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 What is the Relativity of Simultaneity?
- Aziza
- · Replies 5 ·
Graduate How does the unbreakable speed of light controversy works?
- Psinter
- · Replies 26 ·
Graduate Why Does the Phase Velocity Exceed c in Certain Cases?
- McLaren Rulez
- · Replies 6 ·
Graduate Transforming co- and contravariant 4-vectors
- EricTheWizard
- · Replies 4 ·
Undergrad Learning general relativity as a beginner
- aditya23456
- · Replies 11 ·
Graduate Covariant Derivation of the Ricci Tensor: Einstein's Method Now Online
- nobraner
- · Replies 2 ·
Graduate 4-vector law of motion in different inertial frames
- Wox
- · Replies 1 ·
Graduate Is stress a source of gravity?
- Q-reeus
- · Replies 264 ·
Graduate Does Relativistic effect applies to light as well?
- nikeadidas
- · Replies 2 ·
Graduate Sense of Absolute in Relativity?
- nikeadidas
- · Replies 8 ·
Graduate Why does AdS space always return thrown objects in finite time?
- LAHLH
- · Replies 2 ·
Undergrad Where to find experimental data on time dilation
- iamBevan
- · Replies 2 ·
Graduate Denominator in cosmological constant term in Newtonian gravity
- Messenger
- · Replies 2 ·
Undergrad What is the shape of an electron's circular motion in a magnetic field?
- komodekork
- · Replies 6 ·
Graduate Derivation of Proper Time in General Relativity
- paultsui
- · Replies 5 ·
Undergrad Is force of gravity dependent on speed of one of the body?
- aditya23456
- · Replies 68 ·
Graduate How Does Observer Proximity Affect Clock Synchronization in Different Frames?
- mananvpanchal
- · Replies 29 ·
Graduate Effect of acceleration on shape and size of a light wave front
- MikeLizzi
- · Replies 27 ·
Graduate Do all observers measure faster-than-light neutrinos as faster than light?
- Trinitiet
- · Replies 11 ·
Undergrad Einstein's Theory of Relativity - Is Light Speed Absolute?
- squareroot
- · Replies 2 ·
Graduate Ricci tensor component Rij in FRW metric with k=0
- psimeson
- · Replies 21 ·
Undergrad Why doesn't light experience time dilation like fast-moving objects do?
- c0ke
- · Replies 50 ·
Graduate Metric Connection from Geodesic Equation
- alex3
- · Replies 2 ·
Undergrad Do moving objects appear length-contracted and time-dilated to distant observers?
- korbbit
- · Replies 8 ·
Undergrad Why does light always travel at the same speed relative to me?
- Ricardgomes
- · Replies 12 ·
Graduate One way speed of light measurement proposal
- ValenceE
- · Replies 56 ·
Graduate CPT (M?) symmetries in Kerr-Newman metric
- michael879
- · Replies 62 ·
Undergrad Can you explain Einstein's train thought experiment?
- markf
- · Replies 6 ·
Graduate Non-diff theories of dynamical spacetime
- julian
- · Replies 4 ·
Graduate Why do parallel moving charges attract if they're stationary in their rest frame?
- jose 892
- · Replies 17 ·
Graduate Force of gravity in relativity
- SUROJL
- · Replies 2 ·
Graduate Would a relativistic ship really need much shielding?
- Albertgauss
- · Replies 1 ·
Graduate Gravitational Equivalent of Rindler Space
- Chestermiller
- · Replies 15 ·
Graduate References for a Lightspeed Ship
- Albertgauss
- · Replies 5 ·
Graduate Simultaneity of Events, Do I Have it Right?
- Drakkith
- · Replies 1 ·
Graduate Relativistic interpretation question?
- enotstrebor
- · Replies 17 ·
Graduate What evidence shows time dilation actually occurs?
- kyeohti
- · Replies 5 ·
Graduate Calculating Muon Half-Life: Length Contraction vs Time Dilation
- mananvpanchal
- · Replies 2 ·
Graduate Is the Earth just a mass within a vast, curved space-time fabric?
- doey
- · Replies 2 ·
Graduate What would happen when Blackholes Collide?
- suchal
- · Replies 6 ·
Graduate Is Light's Mass Infinite at the Speed of Light?
- thedude36
- · Replies 14 ·
Undergrad Will a moving mirror reflect my image at all speeds?
- chaimc
- · Replies 36 ·
Graduate What do points on the manifold correspond to in reality?
- wacki
- · Replies 24 ·
Graduate How Are Muon Velocities Measured in Storage Rings?
- arindamsinha
- · Replies 7 ·
Undergrad Does time change in empty space or near black holes?
- drymetal
- · Replies 12 ·
Graduate What is quadratic gravity and its role in pp-waves?
- graupner1000
- · Replies 2 ·
Graduate Extremely Basic Question Regarding Time Dilation
- Capngarrett
- · Replies 6 ·
Graduate Magnetism seems absolute despite being relativistic effect of electrostatics
- universal_101
- · Replies 156 ·
Graduate Special relativity and rest mass of a photon
- Lizwi
- · Replies 5 ·
Graduate Looking for Post on Uniform Acceleration in Relativity
- qraal
- · Replies 2 ·
Graduate What is the difference between active and passive diffeomorphism?
