What rational explanation is there to use a vector that is a velocity, and pretend that its a "world line"?

What is a world line anyway? Where else do you use them outside of the Minkowski imaginary world?

Ok, so rotate the "world line" to match the moving guy's velocity vector if you want, BUT then you should also rotate his velocity of Light vector to match!

Then also rotate his distance axis so that it's at right angles to his Time/worldline vector and I can sort of see what you are doing, but it's still wrong.

 

The light vector for the stationary guy can ONLY be the same vector for the moving guy if they are both located at point zero on the Z axis.  Otherwise, the light vector for the moving guy will be located somewhere along the x-axis according to where the moving guy is located.

\Minkowski does not know the difference between a grid map of positions, and a graph showing velocity along a single distance axis, plotted over time.

 

Minkowski is a deceptive bugger.



#757 ralfcis

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Posted 10 June 2019 - 06:56 AM

I've noticed a lot of really ignorant people have been leaving these forums. Do you keep in contact with them? Do you know where they went? Are you planning to follow suit? Because I'd gladly go there to answer all your questions as a group so I don't endlessly repeat myself.



#758 marcospolo

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Posted 10 June 2019 - 07:30 AM

I've noticed a lot of really ignorant people have been leaving these forums. Do you keep in contact with them? Do you know where they went? Are you planning to follow suit? Because I'd gladly go there to answer all your questions as a group so I don't endlessly repeat myself.

I like the way that relativists suddenly stop talking about Physics, and start talking about unrelated issues when they no longer have any sensible replies.

You just decide all of a sudden to not address the issues.

Because you have no repliy that is going to seem reasonable.

There is exacly no way in hell you can justify Minkowski's irrational plot/graph messes.

And there is equally no way to explain time dilation that stands up to reason.



#759 sluggo

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Posted 10 June 2019 - 07:52 AM

Marcos#746;
 

In any case here are MY workings using Einstein’s Time Dilation, to show why it’s stupid.
A and B have a velocity relative to E which is 0.4 c. This means a reduction of 91.65% of moving time, for E’s time. i.e  100 minutes on A or B’s clocks will be only 91.65 minutes on E’s clock.
Relative to E, both A and B say that there is an 8.35-minute loss for the E clock compared to theirs.

BUT as we are mostly interested in looking at the relative time dilation between A and B, we can forget about E for the moment.
The relative velocity between A and B is exactly 0.8c which will result in a time dilation of 60%.
Meaning that for A who measures 100 minutes on his clock, he will claim that B’s clock only recorded 60 minutes!
So now that’s a difference of 40 minutes of lost time on B’s clock, compared to A’s clock.
BUT when we actually compared all clocks when all three players were at the same place in space and in time, (at location E) there was a calculated difference of 8.35 minutes between A and B’s clocks compared to E’s clock!  Meaning that A’s clock was IDENTICAL to B’s clock at that exact moment.
So what is it? If both A and B agree that the E’s clock has lost 8.35 minutes, then that MUST mean that A’s clock is identical to B’s at that moment. And that’s exactly what rationality indicates.
So how can it be possible that at that exact same moment, there can be a 40-minute difference between A and B clocks?
Of course, smart people will know that the 8.35-minute loss was just as much an error as the 40-minute error.
This whole scenario only works out rationally, logically and mathematically if you use classical rules of Physics and Math.
Then you get the logical result where A=E=C. As any sane person would expect.
If you are going to reply to this with some other weird logic, I ask that to keep the problem simple, by restricting the whole situation to the point of view of just ONE observer, say observer A.

 


[In the following the B path is a mirror image of the A path.
If E is a common rest frame, then the A-clock will run slower than the E-clock by a factor of .92. If the A=clock shows 100 then the E-clock shows 109.
(you have the relation of frames reversed)

The speed of B relative to A is .80/1.16 = .69c giving a clock rate of .52.*
They simply add in Newtonian physics but not in SR.
Why would you mix Newtonian and SR methods?]

*[In the graphic while A and B approach E, A sends a signal (123) to B for a distance measurement. Event 3 is horizontally transferred to the vertical At time scale. The distance is d. The 2nd distance is 0 when A and B meet. The speed of B relative to A is line (1-5)/ line (1-4) = .69c. This geometric method is in agreement with the SR composition of velocities.]

