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 Einstein-Cartan Field Equations Derivation
- Physicist97
- · Replies 2 ·
Undergrad What is the 4th Dimension - 3D World + Time or 4 Axis?
- nirky
- · Replies 5 ·
Undergrad Basis Vector in GR: Cartesian Plane Comparisons
- Tony Stark
- · Replies 2 ·
Graduate Penrose Diagrams: How to Create with Known Spacetime Metric
- naima
- · Replies 18 ·
Graduate Is time a vector? if it is, what is its direction?
- Superleopard21
- · Replies 15 ·
Graduate Is Λa_b the Same as Λba in Tensor Notation?
- dyn
- · Replies 4 ·
Graduate Are Newton's Laws Still Valid Near Black Hole Orbits?
- DParlevliet
- · Replies 58 ·
Graduate Implications of the tensorial form of the EFE
- TrickyDicky
- · Replies 26 ·
Undergrad Scalar Product of Orthonormal Basis: Equal to 1?
- Tony Stark
- · Replies 6 ·
Graduate Reconciling Constant Speed of Light & Relativity
- Sturk200
- · Replies 13 ·
High School How many times did the machine actually travel around the Earth?
- Nick666
- · Replies 23 ·
Graduate Space-Time Relativity: Finite Time & Measuring Time
- Topleft
- · Replies 5 ·
Graduate What is the definition of Locality (in QFT)
- "Don't panic!"
- · Replies 16 ·
Graduate Time Dilation with a Tennis Ball
- Sturk200
- · Replies 14 ·
Graduate How Does Time Dilation Affect the Forces Between Fast-Moving Objects?
- godzenon
- · Replies 4 ·
Graduate Generalized velocity addition and aberration formulas
- PAllen
- · Replies 4 ·
Graduate Simultaneous events, space-like separation & QFT
- "Don't panic!"
- · Replies 19 ·
Graduate Equations of motion for an observer falling radially into a blackhole
- Buzz Bloom
- · Replies 8 ·
Graduate Orthonormal Basis: Definition & Scalar Product in GR
- Tony Stark
- · Replies 2 ·
Graduate Doppler Effect & Time Dilation: Explained
- Amr Elsayed
- · Replies 15 ·
Graduate On the one way speed of light....
- rede96
- · Replies 55 ·
Graduate Energy conservation and wormholes
- PWiz
- · Replies 25 ·
Graduate 2 simple special relativity thought experiments
- JustinM523
- · Replies 16 ·
Undergrad What if the Halo Ring from "Halo" turned into a blackhole?
- Justice Hunter
- · Replies 7 ·
Graduate Energy Tensor & Field Equation | Einstein Theory
- shubham agn
- · Replies 2 ·
Graduate Quantized Kinetic Energy of Relativistic Objects
- jrvinayak
- · Replies 3 ·
Graduate Difference between Co-variant and Contra-variant vectors?
- sderamus
- · Replies 5 ·
Graduate Frame of Reference Dependant Mass & the Resulting Conflicts
- a1call
- · Replies 1 ·
Graduate Basic doubt of special relativity
- Raman Choudhary
- · Replies 13 ·
Undergrad Time Dilation & Mass: Does 2x Mass Mean 2x Slower Time?
- k!rl
- · Replies 1 ·
Graduate An observation about relativistic space travel....
- litup
- · Replies 12 ·
Graduate Material Behavior at the Event Horizon
- MattRob
- · Replies 10 ·
Graduate The sign of the cosmological term
- sweet springs
- · Replies 8 ·
Graduate Nature of Geodesic: Determine Without Knowing Metric?
- shubham agn
- · Replies 15 ·
Graduate Fall into Space-Time's Minimum Point
- Noctisdark
- · Replies 5 ·
Undergrad Can the Rest Mass of an Object Change Over Time?
- ChrisVer
- · Replies 13 ·
Graduate Understanding the Relativity of Simultaneity in Special Relativity
- Noctisdark
- · Replies 13 ·
Undergrad Is Freefall Really Not Accelerated Motion? Debunking Common Misconceptions
- inertiaforce
- · Replies 66 ·
Graduate Gravitational Velocity of Mass ##M## at Distance ##d## from Gravitating Body
- ChrisVer
- · Replies 16 ·
Graduate Clarifying Robertson-Walker Metric Math Objects
- space-time
- · Replies 1 ·
Graduate A question on length contraction
- rede96
- · Replies 9 ·
Graduate Electrodynamics in Robertson Walker spacetime
- vanhees71
- · Replies 18 ·
Graduate Writing Non-Coordinate Basis Continuity Eqs: $\nabla_a T^{ab}$
- pervect
- · Replies 3 ·
Graduate Measuring Speed of Light with One Clock
- lowemack
- · Replies 4 ·
Graduate Lower gravity and higher time dilation?
- SpiderET
- · Replies 17 ·
Graduate Relationship between gravitational time dilation and energy?
- jcap
- · Replies 7 ·
Graduate Alcubierre drive, could it cause inconsistencies?
- Gerinski
- · Replies 8 ·
Graduate Understanding Einstein's field equations
- ChromeBit
- · Replies 5 ·
Graduate Line element in Euclidean Space
- Tony Stark
- · Replies 8 ·
Graduate Do different frames of reference experience time dilation at the same rate?
