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 Can Two Black Holes Merge Without Breaking Thermodynamic Laws?
- Quantum1332
- · Replies 10 ·
Graduate Formula for converting redshift to velocity
- TrickyDicky
- · Replies 11 ·
Graduate Experimental tests of the stress energy tensor
- relativityfan
- · Replies 20 ·
Graduate Why does charge density equal the current 4-vector flux?
- Abrain
- · Replies 7 ·
Graduate Gravitational acceleration VS the speed of light
- Accuser
- · Replies 4 ·
Graduate The Schwarzschild Metric - A Simple Case
- Passionflower
- · Replies 177 ·
Graduate Light, gravity, and red shift.
- mrspeedybob
- · Replies 3 ·
Graduate How Do Four-Vectors Add Nonlinearly in Relativity?
- Rasalhague
- · Replies 4 ·
Graduate What Does Anisotropic Effective Mass Mean?
- inflector
- · Replies 3 ·
Graduate Can Gravitational Waves Exist in a Static Spacetime?
- TrickyDicky
- · Replies 1 ·
Graduate Time Dilation: Clark Kent's Scenario
- j3enator
- · Replies 2 ·
Graduate Irrelvancy of motion in C perspective
- JJRittenhouse
- · Replies 34 ·
Graduate Understanding General Relativity: Gravity Warping Space-Time
- Bobbyam
- · Replies 5 ·
Graduate Perihelion advance expressed differently
- TrickyDicky
- · Replies 18 ·
Graduate GR/Hawking Radiation Contradiction
- abomination
- · Replies 1 ·
Graduate How Does the Minkowski Metric Explain Special Relativistic Effects?
- telegramsam1
- · Replies 15 ·
Graduate Can someone explain Gravitational Time dilation?
- Radek01
- · Replies 25 ·
Undergrad How Does the Expansion of the Universe Affect Inertia and Mass?
- chupe1123
- · Replies 12 ·
Graduate Why Does the Minus Sign Matter in Space-Time Interval?
- komodekork
- · Replies 8 ·
Graduate How do I get my physics postulate reviewed?
- VacuumChamber
- · Replies 15 ·
Undergrad Needing a solid example of a composite mass value
- lenfromkits
- · Replies 22 ·
Graduate On black holes and relativity.
- James Leighe
- · Replies 2 ·
Undergrad Any alternative article websites for students/teens?
- arianabedi
- · Replies 2 ·
Graduate Why do light rays follow null geodesics in curved spacetime?
- paweld
- · Replies 15 ·
Graduate Universe inflation faster than c
- norvegicusbas
- · Replies 3 ·
Graduate Is the Gravitational Constant a Tensor or a Constant Derived from Experiment?
- khemist
- · Replies 4 ·
Graduate How Does Length Contraction Work in Einstein's Relativity?
- nonequilibrium
- · Replies 2 ·
Graduate Is gravitational time dilation equivalent to inertial mass increase?
- inflector
- · Replies 11 ·
Graduate Is Minkowski space the only Poincare invariant space?
- Rearden
- · Replies 10 ·
Undergrad Gravitational attraction of a spherically symmetrical mass
- Bernie G
- · Replies 16 ·
Graduate Static axisymmetric massless scalar field solutions with vanishing Ricci tensor
- Chris Hillman
- · Replies 6 ·
Graduate How would gravity affect a human at Earth's core?
- tanzanos
- · Replies 16 ·
Graduate Is the wire necessary to create a B field?
- idea2000
- · Replies 9 ·
Graduate Time dilation or length contraction
- teodorakis
- · Replies 7 ·
Graduate What Lorentz Covariant Objects Can You Name?
- Phrak
- · Replies 9 ·
Graduate Are Geodesics in Outer Space Curved or Straight Paths?
- TrickyDicky
- · Replies 59 ·
Graduate General relativity breaks down at Planck scale
- mersecske
- · Replies 34 ·
Undergrad Velocity needed for a certain change in time
- Molybdenum
- · Replies 10 ·
Graduate Light clock with something else than light
- homer5439
- · Replies 10 ·
Graduate Weyl curvature and tidal forces
- TrickyDicky
- · Replies 23 ·
Graduate Why hasn't relational mechanics by Assis replaced relativity theory?
- Jonnyb42
- · Replies 30 ·
Graduate E.p. implies no gravitational shielding?; Feynman?
- bcrowell
- · Replies 101 ·
Graduate Understanding Congruences, Rigidity: Week of Sickness & Busyness
- Fredrik
- · Replies 7 ·
Graduate GRT: Wrong Picture of Basic Cosmology?
- jensel
- · Replies 1 ·
Undergrad Why doesn't the traveling twin age as the Earth orbits in the twin paradox?
- gctskippy
- · Replies 17 ·
Graduate New to GR, having trouble with lagrangian calculation
- LoopQG
- · Replies 4 ·
Graduate How do you envision a gravitational field?
- jnorman
- · Replies 8 ·
Graduate The length of a falling elevator
- yuiop
- · Replies 45 ·
Graduate Why are simultaneous events in the train frame not simultaneous in the ground frame?
