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
Undergrad Time dilation and lorentz transformation
- nn542
- · Replies 11 ·
Graduate 4-force on a charged particle from the Faraday 2-form in GR
- quasar987
- · Replies 5 ·
Graduate Active and passive Lorentz transformation
- SpinorData
- · Replies 13 ·
Graduate Equation of Motion for a Point Mass Falling into an Infinitely Small Black Hole
- Binaryburst
- · Replies 16 ·
Graduate Why don't direction and path affect time dilation for the triplets?
- Seminole Boy
- · Replies 24 ·
Graduate Is time a physical dimension or just how we organize change?
- RealityQuest
- · Replies 7 ·
Graduate Relative acceleration of geodesics and spacetime curvature
- timmdeeg
- · Replies 21 ·
Undergrad What is the difference between separation in space and separation in time?
- enceladus_
- · Replies 15 ·
Graduate How do you calculate the stress-energy tensor in Einstein's field equations?
- zepp0814
- · Replies 2 ·
Graduate Photon Acceleration Near Gravitational Fields
- big_bounce
- · Replies 10 ·
Graduate Higgs Boson vs GR's Spacetime: Is Mass Effect Obsolete?
- zepp0814
- · Replies 3 ·
Graduate SR Vectors & Tensors: Transformations Explained
- quasar987
- · Replies 5 ·
Graduate EM Tensor Invariants - Are There More?
- BruceW
- · Replies 23 ·
Graduate Time in the reference frame of the photon and aswell curved spac
- Curious45
- · Replies 34 ·
Graduate Regular empirical evidence of curved space or massless photons?
- Curious45
- · Replies 19 ·
Graduate Possible mistake in an article (rotations and boosts).
- Fredrik
- · Replies 85 ·
Graduate How is C speed invariance - hows it suppose to work mechanically?
- Curious45
- · Replies 17 ·
Graduate How does the world look like after a Lorentz transformation?
- nick41
- · Replies 7 ·
Graduate Is the 4-velocity tangential to the worldline in Minkowski spacetime?
- Sunfire
- · Replies 19 ·
Graduate Gravitational time dilation from the metric
- bueller11
- · Replies 1 ·
Graduate Derivation of the Geodesic equation using the variational approach in Carroll
- silverwhale
- · Replies 7 ·
Graduate Diffeomorphic Invariance implies Poincare Invariance?
- FedEx
- · Replies 117 ·
Undergrad How Strong is the Gravity of a Black Hole Compared to Earth?
- uperkurk
- · Replies 1 ·
Graduate Acceleration to near light speed - where does the energy go?
- RagingPineapple
- · Replies 8 ·
Graduate Are there simplified theories explaining what gravity actually is?
- kiriri
- · Replies 9 ·
Graduate Metric constraints in choosing coordinates
- NanakiXIII
- · Replies 49 ·
Graduate Stars moving faster than the speed of light
- 42Physics
- · Replies 14 ·
Graduate Length contraction of space with multiple reference frames
- coktail
- · Replies 53 ·
Graduate How to reconcile photon not experiencing time with it's travel time?
- San K
- · Replies 6 ·
Graduate Metric tensor - index manipulation
- zn5252
- · Replies 2 ·
Graduate Momentum of Object in 0.6c Inertia Frame
- Outrageous
- · Replies 2 ·
Graduate Relativistic velocity and distance with constant 1g acceleration
- servo75
- · Replies 9 ·
Graduate Does a moving clock stop running when brought to rest at its destination?
- exmarine
- · Replies 7 ·
Graduate Do gravity and density have a direct relationship?
- mintparasol
- · Replies 22 ·
Graduate Freely Falling Inertial As Seen By Distant Inertial Observer
- 1977ub
- · Replies 4 ·
Graduate Does light experience time and how does the universe appear from light's perspective?
- jalsck
- · Replies 20 ·
Graduate Is the speed of light truly constant in all reference frames?
- ataraxic89
- · Replies 6 ·
Graduate Deriving Einstein tensor, Riemmann tensor step
- pleasehelpmeno
- · Replies 17 ·
Graduate Adding Velocities: Newbie Question on Special Relativity
- servo75
- · Replies 4 ·
Graduate What is most likely to be the actual explanation of gravity?
- VertexOperator
- · Replies 1 ·
Undergrad Do violent accelerations in a box mimic gravity uniformly for different masses?
- Buckleymanor
- · Replies 34 ·
Undergrad Are we moving at the speed of light?
- ebodet18
- · Replies 29 ·
Undergrad Question for Special Relativity
- 42Physics
- · Replies 2 ·
Graduate Gravitational time dilation in the center of a mass
- Xilor
- · Replies 5 ·
Graduate Contracting R_{αβ} to R^ρ_αβσ: No 16 Multiplier
- pleasehelpmeno
- · Replies 1 ·
Graduate Why there are no other kind of length contractions?
- smm
- · Replies 20 ·
Undergrad Point of reference in relative time
- EmilMasback
- · Replies 7 ·
Graduate Frame drag to accelerate spaceships?
- makc
- · Replies 6 ·
Undergrad Is the speed of light the same for all observers?
- Dewbo
- · Replies 14 ·
Graduate Does the Alcubierre drive accelerate or maintain constant velocity?
