#specialrelativity — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #specialrelativity, aggregated by home.social.
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Anyone here able to explain a formula in Wikipedia about the Tolman Paradox?
https://en.wikipedia.org/wiki/Tachyonic_antitelephone#Two-way_example
The t' definition is a mystery to me. How would we drop in c to get the unit of time? How come a is multiplied with v?
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Anyone here able to explain a formula in Wikipedia about the Tolman Paradox?
https://en.wikipedia.org/wiki/Tachyonic_antitelephone#Two-way_example
The t' definition is a mystery to me. How would we drop in c to get the unit of time? How come a is multiplied with v?
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Anyone here able to explain a formula in Wikipedia about the Tolman Paradox?
https://en.wikipedia.org/wiki/Tachyonic_antitelephone#Two-way_example
The t' definition is a mystery to me. How would we drop in c to get the unit of time? How come a is multiplied with v?
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Anyone here able to explain a formula in Wikipedia about the Tolman Paradox?
https://en.wikipedia.org/wiki/Tachyonic_antitelephone#Two-way_example
The t' definition is a mystery to me. How would we drop in c to get the unit of time? How come a is multiplied with v?
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Anyone here able to explain a formula in Wikipedia about the Tolman Paradox?
https://en.wikipedia.org/wiki/Tachyonic_antitelephone#Two-way_example
The t' definition is a mystery to me. How would we drop in c to get the unit of time? How come a is multiplied with v?
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Your driving a car at 100 km/h. Someone passes you doing 10 km/h relative to you.
So they're driving at 110 km/h?
Yes... and no.
Simply adding velocities is a Galilean transformation between your frame of reference and the road's - the relativity of Newtonian mechanics (Newts three laws etc.)
However, turns out to be incorrect... negligibly noticeable here, very noticeable for relative speeds "near" the speed of light.
Just one fascinating consequence of SR.
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#Physics #SpecialRelativity I'm about to, yet again, run an online course in Special Relativity (SR) for high school physics teachers. I was going to say "local" but I have two from interstate (WA), and even two from NZ!
I was wondering if there's something *you* don't understand / are confused about, and would like to ask, related to basics of SR (no acceleration / high school level) - "my students" might also want to know!
[Note: answering on social media has limits, but I'll try my best.]
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Light can travel for billions of years yet experience no time
A photon emitted from a …
#NewsBeep #News #Physics #CA #Canada #Einstein #Einsteinspacetime #Feynmanrelativity #GPS #lightclockexperiment #Minkowski #Photons #physicsoftime #propertime #propertimephotons #relativityinreallife #research #Science #SpaceNews #Spacetime #specialrelativity #specialrelativityexplained #speedoflight #speedoflighttheory #timedilation #timedilationphysics #timestopsforlight
https://www.newsbeep.com/ca/580641/ -
https://www.europesays.com/ie/418909/ Light can travel for billions of years yet experience no time #Einstein #EinsteinSpacetime #Éire #FeynmanRelativity #GPS #IE #Ireland #LightClockExperiment #Minkowski #Photons #Physics #PhysicsOfTime #ProperTime #ProperTimePhotons #RelativityInRealLife #Research #Science #SpaceNews #Spacetime #SpecialRelativity #SpecialRelativityExplained #SpeedOfLight #SpeedOfLightTheory #TimeDilation #TimeDilationPhysics #TimeStopsForLight
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Light can travel for billions of years yet experience no time
A photon emitted from…
#NewsBeep #News #Physics #AU #Australia #Einstein #Einsteinspacetime #Feynmanrelativity #GPS #lightclockexperiment #Minkowski #photons #physicsoftime #propertime #propertimephotons #relativityinreallife #research #Science #SpaceNews #Spacetime #specialrelativity #specialrelativityexplained #speedoflight #speedoflighttheory #timedilation #timedilationphysics #timestopsforlight
