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Everything posted by Ghideon
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Gravity is limited to a range extendable with the speed of light c
Ghideon replied to awaterpon's topic in Speculations
Good point. Probably the mixing of static and dynamic situations* for both gravity and electromagnetism is the main reason behind the proposals made by OP. I asked you to analyse your proposed equation for gravity but I see no response. So here are some comments. As Swanson pointed out you seem so mix static and dynamic things. Here is Newton: [math]F=G \frac{m_{1} m_{2}}{ r^{2} }[/math] Note: there is no time dependency as far as I can see. Here is your modified version. I have changed into what I think you mean, you have not yet responded to my request to take the changing radius into account. This is a best guess: [math]f()=G \frac{m_{1} m_{2}}{ r^{2}(t) } (1-\frac{ | r'(t) | t}{c( t_{0} +t)} )[/math] Assumptions made by me: Since you introduced radial velocity [math]v[/math], radius [math]r[/math] is not constant. So I assume you mean [math]r[/math] as function of time; [math]r(t)[/math]. [math]r(t)[/math] depends on radial velocity [math]v[/math] so I assume [math]v[/math] is time derivate of [math]r[/math], [math]r'(t)[/math]. You stated that direction of the radial velocity is not important, so I use absolute value [math]| r'(t) |[/math]. I assume [math]T[/math] and [math]t[/math] uses same changing time component so [math]T[/math] is some starting time [math]t_{0}[/math]+ elapsed time [math]t[/math]. Instead of an equation from Newton we now seem to have a differential equation. Questions: Do you see what strange things this equation suggests? Hint: what would happen, according to your math, to two ideal pendulums, started at different times? Do you see how it seems to differ from the predictions in mainstream physics, how it can be tested and how its is most likely going to fail such test? Maybe it is time to start from scratch, asking questions about mainstream physics in an appropriate mainstream section of this forum? *) I remember many years ago when I studied. Static and dynamic mechanics were separate courses, first static then dynamic Newtonian mechanics. -
Gravity is limited to a range extendable with the speed of light c
Ghideon replied to awaterpon's topic in Speculations
What mistake in current physics? Speed of light in vacuum known, tested and included in the mainstream formulas. Lets focus on the modified version of Newtons equations that you have proposed. It is already known that Newton does not take gravitational waves, invariant speed of light in vacuum, time dilation and other things that Einsteins relativity handles (SR, GR). There are situations where Newton mechanics applies and situations where Newton mechanics does not apply. Einstein's equations applies to a broader set of situations* and will look like Newton for the situations where Newton applies. Take a look at the https://en.wikipedia.org/wiki/Lorentz_factor for instance: [math]\gamma ={\frac {1}{{\sqrt {1-({\frac {v}{c}})^{2}}}}}[/math] Very simply put: for speeds much less than c the factor very close to 1; Newton and Einstein gives same result unless high precision is required. So there is no need for new equations to cover the issues you describe, you just have to know when and where to use the existing equations from mainstream physics. How do we test that your equation predicts gravitational effects better than Newton and Einstein? Have you analysed your suggested equation for gravity and seen it's implications? The way you have introduced c and t seems to imply some really strange behavior if I understand your descriptions. Hint: take a look at the connection between r, v and t in what you have stated so far. Since this is speculation section I'll let you will work out the details *) Higher speeds for instance. There are also situations where more work is needed; As far as I know GR does not work good for the center of black holes for instance. -
Gravity is limited to a range extendable with the speed of light c
Ghideon replied to awaterpon's topic in Speculations
Can you show the math? So far I have seen an equation for your proposed modification of Newtons mechanics. -
Gravity is limited to a range extendable with the speed of light c
Ghideon replied to awaterpon's topic in Speculations
I think that it is already well established knowledge, according to current physics. It does not test the new equation you suggested. -
Gravity is limited to a range extendable with the speed of light c
Ghideon replied to awaterpon's topic in Speculations
Here are some additional questions regarding the predictions of the proposed equation: When does the equation apply? How can it be tested? Since matter does not seem to pop into existence, what is the value of T when testing? We have: Perfect circular motion: [math]v=0[/math], no effect from the added parameters. Speeds [math]v[/math] close to [math]c[/math]: the equation gives incorrect results (while GR predictions matches observations). For [math]v<<c[/math] we know Newton is a good approximation. Example: space missions using gravity assist* seems to work. So, what situations requires the modifications you suggest? I think you would have to show how Keplers laws are affected and how observations matches your equations. One more; since the distance r seems to depend on v and on t, can you write out the equation taking this into account? *) https://en.wikipedia.org/wiki/Gravity_assist -
Michelson Morley experiment is no confirmation of Special Relativity
Ghideon replied to vanholten's topic in Speculations
I did not know of Demjanov so I searched. Results supports Strange's comment: "Physical interpretation of the fringe shift measured on Michelson interferometer in optical media" paper was retracted by the editors of Physics Letters A. www.sciencedirect.com -
Gravity is limited to a range extendable with the speed of light c
Ghideon replied to awaterpon's topic in Speculations
There seems to be several things proposed by your equation: You are using speed to measure relative movement of masses m1 and m2, not velocity. The direction of movement is not important? How is that compatible with Newton where forces, acceleration etc are vectors? Since, according to you, gravity decreases with increasing speed v, regardless of direction, how does that affect orbital motion of planets etc? Note that GR already exists and observations support GR. Your equation seems to predict a different behavior. What mechanism do you suggest to make mass "pop into existence" so your equation can be tested? -
