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 Does Light Have Mass or Not?
- adimantium
- · Replies 6 ·
Graduate Questions regarding Lorentz force
- eightsquare
- · Replies 10 ·
Undergrad Einstein's SR a description of observations or a description of realit
- keepit
- · Replies 13 ·
Graduate Simple Derivation (1D) Lorentz Transformation
- phatgandy
- · Replies 5 ·
Graduate Is this rotating accelerating disk congruence Born rigid?
- pervect
- · Replies 82 ·
Graduate Did MMX's Assumptions on Light and Sound Waves Affect Their Findings?
- Gadhav
- · Replies 27 ·
Graduate Hamiltonian Formulation of GR for Elliptic Spacetime?
- korialstasz
- · Replies 9 ·
Graduate Twin paradox with three triplets in opposite directions
- greswd
- · Replies 143 ·
Graduate Is the Electromagnetic Field Everywhere?
- phellen
- · Replies 10 ·
Graduate Is the unsynchronised clock actually at the place where seen to be
- rajark
- · Replies 11 ·
Graduate Why wouldn't black hole singularity evaporate before it can form?
- lukesfn
- · Replies 99 ·
Graduate Hyperbolic path in Minkowski space
- luitzen
- · Replies 7 ·
Graduate Can a twin paradox occur if one twin never changes direction or stops?
- phellen
- · Replies 11 ·
Graduate How to plot correctly spacetime diagrams
- RiccardoVen
- · Replies 39 ·
Graduate Why is the speed of light considered a constant in physics?
- Avichal
- · Replies 10 ·
Undergrad Same Speed for Ball Thrown from Moving Car?
- Hepic
- · Replies 1 ·
Graduate A few very basics questions regarding 4 and 3 momenta and the trace of
- fluidistic
- · Replies 6 ·
Graduate Light is slower if object moves fast
- Avichal
- · Replies 10 ·
Graduate Trying to reconcile Lorentz Transformation and Length Contraction
- rajark
- · Replies 8 ·
Graduate Tensor equation in Dirac's 1975 book
- exmarine
- · Replies 4 ·
Graduate Deriving the Lorentz transformation from the invariant interval
- shounakbhatta
- · Replies 1 ·
Graduate Conservation of relativistic angular momentum
- yuiop
- · Replies 17 ·
Graduate Why GRT is the proper correction of gravitomagnetism?
- jarekd
- · Replies 10 ·
Undergrad E = mc^2, so how can anything have zero mass?
- goldust
- · Replies 8 ·
Graduate Space expansion, gravity waves, warp
- Edi
- · Replies 4 ·
Graduate 8*pi in the Einstein field equations?
- pellman
- · Replies 1 ·
Graduate Derivative of det(g): Confirmation Needed
- pellman
- · Replies 1 ·
Undergrad Why does Einstein's velocity addition give less than 30 km/h?
- Hepic
- · Replies 22 ·
Graduate What Happens to the Twins' Ages in the Twin Paradox?
- Cruncher
- · Replies 4 ·
Graduate Shift in Mercury's Perihelion by finite light speed
- TeddySciGuy
- · Replies 1 ·
Graduate Visualizing Mass Acceleration to Speed of Light: Is E=mc^2?
- bizzder
- · Replies 6 ·
Graduate Where did the energy go as the CMB redshifted from gamma rays to microwaves
- tionis
- · Replies 18 ·
Graduate Contra-Variant Vector Transform: Taking Partials
- exmarine
- · Replies 1 ·
Undergrad Can you find a ship's speed given only its travel time and light's travel time?
- tolove
- · Replies 8 ·
Graduate Light propagation in a moving spaceship frame
- Fiziqs
- · Replies 13 ·
Graduate Does Mass or Size Affect Curvation in Relativity?
- Hepic
- · Replies 1 ·
Graduate Challenges in Merging GR and QM from a Lagrangian Perspective
- bolbteppa
- · Replies 7 ·
Graduate Construct electromagnetic stress-energy tensor for a non-flat metric
- coleman123
- · Replies 12 ·
High School Going the speed of light, possibly.
- DrWafflez Jr.
- · Replies 3 ·
Graduate Can photons decay into neutrinos and lose their massless status?
- ilikescience94
- · Replies 13 ·
High School Time moves forward, what if you move UP or DOWN? Does time stop?
- lindsayb026
- · Replies 11 ·
Graduate Unable to see how light's one-way speed can be c experimentally
- BluMuun
- · Replies 49 ·
Graduate How can a person exist in two places simultaneously in relativity?
- bgq
- · Replies 8 ·
Graduate Relativity of Simultaneity Issue
- bgq
- · Replies 20 ·
Graduate Gravity: Warping of Space or Force?
- messysmurf
- · Replies 2 ·
Graduate Why doesn't pressure contribute to total mass in this perfect fluid solution?
- Mentz114
- · Replies 2 ·
Graduate Flat Spacetime at Event Horizon?
- jbunch
- · Replies 14 ·
Graduate Thin rotating disc under constant acceleration.
- yuiop
- · Replies 80 ·
Graduate Killing fields as eigenvectors of Ricci tensor
- WannabeNewton
- · Replies 4 ·
Graduate Does the Vacuum Solution in General Relativity Hold in the Presence of Matter?