https://www.newsbeep.com/au/583257/ -
Light can travel for billions of years yet experience no time
A photon emitted from…
#NewsBeep #News #Physics #AU #Australia #Einstein #Einsteinspacetime #Feynmanrelativity #GPS #lightclockexperiment #Minkowski #photons #physicsoftime #propertime #propertimephotons #relativityinreallife #research #Science #SpaceNews #Spacetime #specialrelativity #specialrelativityexplained #speedoflight #speedoflighttheory #timedilation #timedilationphysics #timestopsforlight
https://www.newsbeep.com/au/583257/ -
https://www.europesays.com/uk/869523/ Light can travel for billions of years yet experience no time #Einstein #EinsteinSpacetime #FeynmanRelativity #GPs #LightClockExperiment #Minkowski #photons #Physics #PhysicsOfTime #ProperTime #ProperTimePhotons #RelativityInRealLife #Research #Science #SpaceNews #spacetime #SpecialRelativity #SpecialRelativityExplained #SpeedOfLight #SpeedOfLightTheory #TimeDilation #TimeDilationPhysics #TimeStopsForLight #UK #UnitedKingdom
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https://www.europesays.com/uk/857323/ Distance in space is an illusion #AdSCFTCorrespondence #Astronomy #Astrophysics #DistanceInSpace #Einstein #EREqualsEPR #GeneralRelativity #HolographicPrinciple #JuanMaldacena #LoopQuantumGravity #Physics #QuantumEntanglement #Research #Science #SpaceNews #SpacetimeCurvature #SpecialRelativity #UK #UnitedKingdom
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Distance in space is an illusion
Andromeda sounds far away because 2.5 million light-years sounds far away. It lands with authority. It fe…
#NewsBeep #News #US #USA #UnitedStates #UnitedStatesOfAmerica #Physics #AdSCFTcorrespondence #Astronomy #Astrophysics #distanceinspace #Einstein #ERequalsEPR #GeneralRelativity #holographicprinciple #JuanMaldacena #loopquantumgravity #QuantumEntanglement #Research #Science #SpaceNews #spacetimecurvature #specialrelativity
https://www.newsbeep.com/us/551357/ -
Distance in space is an illusion
Andromeda sounds far away because 2.5 million light-years sounds far away. It lands with authority. It fe…
#NewsBeep #News #US #USA #UnitedStates #UnitedStatesOfAmerica #Physics #AdSCFTcorrespondence #Astronomy #Astrophysics #distanceinspace #Einstein #ERequalsEPR #GeneralRelativity #holographicprinciple #JuanMaldacena #loopquantumgravity #QuantumEntanglement #Research #Science #SpaceNews #spacetimecurvature #specialrelativity
https://www.newsbeep.com/us/551357/ -
https://www.europesays.com/ie/408924/ Distance in space is an illusion #AdSCFTCorrespondence #Astronomy #astrophysics #DistanceInSpace #Einstein #Éire #EREqualsEPR #GeneralRelativity #HolographicPrinciple #IE #Ireland #JuanMaldacena #LoopQuantumGravity #QuantumEntanglement #Research #Science #Space #SpaceNews #SpacetimeCurvature #SpecialRelativity
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Special Relativity: When you move a clock, it is slower as when it just sits there. When stopped, it runs with the normal speed again. (All relative to the non-moving observer.)
How's that? There are explanations out there, but wrote it down myself to understand it better.
For fun, I added a calculator to see how bad it can get. 4 hours in a plane and your clock lags ~4 nanoseconds (ignoring gravitation).
https://miamao.de/blog/2026-01/22.Moving_Clocks_In_Special_Relativity.html
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Special Relativity: When you move a clock, it is slower as when it just sits there. When stopped, it runs with the normal speed again. (All relative to the non-moving observer.)
How's that? There are explanations out there, but wrote it down myself to understand it better.
For fun, I added a calculator to see how bad it can get. 4 hours in a plane and your clock lags ~4 nanoseconds (ignoring gravitation).
https://miamao.de/blog/2026-01/22.Moving_Clocks_In_Special_Relativity.html
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How does the Twin Paradox work in Special Relativity? There are gazillion more or less correct and useful descriptions out there.
