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 How accurate is the metaphor of trampoline
- victorvmotti
- · Replies 20 ·
Graduate Centrifugal and Coriolis forces covariant formulation
- WannabeNewton
- · Replies 41 ·
Graduate Two Frames of 0-Momentum in the Minkowski Plane?
- haruna
- · Replies 4 ·
Graduate Understanding Rest Mass of an Electron in a Crystal
- kur82
- · Replies 2 ·
Undergrad Are primed and unprimed variables in Lorentz transforms frame-dependent?
- emmac
- · Replies 6 ·
Graduate Massless Particles and the Universal Speed Limit
- Dunbar
- · Replies 12 ·
Graduate What is the Riemann Metric Tensor and its components?
- shounakbhatta
- · Replies 3 ·
Graduate Space-time curvature without mass-energy ?
- kderakhshani
- · Replies 10 ·
Graduate Killing vecotrs of Schwarzschild metric
- Vrbic
- · Replies 4 ·
Graduate Does Spaghettification contradict space/time swap in a black hole
- liron
- · Replies 7 ·
Graduate Derivatives in a non-trivial metric
- cj7529
- · Replies 7 ·
Graduate Radial Null Geodesic: Solving the Equation
- Ichimaru
- · Replies 1 ·
Graduate The present epoch in FRW metric
- victorvmotti
- · Replies 4 ·
Undergrad Why is one twin older in the twin paradox if motion is relative?
- Moris526
- · Replies 63 ·
Graduate The threshold of general relativity gravity
- victorvmotti
- · Replies 9 ·
Undergrad Moving fairground light, thought experiment
- delsaber8
- · Replies 15 ·
Graduate How does General Relativity contradict quantum mechanics?
- lizzie96
- · Replies 2 ·
Graduate Why does a stationary clock appear to run fastest in its frame?
- NATURE.M
- · Replies 6 ·
Graduate What does v represent in special relativity transformation equations?
- ftr
- · Replies 21 ·
Graduate What is the relation between Schwarzschild r and actual distance from the center?
- Vrbic
- · Replies 5 ·
Graduate Time Dependent Exact Solutions of Einstein's Equations
- Vrbic
- · Replies 6 ·
Graduate How to determine real inertia without 4 vectors?
- Dadface
- · Replies 37 ·
Graduate Magnetic Fields & Space-Time: Can They Bend?
- schonovic
- · Replies 1 ·
Graduate Radar distance on DrGreg's Rindler chart?
- Jorrie
- · Replies 16 ·
Graduate Covariant tensor transformation and Minkowski metric invariance
- decerto
- · Replies 5 ·
Graduate Why do Lorentz transformations need gamma for waves but not for Doppler shift?
- ANvH
- · Replies 5 ·
Graduate Time dilation, length contraction and relative simultaneity on Earth
- analyst5
- · Replies 8 ·
Graduate Calculating Distances in Special Relativity - Bob's Question
- bobbles22
- · Replies 3 ·
Graduate Velocity in Proper Time: Relativistic Acceleration Equation
- nomadreid
- · Replies 2 ·
Graduate Does time slow down for the flame in the barking dog experiment?
- Patriciamsv
- · Replies 1 ·
Graduate What is the significance of the velocity term in the Alcubierre metric?
- redstone
- · Replies 2 ·
Graduate Objects Falling in General Relativity
- d-richard
- · Replies 3 ·
Undergrad Does time dilation appear the same from both reference frames?
- travis51
- · Replies 10 ·
Graduate How do inertial frames centered on a black hole's horizon work?
- PeterDonis
- · Replies 91 ·
Graduate How is the elastic modulus of spacetime calculated from the Einstein equation?
- Sonderval
- · Replies 7 ·
Graduate Can Gravity Exist in an Inertial Frame?
- analyst5
- · Replies 3 ·
Graduate Could there be an absolute 'state of reference?'
- mrnike992
- · Replies 135 ·
Graduate Does the expanding Universe have a knowable center?
- gymjim
- · Replies 5 ·
Graduate Metricity Equation: ∇_{μ}g_{αβ}=0, ∇_{μ}g^αβ ≠ 0?
- kuecken
- · Replies 4 ·
Graduate Would we feel the effects of a strong gravitational wave?
- DPRK
- · Replies 12 ·
Graduate Why must physics equations use tensors to be covariant in GR?
- ta66505477
- · Replies 12 ·
Graduate Why would I think I'm not moving?
- Layman
- · Replies 47 ·
Graduate Density terms in the stress-energy momentum tensor
- space-time
- · Replies 4 ·
Graduate Intuitive understanding of Thomas precession
- yuiop
- · Replies 70 ·
Graduate Commutator of covariant derivatives and the Ricci tensor
- space-time
- · Replies 7 ·
Graduate Gravitational Binding Energy in GR
- StateOfTheEqn
- · Replies 4 ·
Graduate Twin paradox: comparing proper times in S and S1 frames
- vidwansoni
- · Replies 11 ·
Graduate Why does the exterior derivative df depend on a neighborhood?
- maverick280857
- · Replies 2 ·
Graduate How Does Mass Affect the Fabric of Space-Time?
- Paramedic_Nerd
- · Replies 3 ·
Graduate Differences between different simultaneity conventions
- analyst5
- · Replies 7 ·
Graduate Can Time Dilation Prevent Crushing at c?