[Your example shows you don't understand SR, and want to remain in the Newtonian/Galilean world of absolute concepts. Good luck with that.]

marcos tringl.jpg



#760 marcospolo

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Posted 10 June 2019 - 04:52 PM

Marcos#746;
 

[In the following the B path is a mirror image of the A path.
If E is a common rest frame, then the A-clock will run slower than the E-clock by a factor of .92. If the A=clock shows 100 then the E-clock shows 109.
(you have the relation of frames reversed)

The speed of B relative to A is .80/1.16 = .69c giving a clock rate of .52.*
They simply add in Newtonian physics but not in SR.
Why would you mix Newtonian and SR methods?]

*[In the graphic while A and B approach E, A sends a signal (123) to B for a distance measurement. Event 3 is horizontally transferred to the vertical At time scale. The distance is d. The 2nd distance is 0 when A and B meet. The speed of B relative to A is line (1-5)/ line (1-4) = .69c. This geometric method is in agreement with the SR composition of velocities.]

[Your example shows you don't understand SR, and want to remain in the Newtonian/Galilean world of absolute concepts. Good luck with that.]

attachicon.gifmarcos tringl.jpg

I know how you can get this result.  I see what you are doing.   But its rubbish.

Before you can use Minkowski diagrams, you have to prove that they mean something related to physics.  They are just foolish abortions of geometry, nothing more. You cant explain WHY anyone in their right mind should change a velocity vector into a "world line" and then you have no rational excuse to claim that this new Time axis should be mirrored about the 45-degree velocity vector of light.

 

And since the Minkowski diagram is based on SR, it can't be used to prove SR.  It may be used once one accepts the hypothesis of SR as a way to explain the twisted logic.

 

So I repeat, its no point in using math of geometry to derive your results, before you can explain how he concept can be anything but irrational posturings.

 

What is the reason for having two calculations for the velocity of the one spaceship relative to the other one?  

Rational logical thought says that once you know the speed of A and B then there can be no further knowledge to be had about this scenario.

 

What you are saying is a direct contradiction, one object has two velocities.  It CANT.

Explain the logic behind your claim, then if its sound, we can look at how you come up with the exact numbers. Using Minkowski diagram if you want, but only after you explain why that horrible crap could be possible.

 

Or use your Lorentz contraction equations, but once again you need to demonstrate that the equation is based on sound logic. It isn't.

 

So first up, before you say anything else, explain how it's possible for one object to possess two different speeds.

 

We only have 3 objects here. 2 ships, and one tree (E)  we know the locations of all three objects, and the speeds of the two ships relative to the tree, therefore by deductive reasoning, we know the speed of the two ships relative to each other. 

 

So go ahead, explain why this it wrong, and the ships possess two speeds.

 

I'm looking at these three objects from a reference place that places the tree as a non-moving object, as are the occupants of the shipos, they also use the tree as their reference for velocity.

 

Now please proceed with your explanation.  You cant use any math or weird diagrams based on your explanation until we can see that your explanation is rational and logical.  Graphs and math don't EXPLAIN how it works, they just allow you to come up with working examples based on your hypothesis, so they are NOT necessary to use in an explanation of the Hypothesis.

 

Einstein in his 1905 paper attempted to hypothesize that a single pulse of light would do two different things if seen from two different vantage points. He then used math to provide working examples.

But trouble is, his hypothesis about the two things light would do at the same time, was totally flawed. Its an irrational and impossible claim.

So to be clear, I need you to only explain one thing.

How it's possible to have two have the ships going at two different speeds when we are observing the whole scenario as a single process.

We are not hopping between reference frames, we are watching all three objects and it's  IMPOSSIBLE that a ship can have two different velocities.  If something is IMPOSSIBLE, its IMPOSSIBLE in another frame of reference too.



#761 sluggo

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Posted 11 June 2019 - 11:01 AM

I know how you can get this result.  I see what you are doing.   But its rubbish.

 

 

 

Then there is no answer acceptable to you.



#762 marcospolo

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Posted 11 June 2019 - 06:52 PM

Then there is no answer acceptable to you.

I do fully accept RATIONAL answers, based on sound logic.   The spacetime diagram is just distorting the facts by incorrectly creatioing relationships that were never explained rationally in the first instance.  You cant justify the way that a STD is generated or explain why we are reading it that way we do.  

 

I cant accept explanations as to HOW SR time dilation works,, that involve the inteprettion of such a dubious mechanism as the STD.

 

If you are going to explain how the many obvious errors in SR are not in fact errors at all. then you need to come up with something better than the STD.





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