Everyone has their preferred one. Like in University many years ago, I grok things best if I describe them in my own words. So here we go:
https://miamao.de/blog/2026-01/11.Twin_Paradox_Explained_with_the_Light_Clock.html
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How does the Twin Paradox work in Special Relativity? There are gazillion more or less correct and useful descriptions out there.
Everyone has their preferred one. Like in University many years ago, I grok things best if I describe them in my own words. So here we go:
https://miamao.de/blog/2026-01/11.Twin_Paradox_Explained_with_the_Light_Clock.html
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RE: https://mastodon.murkworks.net/@wrog/115860196660746312
Roger's having another go at explaining special relativity without complex maths. ^_^
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#Physics I encountered this misleading throwaway about #SpecialRelativity again the other day:
"We move through spacetime at speed c."
I like that, at the same time, I also discovered someone had written a paper about it, titled:
"Do Objects Move Through Space-Time at the Speed of Light? No."
It'd be an example of "Betteridge's law of headlines" except, perhaps, for the "No" at the end, which I love! 😀 More MSM articles should do that. 1/4
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Mass isn't fundamental - it's momentum you can't see in a fifth dimension.
New paper: particles are massless 5D objects. Mass = ℏk_W/c (momentum along W-axis).
Time dilation? Reduced W-oscillation when 3D velocity increases.
Entanglement? Particle-antiparticle pairs are opposite ends of a single 5D spinor.
E² = p²c² + m²c⁴ emerges automatically.
🔗 https://zenodo.org/records/17922219
#physics #QuantumMechanics #SpecialRelativity #TheoreticalPhysics #openscience #preprint
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An excellent 1964 pop sci video from the USSR, explaining special relativity in a very accessible way, newly subtitled in English:
https://youtube.com/watch?v=P_1DJhLEHEQ
#PopScience #PopSci #relativity #SpecialRelativity #einstein #AlbertEinstein #USSR
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Ever wondered how time slows near a black hole?
Compare how time flows near stars, planets & black holes interactively.
Try it now: https://stellarsnap.space/time-dilation#TimeDilation #Relativity #BlackHoles #Physics #Astronomy #Science #Astrophysics #Einstein #SpaceTime #GeneralRelativity #SpecialRelativity #Cosmos #SpacetimeCurvature #Gravity #SpaceTools #StellarSnap
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Ever wondered how time slows near a black hole?
Compare how time flows near stars, planets & black holes interactively.
Try it now: https://stellarsnap.space/time-dilation#TimeDilation #Relativity #BlackHoles #Physics #Astronomy #Science #Astrophysics #Einstein #SpaceTime #GeneralRelativity #SpecialRelativity #Cosmos #SpacetimeCurvature #Gravity #SpaceTools #StellarSnap
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Ever wondered how time slows near a black hole?
Compare how time flows near stars, planets & black holes interactively.
Try it now: https://stellarsnap.space/time-dilation#TimeDilation #Relativity #BlackHoles #Physics #Astronomy #Science #Astrophysics #Einstein #SpaceTime #GeneralRelativity #SpecialRelativity #Cosmos #SpacetimeCurvature #Gravity #SpaceTools #StellarSnap
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Ever wondered how time slows near a black hole?
Compare how time flows near stars, planets & black holes interactively.
Try it now: https://stellarsnap.space/time-dilation#TimeDilation #Relativity #BlackHoles #Physics #Astronomy #Science #Astrophysics #Einstein #SpaceTime #GeneralRelativity #SpecialRelativity #Cosmos #SpacetimeCurvature #Gravity #SpaceTools #StellarSnap
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Ever wondered how time slows near a black hole?
Compare how time flows near stars, planets & black holes interactively.