- exponent137
- · Replies 13 ·
Graduate Magnetism as a relativistic effect
- cdot
- · Replies 5 ·
Undergrad Why does the ISS stay in orbit if astronauts experience zero gravity?
- kghosh
- · Replies 2 ·
Graduate Lorentz Vs. Einstein Who Wins?
- John232
- · Replies 71 ·
Undergrad Constant c and not its invariance.
- dpa
- · Replies 8 ·
Undergrad Special relativity practice problems for second year
- Lizwi
- · Replies 5 ·
Graduate Einstein equation and particle jets
- Rami.Rom
- · Replies 11 ·
Graduate Length Contraction rearrangement
- mananvpanchal
- · Replies 77 ·
Graduate How Does Mass Relate to Time in Relativity Theory?
- Gabrell
- · Replies 1 ·
Graduate What is the problem with gravity?
- eiyaz
- · Replies 11 ·
Graduate Where does binding energy, or internal kinetic energy exist?
- mrspeedybob
- · Replies 3 ·
Undergrad Why does c have to be the speed of light
- drinkey
- · Replies 5 ·
Graduate Curved trails by motion of heavenly bodies in space
- dpa
- · Replies 3 ·
Graduate Why should the speed of light be the same in every frame of reference.
- Lizwi
- · Replies 4 ·
Graduate Two layered discs rotating at relativistic angular velocities
- Alexrose12345
- · Replies 6 ·
Undergrad Why is the speed of light invariant for all reference frames?
- Adel Makram
- · Replies 18 ·
Graduate Explanation time dilation/duration by a force maybe
- digi99
- · Replies 7 ·
Graduate Plane wave in Minkowski space-time
- Wox
- · Replies 3 ·
Graduate Where does the gamma factor in Lorentz transformations come from?
- Lizwi
- · Replies 1 ·
Graduate Center of momentum frame with photons?
- Darkmisc
- · Replies 1 ·
Graduate Minkowski's 1908 law of motion in modern notation
- snoopies622
- · Replies 8 ·
Undergrad What is the equation E = m₀c²/√(1−v²/c²)?
- Lizwi
- · Replies 3 ·
Graduate Is the Norm of Four-Acceleration Always Equal to Proper Frame Acceleration?
- johnahn
- · Replies 2 ·
Graduate What does ⊕ mean in special relativity?
- Lizwi
- · Replies 1 ·
Graduate Is travel at almost infinite speed (FTL) actually possible?
- eohjelle
- · Replies 5 ·
Graduate Region the light never reaches the 'uniformly-accelerated' observer?
- johnahn
- · Replies 5 ·
Graduate Whats the physical meaning of a covariant derivative?
- faeriewhisper
- · Replies 7 ·
Undergrad Does the water current analogy explain time dilation?
- tybomb
- · Replies 2 ·
Graduate How can particles approach light speed if all motion is relative?
- Cibek
- · Replies 17 ·
Graduate How Does Gravity Affect Light with Zero Mass?
- squareroot
- · Replies 6 ·
Graduate The No Hair Theorem and the Gravitational Field of Black Holes
- causalset
- · Replies 6 ·
Graduate How Does Relativistic Two-Way Momentum Appear to Different Observers?
- John232
- · Replies 45 ·
Graduate Why do we use the tangent and cotangent space?
- The1337gamer
- · Replies 13 ·
Graduate Galilean Invariance and the Special Principle of Relativity
- mangaroosh
- · Replies 1 ·
Graduate How to use S-metric to periastron precession of binary stars
- Vincentius
- · Replies 4 ·
Graduate Why does mercury precess forward if gravity appears weaker to a distant observer?
- grav-universe
- · Replies 9 ·
Graduate A good grad-level intorduction to general relativity
- taylrl3
- · Replies 3 ·
Graduate Should a neutrino be moving slightly slower than c?
- San K
- · Replies 3 ·
Graduate Electromagnetic tensor in cylindrical coordinates
- ngkamsengpeter
- · Replies 15 ·
Graduate Reframing the Special Theory of Relativity
- pawprint
- · Replies 18 ·
Graduate Deflection of light through a relativistic glass rod.
- yuiop
- · Replies 18 ·
Graduate Fingerprint of God type physics; what's meant and what qualifies?
- tybomb
- · Replies 10 ·
Graduate Measuring Frequency of Trans Planckian Blue Shift
- yuiop
- · Replies 1 ·
Undergrad Rest energy of a sample of pure matter
- jaketodd
- · Replies 11 ·
Graduate Why can't photons reverse annihilate ?
- Darkmisc
- · Replies 5 ·
Graduate Does gravitational redshift of photons between galaxies relate to dark energy?
- prime axiom
- · Replies 5 ·
Graduate Relativistic Doppler shift for perpendicular mirror reflection
- yuiop
- · Replies 4 ·
Graduate What are present problems with alcubierre drive?
- dpa
- · Replies 6 ·
Graduate Can a Tachyon Observe Light Traveling Faster Than Itself?
- dynkindiagram
- · Replies 21 ·
Undergrad A compressed spring has more mass
- bobsmith76
- · Replies 26 ·