- kweagle
- · Replies 49 ·
Graduate Unraveling the Mystery of Spin Connection in an Expanding Universe
- JorisL
- · Replies 2 ·
Graduate Calculating area and volume for Diagonal Metrics
- Tony Stark
- · Replies 9 ·
Graduate Wave Speed & Frequency: Can Bob Tell?
- DiracPool
- · Replies 1 ·
Graduate Understanding Lorentz Factor: Proving and Explaining Its Invariance
- CassiopeiaA
- · Replies 4 ·
Graduate Dimension of the stress energy tensor
- PerpStudent
- · Replies 10 ·
Graduate What is the value addition of GR?
- controlfreak
- · Replies 37 ·
Graduate Photon Experiencing Infinity Over Time: A Relativity Question
- The Un-Observer
- · Replies 6 ·
Undergrad Bending Space: Unraveling the Mystery
- thinkandmull
- · Replies 4 ·
Graduate Telescope Images: Light Deflection & Alien Observation
- kos
- · Replies 1 ·
Graduate How Does Light Behave Inside a Black Hole?
- Giuliano97
- · Replies 7 ·
High School Is time an illusion? Is it real to everyone? Please help
- Teendreams
- · Replies 1 ·
Graduate Vary Metric w/ Respect to Veirbein: How To?
- Physicist97
- · Replies 5 ·
Graduate General metric and flat metric
- Tony Stark
- · Replies 5 ·
Graduate Black hole traveling near the speed of light
- serp777
- · Replies 31 ·
Graduate When current flows through 2 parallel wires (same amount of current)
- jeevesh
- · Replies 6 ·
Graduate Varying Minkowski Metric: Is {\delta}{\eta}_{\mu\nu}=0?
- Physicist97
- · Replies 2 ·
Graduate Length Contraction & Relativistic Aberration: Is 1 Formula Enough?
- Kevin Willis
- · Replies 2 ·
Graduate How Can We Overcome the Challenges of Locating Gravitational Energy?
- sweet springs
- · Replies 66 ·
Graduate Time dilation, length contraction, but velocity invariant
- Kairos
- · Replies 35 ·
Graduate Geometry as the Classical Limit: Examples and Analogies in Physics
- ephen wilb
- · Replies 3 ·
Graduate Flat Spacetime at Event Horizon of Black Hole?
- btouellette
- · Replies 3 ·
Graduate What are some recommended resources for studying General Relativity?
- Salah93
- · Replies 1 ·
Undergrad Speed of Sound: Constant Irrespective of Source Speed
- PavanKumar
- · Replies 5 ·
Graduate Is This a Valid Simplification of Einstein's Equations?
- Physicist97
- · Replies 5 ·
Graduate Gravity & Spacetime Curvature: Have I Understood?
- slibbfalusken
- · Replies 3 ·
Graduate Perceiving Time and Speed at Near Light Speed
- TimeRip496
- · Replies 12 ·
Graduate Can we determine motion within an enclosed object using energy and mass?
- ande4jo
- · Replies 54 ·
Undergrad Can Galaxies Rotate Faster Than the Speed of Light?
- AYPHY
- · Replies 2 ·
Graduate Could this experiment prove special relativity to be wrong?
- Steven2007
- · Replies 9 ·
Graduate How gravity works beyond the Event Horizon
- Gaz1982
- · Replies 56 ·
Graduate Hamiltonian Weak Gravitational Field - Learn Free Particle Theory
- Andre' Quanta
- · Replies 5 ·
Graduate Basic Tensor Questions: Decomposition, Multi-Coordinate Systems
- clinden
- · Replies 10 ·
High School Relative Motion: Visceral Reminder of Its Meaning
- phinds
- · Replies 10 ·
Graduate Non causally linked events in special relativity
- Anaxagoras
- · Replies 21 ·
Graduate Diffeomorphism and removal of all matter from the spacetime
- exponent137
- · Replies 10 ·
Graduate Spacetime Curvature Difference: Gravity vs Speed
- Gerinski
- · Replies 2 ·
Graduate What Causes the Twins Paradox and Length Contraction in Relativity?
- Stephanus
- · Replies 79 ·
Graduate Why Is SO+(1,3) Decomposable and Connected?
- N1k1tA
- · Replies 3 ·
Graduate How Does Relativity Affect the Appearance of Large Objects?
- Brett Caton
- · Replies 1 ·
Graduate Time Rate at Earth's Center: Effects on Reactions?
- Gerinski
- · Replies 8 ·
Graduate Can a Non-Symmetric Metric Tensor Raise and Lower Indices in General Relativity?
- Physicist97
- · Replies 2 ·
Graduate Distant stars and length contraction
- Ookke
- · Replies 13 ·
Graduate Calculating Differential Precession of Gyroscopes Due to Gravitational Waves
- WannabeNewton
- · Replies 1 ·
Graduate Master Thesis Topic: GR & Statistical Mechanics
- iorfus
- · Replies 5 ·
Graduate Is Proper Time=0 Equivalent to Saying Proper Time Doesn't Apply?
- Nick666
- · Replies 35 ·
Graduate The Future of Gravitational Lensing: What Physicists Expect in 15 Years
- Am.obrien
- · Replies 6 ·
Graduate Translate acceleration to GR gravity
- ChrisVer
- · Replies 15 ·
Graduate Trace of Eq.(A.4) - Can Anyone Help?
- nenyan
- · Replies 3 ·
Graduate Time dilation and length contraction
- VertexOperator
- · Replies 7 ·
Graduate Derivative of the mixed metric tensor
- Brage
- · Replies 5 ·