Try it now: https://stellarsnap.space/time-dilation#TimeDilation #Relativity #BlackHoles #Physics #Astronomy #Science #Astrophysics #Einstein #SpaceTime #GeneralRelativity #SpecialRelativity #Cosmos #SpacetimeCurvature #Gravity #SpaceTools #StellarSnap
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Well, they say that if you can travel the #SpeedOfLight, you will experience #TimeDilution & your perception of time will slow down time per the theory of #SpecialRelativity but then, while your perception of your won't change significantly but everyone else not traveling w/you will age much faster than you do. You could also put your body in #Cyrostasis, not that that's even possible yet 🤷♂️
Did you ever watch the movie #Intersteller (2014)?
It will explain everything. LOL!!!😉
PS: I'm with you . . . I turn 75 & my grandchildren will turn 10 & 7 this year too. 😮
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The above, the below and the lack of relativity between them #art #illustration #quantummechanics #specialrelativity
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I've just viewed a lecture from Carlo Rovelli, an Italian physicist, about the theories of TIME. It was a fascinating lecture to hear. Frankly, it all made sense and I can't wait to get hold of his book :The Order of Time.
#Physics #QuantumMechanics #NewtonianSpace #QuantumGravity #Neurology #SpecialRelativity #SpaceTime #ArrowOfTime -
There's a #misconception about the #timespace speed limit, the speed of light. It seems that if you're determined to travel to another galaxy you won't live to see it. But the truth is that you can actually travel arbitrarily fast, if you only consider the on-board, local time. If you forget what you're leaving behind, you can go anywhere as fast as you go. The Lorentz transform will take care of everything. You can get to Andromeda in a day. You can get there in a minute. Just need to go faster. Lorentz contraction will take care of it. You can get there in a second. You can go arbitrarily fast! The outside observer will see you frozen in time when traveling.
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This is an old animation I had on VHS. I animated the train part (30 yrs ago?) with Mathematica on my NeXTdimension cube (using the graphic board NTSC Composite outputs). I renumerized it back from tape lately and added the scrolling text. Et aujourd'hui j'ai accolé l'intro musicale. Reste plus qu'à mettre des bips bips sonores lors de l'arrivée des impulsions lumineuses dans la partie 'train'...
#Physics #Einstein #SpecialRelativity #Classroom #PhysicsEducation #NeXTcomputers
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This is an old animation I had on VHS. I animated the train part (30 yrs ago?) with Mathematica on my NeXTdimension cube (using the graphic board NTSC Composite outputs). I renumerized it back from tape lately and added the scrolling text. Et aujourd'hui j'ai accolé l'intro musicale. Reste plus qu'à mettre des bips bips sonores lors de l'arrivée des impulsions lumineuses dans la partie 'train'...
#Physics #Einstein #SpecialRelativity #Classroom #PhysicsEducation #NeXTcomputers
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This is an old animation I had on VHS. I animated the train part (30 yrs ago?) with Mathematica on my NeXTdimension cube (using the graphic board NTSC Composite outputs). I renumerized it back from tape lately and added the scrolling text. Et aujourd'hui j'ai accolé l'intro musicale. Reste plus qu'à mettre des bips bips sonores lors de l'arrivée des impulsions lumineuses dans la partie 'train'...
#Physics #Einstein #SpecialRelativity #Classroom #PhysicsEducation #NeXTcomputers
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This is an old animation I had on VHS. I animated the train part (30 yrs ago?) with Mathematica on my NeXTdimension cube (using the graphic board NTSC Composite outputs). I renumerized it back from tape lately and added the scrolling text. Et aujourd'hui j'ai accolé l'intro musicale. Reste plus qu'à mettre des bips bips sonores lors de l'arrivée des impulsions lumineuses dans la partie 'train'...
#Physics #Einstein #SpecialRelativity #Classroom #PhysicsEducation #NeXTcomputers
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This is an old animation I had on VHS. I animated the train part (30 yrs ago?) with Mathematica on my NeXTdimension cube (using the graphic board NTSC Composite outputs). I renumerized it back from tape lately and added the scrolling text. Et aujourd'hui j'ai accolé l'intro musicale. Reste plus qu'à mettre des bips bips sonores lors de l'arrivée des impulsions lumineuses dans la partie 'train'...
