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
High School Travelling In A Straight Line In Space
- Sammyg
- · Replies 3 ·
Graduate What is the Orientation of Lightcones in a Kerr Ring?
- Dmitry67
- · Replies 2 ·
Graduate Time Dilation and/or Kinetic energy the same/different?
- Noja888
- · Replies 4 ·
Graduate Does time slow down at the subatomic level?
- JKirkland
- · Replies 3 ·
Graduate Radius of Universe, electrons, and strings.
- Spinnor
- · Replies 8 ·
Graduate A few questions about the Lorentz factor
- kotreny
- · Replies 12 ·
Graduate What is the speed of light in gravity?
- Zman
- · Replies 5 ·
Graduate How Does Relativity Influence Musical Octaves?
- Lear
- · Replies 6 ·
Graduate Does Special Relativity Affect Clock Synchronization on a Moving Spaceship?
- E92M3
- · Replies 3 ·
Undergrad Relativity and Inertia - An Exploration
- Urmi Roy
- · Replies 31 ·
Graduate Are Both Coordinate Systems in Special Relativity Considered Inertial?
- JM
- · Replies 82 ·
Graduate Does empty space correspond to Einstein's 4D spacetime?
- delplace
- · Replies 18 ·
Graduate The speed of gravitational field propagation
- blaksheep423
- · Replies 61 ·
Graduate Why does linearized gravity give g^ab = η^ab - h^ab from g_ab = η_ab + h_ab?
- kexue
- · Replies 3 ·
Graduate Say gravity were larger, matter burns faster?
- Spinnor
- · Replies 15 ·
Graduate Why is a scalar field incompatible with the equivalence principle?
- Bibipandi
- · Replies 11 ·
Graduate Value of c and strange things that don't happen when at c
- ZirkMan
- · Replies 34 ·
Graduate How many people understand General relativity by Enshtein?
- vissarion.eu
- · Replies 16 ·
Graduate How are watches syncronized
- Gerenuk
- · Replies 7 ·
Graduate Special Relativity Velocity Addition: Vector or Axis?
- E92M3
- · Replies 3 ·
Undergrad Can you hitchhike on a lightspeed object?
- ejlyles
- · Replies 6 ·
Graduate Understanding Length Contractions and Time Dilation
- gsingh2011
- · Replies 9 ·
Graduate Meaning of Lorentz Transformations purely mathematically ?
- TMSxPhyFor
- · Replies 3 ·
Graduate Relativistic Vectors: Opposite Direction Assumption
- anantchowdhary
- · Replies 4 ·
Graduate Caltech Gravitational Wave theory - videos included
- DanP
- · Replies 1 ·
Graduate Spinning tornado wheel - circumference and radius
- ManDay
- · Replies 26 ·
Graduate Temperature during black hole collapse
- nickyrtr
- · Replies 12 ·
Graduate Kruskal and Penrose diagrams for a Minkosky spacetime
- JeffOCA
- · Replies 1 ·
Graduate Simulating electron beam - what equations to use?
- Vdtta
- · Replies 16 ·
Graduate Do Photons Produce Gravitational Fields?
- blaksheep423
- · Replies 26 ·
Graduate Deriving relativistic momentum and energy from first principles
- DrGreg
- · Replies 2 ·
Graduate Why does my shorthand E=mc² derivation give the right answer?
- I_am_learning
- · Replies 6 ·
Graduate How the universe looks like at the speed of light
- yoelhalb
- · Replies 6 ·
Black Hole Animation: Find Trustworthy Links for Astronomy Presentation
- JeffOCA
- · Replies 1 ·
Graduate Invariant Tensors in GR and SR
- velapis
- · Replies 3 ·
Graduate What is time, and can it be changed?
- ieifood
- · Replies 19 ·
Graduate We can't determine who is moving?
- yoelhalb
- · Replies 8 ·
Undergrad Has anybody read this book on relativity?
- Goldbeetle
- · Replies 3 ·
Undergrad Does Hubble's law implies accelerated expansion?
- LedPhoton
- · Replies 4 ·
Undergrad Rest mass after inelastic collision of two relativistic objects
- curiousphoton
- · Replies 10 ·
Graduate Lorentz Transformation Vector Form Formula
- elibj123
- · Replies 2 ·
Undergrad Why does gravity follow the inverse square law?
- mars shaw
- · Replies 2 ·
Graduate Why Does Traveling at High Speeds Affect Aging Compared to Staying on Earth?
- blasphemite
- · Replies 2 ·
Graduate A deviation from General Relativity on cosmic scales
- Orion1
- · Replies 6 ·
Graduate Time Dilation Paradox (variant distance between two accelerating bodies)
- quertying
- · Replies 8 ·
Graduate Light in the box gravity - question.
- Dmitry67
- · Replies 11 ·
Graduate So gravity and accel can be transformed into eachother, but what about
- ManDay
- · Replies 13 ·
Graduate Misner-Thorne-Wheeler, p.92, Box 4.1, typo?
- gheremond
- · Replies 2 ·
Graduate What is the significance of causality in relativity?
- qraal
- · Replies 20 ·
Graduate Gravitational time dilation question
- ezezez
- · Replies 12 ·
Graduate In simplest terms, what is null dust?