- Thinkor
- · Replies 3 ·
Graduate Galilean principle of relativity
- roineust
- · Replies 44 ·
Graduate Clocks in stationary vs accelerating elevators at 1g for ten years
- ryan albery
- · Replies 14 ·
Graduate About c being constant and interaction at c.
- A Dhingra
- · Replies 9 ·
Graduate How does a traveling observer measure distance correctly in relativity?
- moonman239_2
- · Replies 3 ·
Graduate How is the deficit angle due to a relativistic cosmic string derived?
- Dilatino
- · Replies 1 ·
Graduate Question on General Relativity from a layperson
- Scott P
- · Replies 15 ·
Graduate Is ruler or radar measurement more accurate in defining length in relativity?
- yuiop
- · Replies 8 ·
Graduate Coordinate charts and open sets
- Ibix
- · Replies 2 ·
Graduate How do different observers measure time intervals in time dilation?
- suryanarayan
- · Replies 9 ·
Graduate Geometrical meaning of Weyl tensor
- Benjam:n
- · Replies 7 ·
Graduate Lorentz transformation for time - why the 'x' term?
- chipotleaway
- · Replies 2 ·
Graduate If time didn't exist could anything move or even happen?
- crabapplesause
- · Replies 11 ·
Graduate Why Is Gravity Infinite at a Black Hole's Center but Zero at Earth's Center?
- Sasikanth9
- · Replies 1 ·
Graduate What is the Effect of Motion on the Velocity Vector of Light?
- bgq
- · Replies 4 ·
Graduate Momentum of light sans Maxwell
- Will Koeppen
- · Replies 3 ·
Graduate Is Relativistic Electromagnetism Affecting a Test Charge Above a Moving Wire?
- Jimmy87
- · Replies 2 ·
Graduate Back with more relativity questions
- lostglutton
- · Replies 4 ·
Graduate How Would Physics Change Without Covariant and Contravariant Tensors?
- extrads
- · Replies 3 ·
Undergrad What is the significance of this equation on my t-shirt?
- frontman212
- · Replies 2 ·
Graduate Why does length contraction appear asymmetrical between Bob and Alice?
- chipotleaway
- · Replies 4 ·
Graduate Does Length Contraction Occur If Measuring Tools Contract Equally?
- bgq
- · Replies 4 ·
Undergrad Explanation of expanding universe
- SBMDStudent
- · Replies 2 ·
Graduate Twin paradox and relative clock speeds at near-light velocity
- Hepic
- · Replies 1 ·
Graduate Stress–energy tensorT^uv in theory and in practice
- extrads
- · Replies 24 ·
Undergrad Equivalence Principle: Einstein's Dilemma
- JamesClarke
- · Replies 1 ·
Graduate Curious about gravitational sluing detail
- bowlegged
- · Replies 34 ·
Graduate What is the Definition of Continuity in Minkowski Space?
- cosmic dust
- · Replies 5 ·
High School Does gravity have infinite range if its force approaches zero?
- Abidal Sala
- · Replies 3 ·
Undergrad Can an observer experience both time dilation and length contraction?
- suryanarayan
- · Replies 2 ·
Graduate Magnetic Fields of a Relativistic Charged Particle
- Albertgauss
- · Replies 6 ·
Undergrad Running at Different Speeds: Who Experiences Time Differently?
- Hepic
- · Replies 5 ·
Graduate Trace in Zee's metric determinant formula derivation
- dm4b
- · Replies 1 ·
Graduate Should photons be considered massless?
- Jonnyb302
- · Replies 38 ·
Graduate Lorentz Transformation: Derivation & Explanation
- JamesClarke
- · Replies 1 ·
Graduate How to resolve the contradiction in twin clocks?
- xinhangshen
- · Replies 119 ·
Graduate Electric Field Strength Conservation in Direction of Motion
- StateOfTheEqn
- · Replies 1 ·
Graduate Time dilation for particles in different trajectories through a gravitational field
- Flor
- · Replies 3 ·
Graduate What is Gravitational Field Strength in General Relativity?
- muppet
- · Replies 22 ·
Undergrad What happens to a human accelerated to near light speed?
- Hepic
- · Replies 16 ·
Graduate Milne universe in 2D and its relation to Rindler spacetime
- alialice
- · Replies 14 ·
Graduate Is the wiki explanation of time dilation correct?
- lyncsta
- · Replies 1 ·
Graduate Why Does Relativistic Kinetic Energy Differ at Low Velocities?
- JamesClarke
- · Replies 3 ·
Graduate Timelike v. spacelike, is it arbitrary?
- BruceW
- · Replies 177 ·
Graduate Understanding Relativity Through Spacetime Diagrams
- Involute
- · Replies 4 ·
Graduate Tall rotating cylinder near a black hole
- yuiop
- · Replies 34 ·
Graduate Approaching C in any direction?
- MinnesotaState
- · Replies 1 ·
Graduate Gravitation: Experiments Proving Its Scope
- ShayanJ
- · Replies 5 ·
Graduate Understanding Light's Constant Speed in Special Relativity
- phellen
- · Replies 18 ·
Graduate Einstein & Simultaneity: Two Questions
- jeffkosmo
- · Replies 17 ·
Graduate How does distance affect simultaneity when accelerating?
- analyst5
- · Replies 17 ·