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 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 this 4-velocity tangential to the worldline
- 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 Simplified theories for gravity?
- 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 How Can We Calculate Relativistic Velocity for an Interstellar Journey?
- servo75
- · Replies 9 ·
Graduate SRT Clocks Again Einstein, 1905: Q&A
- 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 Understanding the Universe through the Perspective of Light
- 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 Acceleration in a Closed Box: Uniform or Varied?
- 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 Alcubierre Drive: Constant Velocity or Acceleration?
- codeman_nz
- · Replies 34 ·
Graduate Can Black Holes Truly Exist for Earth Observers?
- rjbeery
- · Replies 74 ·
Undergrad Understanding Time in Space-Time for Beginners
- robertito
- · Replies 10 ·
Undergrad C = √ (E/m) We can determine c
- ebodet18
- · Replies 3 ·
High School E=mc^2: What is Mass & Matter?
- 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 Time Dilation Explained: What About Light Speed?
- 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 Exploring the Role of Perfect Fluid Solutions in General Relativity
- TrickyDicky
- · Replies 9 ·
Graduate Length contraction on charged wire
- port31
- · Replies 2 ·
Graduate Defining Emitter vs Observer for 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 Simple question on Gravito - Magnetism inside Shell
- WannabeNewton
- · Replies 13 ·
Undergrad Can you explain how time is not constant?
- yoyopizza
- · Replies 26 ·
Graduate G's Guide to GR on 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 Understanding Null Energy Condition & Friedmann Equations
- 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 Unraveling the Mystery of Inertia: The Search for its Origin
- 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 ·
Graduate Gravity & Magnetism: How Mass Interacts with Space-Time?
- Apophenia
- · Replies 1 ·
Graduate No definite viewpoint for the accelerating traveler?
- Alain2.7183
- · Replies 35 ·
Graduate Why is the EH of a BH considered to be expanding at c?
- Tracer
- · Replies 25 ·
Graduate Solving a Momentum Question: Struggling with Simple Cons?
- stallm
- · Replies 2 ·
Graduate Is Dingle's Critique of the Lorentz Transform Valid?
- exmarine
- · Replies 9 ·
Graduate Does Relativistic Mass Affect Weight and Gravity?
- greswd
- · Replies 11 ·
Graduate How to manipulate the determinant of metric tensor?
- jtceleron
- · Replies 2 ·
Graduate Length contraction problem of right angled triangle
- djsourabh
- · Replies 6 ·
Graduate Implications of the statement Acceleration is not relative
- GregAshmore
- · Replies 335 ·
Graduate Does the relativity of simultaneity imply a sort of determinism?
- RLutz
- · Replies 17 ·
Graduate Lorentz Transforms: Question About Inverting LT Frames
- exmarine
- · Replies 4 ·