- nomadreid
- · Replies 4 ·
Graduate Constancy of light speed implied in time and clocks
- myspacetime
- · Replies 4 ·
Graduate Can Einstein's Theory of Relativity Make Time Travel Possible?
- tj-time jumpe
- · Replies 4 ·
Graduate Active and passive gravitational mass
- TurtleMeister
- · Replies 2 ·
Graduate What's Wrong with Big Clock Moving at 0.1C?
- S.Vasojevic
- · Replies 2 ·
Graduate Why does time dilation favor the spaceship twin over Earth in the twin paradox?
- gsingh2011
- · Replies 3 ·
Graduate How does spacetime fabric work in three spatial dimensions?
- gsingh2011
- · Replies 3 ·
Graduate Proving conservation of energy-momentum from the stress-energy tensor
- Azrael84
- · Replies 11 ·
Graduate Does time stop and space collapse in a photon's reference frame?
- 6Stang7
- · Replies 45 ·
Graduate Calculating the Ricci Tensor in 5D Using GRTensor
- alejandrito29
- · Replies 1 ·
Graduate Really moving. What does Bridgman mean.
- matheinste
- · Replies 9 ·
Graduate Can someone explain this time dilation problem to me?
- s1cko
- · Replies 2 ·
Graduate Black Hole Time Machine (time dilation)
- sciroccokid
- · Replies 13 ·
Graduate Why doesn't a geosynchronous satellite fall toward Earth in the satellite's rest frame?
- Charlie G
- · Replies 7 ·
Graduate Twin paradox: why is the traveling twin younger if aging less means slower time?
- stalnaker
- · Replies 5 ·
Undergrad Has Gravity Probe B proved framed dragging
- sciroccokid
- · Replies 2 ·
Graduate Rotating disks and time dilation
- quitequick
- · Replies 7 ·
Graduate Heliocentrism from a relativistic standpoint
- deuced
- · Replies 38 ·
Graduate Does information from infalling objects remain frozen at the event horizon?
- capnkissling
- · Replies 7 ·
Graduate Is Distance/space Lorentz contracted?
- Austin0
- · Replies 84 ·
Graduate Solving the Stress-Energy Tensor Problem
- Azrael84
- · Replies 2 ·
Graduate Does coupling to stress-energy imply coupling to Ricci?
- A/4
- · Replies 1 ·
Graduate Is Kinetic Energy Different in Relativity?
- RobSoko315
- · Replies 21 ·
High School What was the 1919 experiment about? Explanation needed.
- pixel01
- · Replies 6 ·
Graduate Why do really fast speeds keep you from aging or feeling time ?
- beniliusbob
- · Replies 9 ·
Graduate Projection Operator: Showing Orthogonality for Non-Null q
- Azrael84
- · Replies 1 ·
Graduate Proof set of one-forms is a vector space
- Azrael84
- · Replies 6 ·
Graduate Has Gravity Probe B Confirmed Frame Dragging?
- selfAdjoint
- · Replies 8 ·
Graduate Electromagnetic blackhole violates 2nd law of thermodynamics?
- JustinLevy
- · Replies 1 ·
Graduate Gravity - a consequence or active force?
- tonyb1969
- · Replies 16 ·
Graduate Effective potential and geodesics in G.R.
- dianaj
- · Replies 2 ·
Graduate Cancer developing in different RF's
- curiousphoton
- · Replies 11 ·
Graduate Spacetime manifold: initial condition or result of GR?
- JustinLevy
- · Replies 4 ·
Graduate Curved spacetime and imaginary coordinate
- Orbb
- · Replies 3 ·
Graduate Why do both twins observe time dilation if they're moving apart?
- Gear300
- · Replies 37 ·
Graduate Parallel transport and geodesics
- dianaj
- · Replies 8 ·
Graduate Understanding Speed in an A,B,C Situation
- Monkfish
- · Replies 11 ·
Graduate The Curvature of Space-Time and the Big Bang Theory
- exponent137
- · Replies 6 ·
Graduate Can curved spacetime be embedded in higher-dimensional euclidean space?
- Dmitry67
- · Replies 19 ·
Graduate Spatial curvature - effect on objects
- nutgeb
- · Replies 3 ·
Graduate Why gravitational redshift prevents a perpetual motion machine
- wofsy
- · Replies 7 ·
Graduate View from a spaceship at relativistic speeds
- russdot
- · Replies 3 ·
Graduate Less elapsed time: Lorentz Transformation or Spacetime Interval ?
- Point Conception
- · Replies 4 ·
Graduate Understanding Simultaneity in Relativity and its Effects on Observations
- stovepipe
- · Replies 12 ·
Graduate Does Einstein's energy formula include potential energy?
- paweld
- · Replies 1 ·
Graduate A thought experiment to aid my undertsanding
- mtiller
- · Replies 3 ·
Graduate No (Lorentz) Invariant tensor of rank 3?
- maverick280857
- · Replies 2 ·
Graduate Numerical Relativity: Components of the Lapse Function?
- Wallace
- · Replies 1 ·
Graduate Invariant functions of the four-momenta
- evilcman
- · Replies 14 ·
I think i figured out gravity, really
- jakepdog
- · Replies 3 ·