Cosmic filaments and universe expansion
Ghideon replied to Ghideon's topic in Astronomy and Cosmology
I think I found my issue in @StringJunky's reference, co-moving coordinates! Short explanation, I'll try posting a better followup if I understand more details later. Evolution of structures in a 43 million parsecs (or 140 million light years) box, taken from a simulation. Showing two frames; early universe and present epoch: From the above two frames it looks to me like the density on large scales is the same. The same amount of matter in a 140 million light years box in two different configurations. What I have missed is that such models and simulations can use different coordinate systems, the side of the box is not necessarily 140 million light years in proper distance. From the reference: On large scales seen here, gravity cannot compete with the dark energy-driven acceleration and the growth of structures ceases. As the contraction of large-scale structures is halted they expand with the universe and appear "frozen" in our co-moving system of coordinates. -
Gravity is limited to a range extendable with the speed of light c
Ghideon replied to awaterpon's topic in Speculations
Is this the correct equation according to your idea? [math]F=G\frac{ m_{1} m_{2} }{ r^{2} } (1- \frac{vt}{cT} )[/math] Can you provide some more explanations what t and v is? When is t=0 for instance. I'm not sure mass will "come from nowhere", but lets assume it can, just as a test; assuming t=1 and v=1, for short times T, it seems that gravity force is negative: [math]T<\frac{1}{c}, t=1, v=1 \rightarrow (1- \frac{vt}{cT}) <0)[/math] Is that correct? -
Gravity is limited to a range extendable with the speed of light c
Ghideon replied to awaterpon's topic in Speculations
I tried earlier to make a short comment on infinity, zero and limits using math*. Did you read it? Newton: [math] \lim_{r \rightarrow \infty } G\frac{ m_{1} m_{2}}{r^{2}} =0[/math] At infinitely large distance the gravitational force is infinitely small. Any change will happen in an infinitely short time. General Relativity: It takes an infinite time for a gravitational wave to reach infinite distance and the wave will be infinitely weak. *) Not necessarily mathematically formally correct, hopefully correct enough to make a point. I do not possess the knowledge to write down the correct math for GR. -
Gravity is limited to a range extendable with the speed of light c
Ghideon replied to awaterpon's topic in Speculations
Sounds like General relativity: https://en.wikipedia.org/wiki/General_relativity -
Ok, the discussion is about one personal interpretation of writings in a book then. There are many interpretations.
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Cosmic filaments and universe expansion
Ghideon replied to Ghideon's topic in Astronomy and Cosmology
Thanks for your answers @StringJunky and @beecee. I’ll have to study the topic some more, and I’ll likely post additional questions later. -
Which version of the book contains the word ”multiverse”?
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My understanding is that observations supports that universe has a large scale structure consisting of large voids with lower density and filaments with higher density. How are the filaments affected by the expansion of the universe? My best guess is that the voids expand and the filaments stretch. This page forbes.com/startswithabang/cosmic-superclusters has a pretty good pop-sci explanation. Filaments stretching and dissolving can also be found for example here: medium.com/starts-with-a-bang. My reason for asking is that I’m somewhat confused by other descriptions where filaments consists of gravitationally bound matter, for instance wikipedia.org/Galaxy_filament. To me “gravitationally bound” and “dissolving” sounds like a contradiction which probably means I have misunderstood something. An example of the structure; results of a digital simulation showing the large-scale distribution of matter, with filaments and knots: Université de Genève. (2015, December 2). The cosmic web: Seeing what makes up the universe. ScienceDaily. Retrieved April 13, 2019 from www.sciencedaily.com/releases/2015/12/151202132934.htm
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I think you have to do your homework regarding forum rules.
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1: You keep on repeating this. As a comparison, can you please define what a closed loop is then? The reference https://apps.dtic.mil/dtic/tr/fulltext/u2/a170203.pdf you provide does not mention what an open vs closed loop is. When looking for references for closed vs open loop devices and sagnac effects I find several references** to that seems more targeted towards open-loop / closed-loop control*. 2: Why do you keep dodging my questions regarding subquarks? *) https://en.wikipedia.org/wiki/Open-loop_controller **)https://file.scirp.org/pdf/OPJ20120100010_57872338.pdf, https://books.google.se/books?open vs closed loop
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Gravity is limited to a range extendable with the speed of light c
Ghideon replied to awaterpon's topic in Speculations
You can look at my last question as a start -
Why did you introduce subquarks in this thread? Can we safely assume that subquarks are an irrelevant addition you made?
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Why did you introduce subquarks in the thread? How is it relevant and connected to your speculation in this thread?
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Standing waves (Split from EM waves with astronomical wavelength)
Ghideon replied to RayTomes's topic in Speculations
Can you define standing wave and wavelength in this context? What coordinates are you using? Universe is expanding, galaxy clusters are moving when time scales are hundreds of million years. -
Then please answer my question, so I may have something worth analyzing: why did you introduce subquarks in the thread? How was it relevant?
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Sorry, that is not how this forum works. Indeed I do homework from time to time, in much less speculative and more productive areas of science.
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Then why did you introduce subquarks in the thread? How was it relevant? It does not improve the credibility of the speculations you provide regarding light.
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I don't think your style of discussion works well on this forum. It may be successful in other contexts. bold by me: I don't think the concept of quarks was introduced until much later.