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 Can Relativistic Propulsion Take Us Beyond Our Solar System?
- jlefevre76
- · Replies 6 ·
Graduate Twin Paradox - Question on Space Time Diagram Analysis Resolution
- controlfreak
- · Replies 51 ·
Graduate Find G_{\mu\nu} from Supergravity Lagrangian: Chapter 4, Section 4.3.2
- beyondthemaths
- · Replies 1 ·
Graduate What is the value of curvature which caused by earth
- tallal hashmi
- · Replies 21 ·
Graduate Finding a physical explanation for Lorentz factor symmetry
- Kanesan
- · Replies 1 ·
High School Does a black hole increase the speed of light?
- Prashan Shan
- · Replies 4 ·
Graduate Mass velocity at a black hole event horizon.
- Shaw
- · Replies 22 ·
Graduate What are the non-zero Christoffel symbols for 2D polar coordinates?
- flaticus
- · Replies 10 ·
Graduate What are these Gaussian coordinates?
- ash64449
- · Replies 11 ·
Graduate Understanding Light Beam Emissions and SR's Light Clock
- Micheth
- · Replies 10 ·
Graduate Clock synchronization and relativity of simultaneity
- Fantasist
- · Replies 47 ·
Graduate What happens if I grab someone's hand moving at nearly the speed of light?
- JBou
- · Replies 15 ·
Graduate Time Misured by Clock in Non Inertial Sistem?
- Andre' Quanta
- · Replies 12 ·
Undergrad What is the minimum speed in the universe?
- Nick666
- · Replies 61 ·
Graduate Are photon energies constant for any observers?
- jcap
- · Replies 3 ·
Graduate What would people on Miller's planet look like through a telescope from Earth time?
- 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 Taking derivatives of tensor expressions with Levi-Civita symbols
- beyondthemaths
- · Replies 24 ·
Graduate Does Hoyle C field violate conservation of energy-momentum?
- bcrowell
- · Replies 33 ·
Undergrad Relativistic effects in MIT's A Slower Speed of Light game
- ShayanJ
- · Replies 6 ·
Graduate Is Hawking Radiation a Kinematic Effect or a Real Phenomenon?
- ChrisVer
- · Replies 21 ·
Graduate Converting Gödel metric Einstein tensor to orthonormal basis
- 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 Why is the kinetic term ∂μφ used in the Euclidean action?
- 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 Does a flat toroidal universe have a preferred inertial frame?
- 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 Steps between equations 1.13 and 1.14 in relativistic Doppler shift
- 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 Deriving spherically symmetric metric from Killing equations
- 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 How can singularities automatically follow geodesics from the field equations alone?
- greypilgrim
- · Replies 6 ·
Graduate Lorentz Transformation Equations, time transformation
- Grimble
- · Replies 46 ·
Graduate Where can I find derivations of the 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 Why is θ₀=pᵢdqⁱ natural in Rovelli's symplectic formulation?
- 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 Why use c not c/a for wavelength in cosmological redshift
- 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 How do mediating photons escape a black hole's gravity?
- black hole 123
- · Replies 5 ·
Graduate Why don't relativity experts mention time dilation for near-light travel?
- SBNY444
- · Replies 7 ·
Undergrad Gravity in General Relativity and Earth's Surface
- Jerry Friedman
- · Replies 3 ·
Graduate How much smaller does the sun appear due to its gravitational lensing?
- 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 Light clock paradox and light speed in media
- ScienceGuy30
- · Replies 2 ·