- ambarish
- · Replies 20 ·
Undergrad Trying to understand time delineation
- Vivaci
- · Replies 3 ·
Graduate Gravitational Attraction of a Massive Particle
- GuyWQuestion
- · Replies 4 ·
Graduate Time for Light to Travel in a Gigantic Spaceship
- pavi_elex
- · Replies 1 ·
Graduate The Einstein and Ricci tensors
- TrickyDicky
- · Replies 3 ·
Graduate Is the Newtonian EOM Invariant under Galilei Boosts?
- haushofer
- · Replies 13 ·
Graduate Calculating the variation of the Ricci scalar
- sourena
- · Replies 19 ·
Graduate Max Velocity Below c When Falling from Infinity to Black Hole?
- Austin0
- · Replies 4 ·
Graduate Why does ds² denote a metric tensor rather than an area element?
- Rasalhague
- · Replies 16 ·
Undergrad Time Relativity: Does Velocity Change?
- ConstantineWW
- · Replies 5 ·
Graduate Maxwell's idea to measure aether
- ghwellsjr
- · Replies 4 ·
Graduate Dark Matter and Thorne's unlikely time travel
- nomadreid
- · Replies 1 ·
Undergrad Does aging and decay slow down for objects in time dilation?
- cyberfish99
- · Replies 4 ·
Graduate How do metric sign conventions affect the Klein-Gordon and Dirac equations?
- iangttymn
- · Replies 5 ·
Graduate 'relativity' of radiation of uniformly accelerating charge
- PAllen
- · Replies 9 ·
Graduate Explaining time dilation vs clock effects in GPS satellites
- MaeWest
- · Replies 6 ·
Graduate Can SR handle acccelerating frames?
- Ich
- · Replies 18 ·
Graduate Hypervelocity stars and RX J0822-4300
- Redsummers
- · Replies 4 ·
Graduate Does Relativistic Kinetic Energy Increase with Velocity?
- accountkiller
- · Replies 4 ·
Undergrad Relativity at cern - deflection
- RK1992
- · Replies 11 ·
Graduate Ehrenfest / rod thought experiment.
- yuiop
- · Replies 93 ·
Graduate Can length contraction cause an object to exceed black hole density?
- 2.71828
- · Replies 2 ·
Graduate Born-rigid angular acceleration of degenerate objects
- bcrowell
- · Replies 38 ·
Graduate Balance of Forces - Electrostatic Force vs. Gravitational Force
- TheSicilianSa
- · Replies 18 ·
Undergrad What is the difference between mass and energy?
- jnorman
- · Replies 28 ·
Graduate Does absolute zero stop time if time requires atomic movement?
- tanzanos
- · Replies 22 ·
Graduate How does mass affect time near the Great Pyramid of Giza?
- PhysicsAdict
- · Replies 2 ·
Graduate Levi-Civita pseudotensor sign change under coordinate reflection
- Mesmerized
- · Replies 10 ·
Graduate Derivation of Proper Time, Speed, and Acceleration in SR
- stevmg
- · Replies 14 ·
Undergrad Why does the gravitational field equation give infinity at Earth's center?
- Ralph Spencer
- · Replies 10 ·
Graduate General relativity with infinite speed of light?
- mersecske
- · Replies 38 ·
Graduate A red herring is a debating tactic that seeks to divert an opponent
- ClamShell
- · Replies 3 ·
Graduate Why Lorentz transformation coefficients depend only on velocity u
- Petar Mali
- · Replies 3 ·
Graduate Constancy of metric tensor components as a test of curvature
- Rasalhague
- · Replies 9 ·
Undergrad Is Faster Than Light Travel Possible Through Black Holes?
- kogaht
- · Replies 6 ·
Graduate Derivation of proper time in acceleration in SR
- stevmg
- · Replies 100 ·
Graduate Does Gravitational Time Dilation imply mass change?
- johne1618
- · Replies 1 ·
Graduate How does curvature limit the size of a local Lorentz frame?
- Rasalhague
- · Replies 26 ·
High School Wondering e=mc^2 is derived from what equations
- karan1114
- · Replies 2 ·
Graduate Does Extreme Gravity Alter the Value of Pi?
- ravisastry
- · Replies 14 ·
High School How does length contraction work?
- bhsmith
- · Replies 14 ·
Undergrad Relativity: light in train with person in it
- accountkiller
- · Replies 3 ·
Graduate Are currents significant on cosmological scales?
- mersecske
- · Replies 1 ·
Graduate Does a moving observer see a stationary clock ticking slower?
- ritzmax72
- · Replies 5 ·
Graduate Derivation of Hyperbolic Representation from Lorentz/Minkowski equations in SR
- stevmg
- · Replies 43 ·
Graduate Reflection from a moving mirror in special relativity
- maverick280857
- · Replies 5 ·
philosophical quotations about general relativity
- mersecske
- · Replies 14 ·
High School Why some physicists argue time dilation is false
- bhsmith
- · Replies 23 ·
Graduate Light Bending in Accelerating Elevators
- trizz10
- · Replies 1 ·
Undergrad Can objects move away faster than light beyond the observable universe?
- elmarto
- · Replies 19 ·
Graduate Voyager probes and time dilation
- Andru10
- · Replies 11 ·
Graduate Is Time the Fifth Dimension in Spacetime?
- Jonnyb42
- · Replies 25 ·