Join in expert discussion on special and general relativity discussion. Relativity is the dependence of various physical phenomena on relative motion of the observer and the observed objects.
Threads
Graduate Clock synchronization and relativity of simultaneity
- Fantasist
- · Replies 47 ·
Graduate Grabbing Hands at Speed of Light: What Happens?
- JBou
- · Replies 15 ·
Graduate Time Misured by Clock in Non Inertial Sistem?
- Andre' Quanta
- · Replies 12 ·
Undergrad The Minimum Speed in the Universe: An Exploration of the Cosmic Limit
- Nick666
- · Replies 61 ·
Graduate Are photon energies constant for any observers?
- jcap
- · Replies 3 ·
Graduate Viewing Miller's Planet from Earth Time: Time Dilation Mystery
- fayaazhussain
- · Replies 3 ·
Graduate What Do Lance Warriors See When Stabbing Each Other?
- sunmaggot
- · Replies 7 ·
Undergrad Some Interesting Problems (Reference Frame)
- Quarlep
- · Replies 17 ·
Graduate Simplifying Tensor Equations for Beginners
- beyondthemaths
- · Replies 24 ·
Graduate Does Hoyle C field violate conservation of energy-momentum?
- bcrowell
- · Replies 33 ·
Undergrad Explore Relativistic Effects in "A Slower Speed of Light" Game by MIT Game Lab
- ShayanJ
- · Replies 6 ·
Graduate Is Hawking Radiation a Kinematic Effect or a Real Phenomenon?
- ChrisVer
- · Replies 21 ·
Graduate Deriving Einstein Tensor & Inverse for Gϴdel Metric in Cartesian Coordinates
- space-time
- · Replies 11 ·
Graduate What breaks the symmetry in the twin paradox?
- Stephanus
- · Replies 6 ·
Graduate Schwarzschild, Singularity, Density
- Stephanus
- · Replies 13 ·
Graduate Charge's Frame: Electric Field of Moving Charge
- unscientific
- · Replies 7 ·
Graduate Cosmological constant term and metric tensor
- exponent137
- · Replies 5 ·
Graduate Understanding the Classical Euclidean Action in Quantum Field Theory
- spaghetti3451
- · Replies 8 ·
Graduate Why is the fabric of space and time always portrayed flat?
- DastardlyBliss
- · Replies 16 ·
Graduate Problem Perceiving Simultaneity (Special Relativity)
- Heatherfield
- · Replies 3 ·
Graduate Relativistic centripetal force is a byproduct of time
- Somsak
- · Replies 23 ·
Graduate Unit Error in Oppenheimer-Snyder 1939 Paper?
- RogueBanana
- · Replies 1 ·
Graduate Deriving geodesic equation from energy-momentum conservation
- dpdt
- · Replies 6 ·
Graduate Gravitational Time Dilation at Event Horizon
- mjordan2nd
- · Replies 3 ·
Graduate Wikipedia article: No time in General Relativity
- Nick666
- · Replies 4 ·
Graduate Does GR reduce gravitational force on a planet's surface?
- Shaw
- · Replies 28 ·
High School What causes magnetic repulsion and attraction?
- Prashan Shan
- · Replies 13 ·
Graduate Do Photons Experience Time Dilation and Redshift?
- Physt
- · Replies 8 ·
Graduate De Sitter Vacuum: Is it the Only Positive CC Solution?
- wabbit
- · Replies 4 ·
Graduate What is the Meaning of r in Schwartzschild Metric?
- jstrunk
- · Replies 9 ·
Graduate Interactive Minkowski diagrams tool
- Ibix
- · Replies 34 ·
Undergrad Minimum energy to accelerate a mass?
- jerromyjon
- · Replies 6 ·
Graduate Time Dilation happens on moving frame - but which one?
- controlfreak
- · Replies 7 ·
Graduate Do Moving Observers See Simultaneous Flashes from Stationary Light Sources?
- johann1301
- · Replies 21 ·
Graduate Is Photon Mass a Reality Despite Its Momentum and Energy?
- Ferdricklove
- · Replies 2 ·
Graduate Trouble understanding 2-side BH Penrose diagram
- Jimster41
- · Replies 23 ·
Graduate Frame dragging slowly rotating shell
- WannabeNewton
- · Replies 5 ·
Graduate Shapes of black holes (energy talk)
- 1832vin
- · Replies 15 ·
Speed in General Relativity (I found the picture)
- Quarlep
- · Replies 10 ·
Graduate Is Gravity Just a Byproduct of Time?
- czimborbryan
- · Replies 30 ·
Graduate Flat Donut Universes & Special Relativity
- Strilanc
- · Replies 2 ·
Graduate Understanding Tidal Forces on a Sphere: Do They Also Act Horizontally?
- exponent137
- · Replies 4 ·
Graduate "Speed limit of light" analogy
- DaveC426913
- · Replies 9 ·
Graduate A particle near an event horizon
- Jeff Rosenbury
- · Replies 7 ·
Graduate Derivation of Relativistic Doppler Shift: Step-by-Step Guide
- applied ahmed
- · Replies 3 ·
Graduate G Force derived from G potential
- aditya ver.2.0
- · Replies 5 ·
Graduate Computer simulation of ray of light passing near massive object
- Curious Progger
- · Replies 17 ·
Graduate Forming Spherically Symmetric Metric: Math Analysis & Omitted Steps
- ShayanJ
- · Replies 5 ·
Graduate Questions about Properties of the Godel Metric
- space-time
- · Replies 6 ·
Undergrad If the speed of light is constant in any inertial frame
- quincy harman
- · Replies 2 ·
Graduate Can Speed Exceed the Speed of Light in General Relativity?