- codeman_nz
- · Replies 34 ·
Graduate Can Black Holes Truly Exist for Earth Observers?
- rjbeery
- · Replies 74 ·
Undergrad What time does space-time measure compared to a watch?
- robertito
- · Replies 10 ·
Undergrad C = √ (E/m) We can determine c
- ebodet18
- · Replies 3 ·
High School Is matter the same as mass in E=mc²?
- ebodet18
- · Replies 2 ·
Graduate What is the significance of the factor 8π in the Einstein Equations?
- NicosM
- · Replies 10 ·
Undergrad Do physics professors still misunderstand Einstein?
- terryl
- · Replies 30 ·
Graduate How can light reach another spaceship if it needs both horizontal velocity and speed c?
- richardparsons
- · Replies 2 ·
Graduate Speed of light measured in/by a parallel frame moving at c
- San K
- · Replies 2 ·
Graduate What is the maximum entropy a system can have based on its energy and size?
- michael879
- · Replies 39 ·
Graduate Question on hyperbolic rotation
- Sunfire
- · Replies 11 ·
Basic Lorentz Transform widget
- Dale
- · Replies 4 ·
Graduate What prevents mass-less gauge bosons and gravity going faster than c?
- Bararontok
- · Replies 7 ·
Graduate Would wormholes transmit gravity, if so how?
- Gulli
- · Replies 3 ·
Graduate Radial length contraction = mass anisotropy?
- Vincentius
- · Replies 27 ·
Graduate Are perfect fluid solutions physically real or coordinate-dependent?
- TrickyDicky
- · Replies 9 ·
Graduate Length contraction on charged wire
- port31
- · Replies 2 ·
Graduate Why is du/dτ the same for emitter and observer in Schwarzschild metric?
- MarkovMarakov
- · Replies 6 ·
Graduate The concept of inertial mass from Newton to Einstein
- James MC
- · Replies 14 ·
Graduate Is coupling G actually a constant of nature or it can vary?
- helpcometk
- · Replies 5 ·
Graduate Gravitational Pull Limit Across Distance?
- serp777
- · Replies 1 ·
Graduate What Causes Consistent Measurement of Light's Speed Despite Relative Motion?
- coktail
- · Replies 11 ·
Graduate Linearised gravity contraction
- pleasehelpmeno
- · Replies 20 ·
Undergrad Relativity: Observer's Perspective - Am I Getting it Right?
- Vincent Vespa
- · Replies 2 ·
Graduate Lorentz Contraction ?s and Implication
- Apophenia
- · Replies 46 ·
Graduate Contracting Tensors: Why G^αβ?
- pleasehelpmeno
- · Replies 6 ·
Graduate Is There an Error in the GR Problem? Join the Discussion!
- pleasehelpmeno
- · Replies 1 ·
Graduate How Liouville's theorem applies to gravitationally deflected light?
- Eduardo_GV
- · Replies 4 ·
Graduate Gravitational Time Dilation and Twin Paradox ?'s
- Apophenia
- · Replies 65 ·
Graduate Why do photons have momentum yet no mass?
- chestycougth
- · Replies 5 ·
Graduate The Pioneer effect and Spacecraft flyby anomaly
- SinghRP
- · Replies 13 ·
Graduate A few questions about light and relativistic effects
- coktail
- · Replies 22 ·
Graduate Antisymmetric and symmetric part of a general tensor
- center o bass
- · Replies 1 ·
Graduate New paradox in special relativity?
- djsourabh
- · Replies 8 ·
Graduate Special relativity from the frame of refrence of photon
- djsourabh
- · Replies 5 ·
Graduate Mathematics of MTW gravitation.
- center o bass
- · Replies 1 ·
Graduate A diff-invariant 1+1d QFT with divergent central charge?
- quelarion
- · Replies 2 ·
Graduate Spin precession of observer at rest in rotating shell
- WannabeNewton
- · Replies 13 ·
Undergrad Can you explain how time is not constant?
- yoyopizza
- · Replies 26 ·
Graduate General relativity on infinite dimensional Banach spaces
- MathematicalPhysicist
- · Replies 6 ·
Graduate SR Effects on Interstellar Probe: Can Messages Return in 50 Years?
- dbmorpher
- · Replies 3 ·
Graduate Power Series from MTW 19.1: Explained?
- zn5252
- · Replies 1 ·
Graduate How does the null energy condition relate to dark energy's equation of state?
- Madster
- · Replies 2 ·
Graduate Do GPS Clocks Really Run Slower Than Earth Clocks Due to Time Dilation?
- exmarine
- · Replies 4 ·
Graduate 19th-century constraints on properties of the aether
- bcrowell
- · Replies 3 ·
Graduate Gravitation in N+1 Dimensional Flat Space
- ophase
- · Replies 6 ·
Graduate I know that nothing can exceed the speed of light, but
- student34
- · Replies 42 ·
Graduate What is the origin of inertia in relativity?
- arindamsinha
- · Replies 11 ·
Undergrad Why is the theory of relativity a theory?
- VertexOperator
- · Replies 21 ·
Graduate A special point in special relativity
- n_ktt
- · Replies 31 ·
Graduate Experiment on mass of a photon
- Slait
- · Replies 33 ·