#Physics #Einstein #SpecialRelativity #Classroom #PhysicsEducation #NeXTcomputers
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Queen '39 - Physics (Time Dilation)
> For so many years are gone
> Though I'm older but a year
> Your mother's eyes from your eyes cry to me#OddNobelPrizeASongOrPoem
#HashTagGames
#TimeDilation
#SpecialRelativity
#Physics
#BrianMay -
#Physics #SpecialRelativity Consider two relatively moving inertial reference frames (IRFs) A and B. You can select two Events for which A and B measure the *same* time interval between the two Events.
"What?" you say "But shouldn't there be time dilation?... shouldn't one measure the time interval as greater than the other?"
The time dilation equation is just one small part of a bigger picture.
As an exercise for the reader:
1/2
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For anyone who has never come across them (or for those who have forgotten) "Reflections on Relativity" is a fantastic free resource (also available as a book) that discusses foundational etc. aspects of Special and General Relativity.
Probably not a great resource for learning from(?) but a great read if you already understand a reasonable amount. There's also some other good reads / references to his books on Math Pages website.
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#Einstein’s Journey to the Second #Postulate of #SpecialRelativity : Medium
#SpaceForce’s #Mysterious X-37B is testing its ‘#Aerobraking’ : Pop Sci
How the Famous #Lucy #Fossil Revolutionized the Study of #HumanOrigins : Sci Am
Check our latest #KnowledgeLinks
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#Einstein’s Journey to the Second #Postulate of #SpecialRelativity : Medium
#SpaceForce’s #Mysterious X-37B is testing its ‘#Aerobraking’ : Pop Sci
How the Famous #Lucy #Fossil Revolutionized the Study of #HumanOrigins : Sci Am
Check our latest #KnowledgeLinks
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#Einstein’s Journey to the Second #Postulate of #SpecialRelativity : Medium
#SpaceForce’s #Mysterious X-37B is testing its ‘#Aerobraking’ : Pop Sci
How the Famous #Lucy #Fossil Revolutionized the Study of #HumanOrigins : Sci Am
Check our latest #KnowledgeLinks
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#Einstein’s Journey to the Second #Postulate of #SpecialRelativity : Medium
#SpaceForce’s #Mysterious X-37B is testing its ‘#Aerobraking’ : Pop Sci
How the Famous #Lucy #Fossil Revolutionized the Study of #HumanOrigins : Sci Am
Check our latest #KnowledgeLinks
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Rick: Sam?
Sam: Yes, boss.
Rick: If it's December 1941 in Casablanca, what time is it in New York?
Sam: What? My watched stopped.
Rick: I bet they're asleep in New York. I bet they're asleep all over America. -
#Physics You're standing on a platform at a train station and a train passes through the station at a significant fraction of the speed of light.
You can see a large clock on the front of the train as it comes towards you. The clock looks like it's running much faster than your watch.
You can see a clock on the back of the train as the train moves away from you. That clock appears to be running much slower than your watch.
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A Brief Crash Course on #TimeTravel
excerpt from #PopularMechanics by Matt Blitz…"In the 1680s, Sir #IsaacNewton thought time progressed at a consistent pace throughout the #universe, regardless of outside forces or location …
In 1905, #Einstein revealed his ideas on #specialrelativity … that time is elastic and dependent on speed, slowing down or speeding up depending on how fast an object—or person—is moving"…🔗 https://PopularMechanics.com/science/math/a20718322/building-a-time-machine/ 28 Dec 2022
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“Note that we make no distinction between a covariant and a contravariant vector, nor do we define the metric tensor g_𝝁𝝂. These complications are absolutely unnecessary in the special theory of relativity. (It is regrettable that many textbook writers do not emphasize this elementary point.)” — Sakurai, 1967, p. 6. Is he referring to scalar invariants? #ITeachPhysics #SpecialRelativity