- Quarlep
- · Replies 7 ·
Graduate How Does the Twins Paradox Apply to Clocks in a Closed Room?
- Stephanus
- · Replies 43 ·
Graduate Light Speed Paradox: Xavier's Torch on X
- Happiness
- · Replies 6 ·
Undergrad Relative movement and agreement about an object's speed
- Quarlep
- · Replies 38 ·
Graduate Length contraction, train along a line, and a detector
- Nick666
- · Replies 10 ·
Graduate Guy falling into black hole sees end of universe
- black hole 123
- · Replies 2 ·
Graduate Lorentz Factor Expansion: Analytic Continuation Value
- Bradosgood
- · Replies 8 ·
Graduate How do we eliminate the existance of luminiferous aether?
- Yunjia
- · Replies 5 ·
Graduate Two Objects at the Speed of Light
- imjustcurious
- · Replies 12 ·
Graduate "Triplet Paradox" involving a single one-way trip
- mathyou9
- · Replies 10 ·
Insights Adding Relativity to Gravity Animation | edguy99
- edguy99
- · Replies 3 ·
Graduate How Does Extreme Rotation Affect Space-Time Around Massive Objects?
- Justice Hunter
- · Replies 8 ·
Undergrad Is Time Dilation Making Astronauts Younger in Space?
- Threebrane
- · Replies 12 ·
Graduate Detecting matter falling into a Black Hole
- Logan5
- · Replies 85 ·
Graduate Why Does Gamma Apply to All Object Components?
- bolognie1
- · Replies 2 ·
Graduate Radiation Far Zone Expansion - 65 Characters
- decerto
- · Replies 4 ·
Graduate Lifespan of a black hole as measured by different observers
- T S Bailey
- · Replies 15 ·
Graduate Is General Relativity Incomplete? What Is It?
- Tanny 24/7
- · Replies 3 ·
Graduate Black hole electron: How can we drop the geodesic equation?
- greypilgrim
- · Replies 6 ·
Graduate Lorentz Transformation Equations, time transformation
- Grimble
- · Replies 46 ·
Graduate Palatini Formalism Derivations & Ideas: Holst Action
- Breo
- · Replies 5 ·
Undergrad How Long Does a Photon Think It Takes to Travel from the Sun to Earth?
- Canada Bob
- · Replies 23 ·
Graduate Why Gravitational Waves are Decomposed in Spin Weighted Spherical Harmonics
- Skhaaan
- · Replies 2 ·
Graduate Rovelli Quantum Gravity: Clarification on Symplectic Forms & Hamiltonian
- albedo
- · Replies 2 ·
Graduate Gravity Waves from Earth: Detecting from Orbit
- Atlas3
- · Replies 3 ·
Graduate What is wrong in D.Y. Gezari's paper about speed of light?
- elektrojean
- · Replies 5 ·
Graduate Cosmological Redshift: Calculating Wavelengths
- fisicist
- · Replies 12 ·
Graduate Relative Velocity in Lorentz Transform: Agree or Disagree?
- exmarine
- · Replies 4 ·
Graduate General Relativity and Quantum Cosmology
- Rajkovic
- · Replies 1 ·
Graduate Where do CTC's come from/ How do I interpret these tensors?
- space-time
- · Replies 6 ·
Graduate Gravity & Force From Black Holes: How Do Photons Escape?
- black hole 123
- · Replies 5 ·
Graduate Relativity Expert on Startalk Podcast: Interstellar & Near Light Travel
- SBNY444
- · Replies 7 ·
Undergrad Gravity in General Relativity and Earth's Surface
- Jerry Friedman
- · Replies 3 ·
Graduate Sun's Shrinkage due to Gravity: Visualize the Impact
- B0b-A
- · Replies 10 ·
Graduate Geodesic Deviation in 2D: Is There Directional Dependence?
- AcidRainLiTE
- · Replies 1 ·
Graduate Does light receive a spacetime curvature upon refraction?
- Atlas3
- · Replies 4 ·
Graduate Speed of Light is a Property of Massless Particles or Space?
- Islam Hassan
- · Replies 39 ·
Graduate The Speed of Light: Is a Second is a Second is a Second?
- Grimble
- · Replies 2 ·
Graduate Have we derived the Gravitational constant via General Rel?
- Tweej
- · Replies 11 ·
Graduate Ans. Speed of Light: Clarifying Experiments & Processes
- ScienceGuy30
- · Replies 2 ·
Graduate Can we experimentally detect the weight of energy?
- The_Duck
- · Replies 14 ·
Graduate Directional independence of motion in Lorentz Transformation
- Kanesan
- · Replies 22 ·
Graduate Observing Objects Near Light Speed: Time Dilation or Reality?
- Noctisdark
- · Replies 25 ·
Graduate There is a didactic gap in the explanation of P.O.R
- roineust
- · Replies 8 ·
Graduate Understanding Rindler Coordinates for Engineers
- nigelscott
- · Replies 10 ·
Graduate Interpretation of the Michelson-Morley experiment
- Daniil
- · Replies 8 ·
Graduate E=mc^2, Gravitational Potential & Energy Balance
- CaptainSlog
- · Replies 2 ·
Graduate How are space-like intervals important?
- Cluemore
- · Replies 8 ·
Graduate Weight Loss Physics Before SR: How Was It Understood?
- pantheid
- · Replies 1 ·
Graduate Question about tensor notation convention as used in SR/GR
- Coffee_
- · Replies 12 ·