- God Plays Dice
- · Replies 15 ·
Graduate Relativistic Compressor Paradox
- jartsa
- · Replies 3 ·
Graduate General parameterisation of the geodesic equation
- victorvmotti
- · Replies 26 ·
Graduate Absolute time, local time, planck time
- sloughter
- · Replies 5 ·
Graduate If stress vanishes in one frame, it vanishes in all frames, but
- bcrowell
- · Replies 7 ·
Graduate How Does Velocity Addition Impact Time Dilation in Rotating Objects?
- analyst5
- · Replies 3 ·
Graduate Understanding Inflation: Effects of Spontaneous Symmetry Breaking on Gravity
- stevendaryl
- · Replies 1 ·
Graduate Global Coord Atlas Universe: GR Coord Charts, Speed Light
- berra
- · Replies 3 ·
Graduate Is Schwarzschild spacetime parallelizable?
- TrickyDicky
- · Replies 6 ·
Graduate Where Does Entropy Go in Inertial Frame During Relativistic Refrigeration?
- jartsa
- · Replies 24 ·
Graduate What Are Rosen Coordinates in Gravitational Wave Analysis?
- CoordinatesPLZ
- · Replies 5 ·
Graduate Change of frames in relativity
- johnny_bohnny
- · Replies 41 ·
Graduate Why does gravity not get divided among many masses like other forces do?
- pprajwal
- · Replies 9 ·
Graduate How Does the Loaf of Bread Model Explain Space-Time Perception?
- Starstuffer
- · Replies 10 ·
Graduate Can baseballs truly synchronize clocks ?
- Edd
- · Replies 1 ·
Graduate Dirac equation, curved space time
- pleasehelpmeno
- · Replies 8 ·
Graduate Franklin, Lorentz contraction, Bell's spaceships, and
- bcrowell
- · Replies 15 ·
Graduate Do O and S see different clock readings from the same radiation events?
- dface
- · Replies 8 ·
Graduate Levi-Civita connection and pseudoRiemannian metric
- TrickyDicky
- · Replies 94 ·
Graduate The Energy-momentum formula considering internal energy
- Sunfire
- · Replies 33 ·
Graduate Christofell Symbols: Derivation in Schutz & Wald
- HomogenousCow
- · Replies 1 ·
Undergrad How does GPS receiver calculate time delay?
- aadarsh9
- · Replies 10 ·
Graduate Light travelling towards a black hole
- jamesbolt
- · Replies 1 ·
Graduate Does Accelerating Mass Radiate Gravitational Waves and Lose Energy?
- adamp121
- · Replies 3 ·
Graduate Can overlapping black hole event horizons allow escape?
- adrian_m
- · Replies 1 ·
Undergrad Is the fabric of space time 2d or 3d
- 6thgrader
- · Replies 1 ·
Graduate Two beams of light traveling in opposite directions=2c
- abbott287
- · Replies 13 ·
Graduate Futurisitic Understanding of Space Time: Escaping a Black Hole?
- 6thgrader
- · Replies 3 ·
Graduate Two objects moving towards each other.
- travis51
- · Replies 4 ·
Graduate Does gravity turn time into space?
- Karl Coryat
- · Replies 1 ·
Graduate Energy and proper time (not relativity)
- dapias09
- · Replies 3 ·
Graduate Does gravity naturally prefer Einstein synchronisation on a rotating ring?
- yuiop
- · Replies 2 ·
Graduate Orthogonal space-like vectors.
- Felpudio
- · Replies 1 ·
Graduate How Does Velocity Affect Time, Length, and Mass in Special Relativity?
- cooper607
- · Replies 9 ·
Graduate Can we calculate kinetic energy by multiplying 1/2mv^2 by 1.15 at C/2 speed?
- bobie
- · Replies 20 ·
Graduate Rotating frames desynchronization
- johnny_bohnny
- · Replies 61 ·
Graduate Can Rotating Clocks on a Rim Be Synchronized Using Simultaneity Principles?
- JVNY
- · Replies 69 ·
Graduate Time dilation between equator and geostationary orbit in SR
- rede96
- · Replies 17 ·
Graduate Relativity and Black Hole Question
- Salamon
- · Replies 52 ·
Graduate EFE Metric: Find a Link to the Full Expansion
- HomogenousCow
- · Replies 6 ·
Graduate Why Does Light Experience a Large Shapiro Delay Near Black Holes?
- jartsa
- · Replies 15 ·
Graduate What happens to Bob falling through the event horizon?
- sciencegem
- · Replies 2 ·
Graduate Why does a light signal take longer to reach a moving ship in its own rest frame?
- nearc
- · Replies 15 ·
Graduate History of building of general relativity
- vanger
- · Replies 8 ·
Graduate Parity conservation and the Field-Strength Tensor
- PhilDSP
- · Replies 7 ·
Graduate Could the Observer's Absolute Rest Explain the Constancy of Light Speed?
- rajeshmarndi
- · Replies 15 ·
Graduate Is Virtual Length Contraction Influenced by Changes in Refractive Index?
- ANvH
- · Replies 6 ·
Graduate Real examples of the space-time interval
- geordief
- · Replies 10 ·
Graduate Conservation of 3-Momentum: Noether’s Theorem
- dipole
- · Replies 1 ·
Graduate Minkowski normal v. Euclidean normal
- flyinjoe
- · Replies 7 ·