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 How does mass create curvature in spacetime?
- SinghRP
- · Replies 47 ·
Undergrad Ticking Clock and Pendulumn Thoughts
- NWH
- · Replies 1 ·
Graduate What Is Dirac's Identity in Minkowski Spacetime?
- Abrain
- · Replies 1 ·
Graduate What if E=mc² was wrong?
- .euphoria
- · Replies 22 ·
Graduate Is Faster-Than-Light Travel Possible Through Quantum Entanglement or Wormholes?
- Christov84
- · Replies 7 ·
High School Definition of inertial and non-inertial frames of reference
- LBrandt
- · Replies 42 ·
Graduate Light's constant speed and frames of reference
- 1MileCrash
- · Replies 5 ·
Graduate How do we determine the global geometry of thin shells in GR?
- mersecske
- · Replies 4 ·
Undergrad Education in Relativity Theory
- witchesofus
- · Replies 5 ·
Graduate Understanding Time Dilation in Frames of Reference: A Basic Question
- abcd2357
- · Replies 5 ·
Graduate Is My Calculation Correct for Topological Action with Veirbein and Levicivita?
- jinbaw
- · Replies 42 ·
Does "What You Don't See" Apply to Special Relativity?
- bernhard.rothenstein
- · Replies 5 ·
Graduate Why does relativity give imaginary time differences for faster-than-light travel?
- Nikola Mitic
- · Replies 5 ·
Graduate If faster-than-light travel were discovered, would physics need rewriting?
- Physics-Learner
- · Replies 16 ·
Old Relativity Texts - Download Free from Archive.org
- matheinste
- · Replies 2 ·
Graduate Understanding Relativity and the Potential for Faster-than-Light Travel"
- jbar18
- · Replies 16 ·
Graduate Does extrinsic curvature depend on which way the normal vector points?
- mersecske
- · Replies 5 ·
Graduate Where can I find the derivation of the Lanczos equation
- mersecske
- · Replies 10 ·
High School What is an inertial reference frame?
- Tempest
- · Replies 7 ·
Graduate Why did Einstein change his prediction about bended light?
- Bjarne
- · Replies 3 ·
Graduate Speed of light Described by relativistic mechanics
- bhsmith
- · Replies 2 ·
Graduate Can Graphene/Nanotubes Change Mass?
- sanman
- · Replies 2 ·
Graduate Why is the speed of light a universal constant beyond Maxwell's equations?
- rahuljayanthb
- · Replies 4 ·
Undergrad Why photons don't fall to Earth?
- looka
- · Replies 24 ·
Undergrad Why is additional complexity necessary for understanding 3D space?
- mdl
- · Replies 3 ·
Graduate Understanding Dual Manifolds in General Relativity
- Phrak
- · Replies 1 ·
Graduate Calculating the area of a sphere
- vitaniarain
- · Replies 6 ·
High School Faster than light? Faster than light Faster than light
- Dr Lots-o'watts
- · Replies 6 ·
Graduate Time Dilation: What's the Rest Frame?
- hawkingfan
- · Replies 7 ·
Undergrad 5 Light-Year long stick question
- RCulling
- · Replies 68 ·
Graduate Time Dilation of Stationary Photons
- Swiss Army
- · Replies 8 ·
Graduate Can Any Continuous Coordinate Transformation Be a Local Poincare Transformation?
- micomaco86572
- · Replies 8 ·
Graduate MTW Formula 25.38 Coordinate Time
- Passionflower
- · Replies 21 ·
Undergrad Possibility of Traveling Faster Than Light?
- OneQuestion
- · Replies 4 ·
Graduate How would this experiment play out? Length contraction / black hole
- mrspeedybob
- · Replies 2 ·
Graduate Learning general relativity and tensor calculus with free online resources
- Hyperspace2
- · Replies 2 ·
Graduate Can a train traveling near light speed really enable time travel?
- guss
- · Replies 7 ·
Undergrad Does E=mc² imply objects in darkness have less energy?
- matthayzon89
- · Replies 6 ·
Graduate Well-motivated theories with nonzero PPN ζ?
- bcrowell
- · Replies 4 ·
Graduate Relative Length to Relative Volume
- Aureum
- · Replies 1 ·
Graduate Is There a Fundamental Limit on Acceleration in the Universe?
- mXSCNT
- · Replies 3 ·
Graduate Force due to gravity vs force due to accelratio
- Reuben Smith
- · Replies 28 ·
Undergrad Could Rapid Spinning Affect Gravity on the Moon?
- nution
- · Replies 5 ·
Graduate Simultaneity in General Relativity
- syra
- · Replies 2 ·
Graduate Einstein's second postulate (one-way speed of light)
- ghwellsjr
- · Replies 2 ·
Graduate Why are mass and energy related by the speed of light?
- Kyxha
- · Replies 27 ·
Undergrad How Does Matter Curvature Affect Spacetime in General Relativity?
- Hyperspace2
- · Replies 3 ·
Graduate Questions about Einstein SR interpretation
- Simplyh
- · Replies 50 ·
High School What does E=mc² actually mean and represent?
- AfRoMaNn
- · Replies 2 ·
Graduate Why isn't light described in terms of the vector potential?
- Phrak
- · Replies 5 ·
Graduate Geometric interpretation of the spacetime invariant
- fuzzytoad
- · Replies 2 ·
Graduate Time dilation in an acc. vs gr. field
- Reuben Smith
- · Replies 12 ·
Graduate Absolute motion's point of reference
- yoelhalb
- · Replies 125 ·
Graduate Newtonian vs Special Relativity: Arguments Against Special Rel
- bhsmith
- · Replies 4 ·
Graduate Is aging in the twin paradox real or just apparent?
- ananthu
- · Replies 60 ·
Graduate Law conservation of charge relativistic
- Petar Mali
- · Replies 10 ·
Graduate Electromagnetic waves relativistic
- Petar Mali
- · Replies 20 ·
Graduate What is the significance of the Lorentz transformation matrix and its trace?
- Petar Mali
- · Replies 3 ·
Graduate Tidal effects as a test to distinguish gravity from acceleration
- Reuben Smith
- · Replies 1 ·
Graduate Does flat spacetime actually exist around us?
- psmitty
- · Replies 17 ·
Graduate Blueshift/redshift asymmetry in a relativistic round-trip probe thought experiment
- kamenjar
- · Replies 4 ·
Graduate How do spinors differ from tensors?
- pellman
- · Replies 8 ·
Graduate Electromagnetic Potential Gauge Transformations
- Petar Mali
- · Replies 3 ·
Graduate Does General Relativity Affect Electrostatic Forces?
- Qubix
- · Replies 3 ·
Undergrad Why does gravity work the same on all masses?
- Sirandar
- · Replies 49 ·
Can time be stopped?
- roger
- · Replies 32 ·
Undergrad How Does Gravity Affect Energy When Jumping on the Moon?
- ZirkMan
- · Replies 29 ·
Graduate Can Light Hook or Tether Enable Faster Than Light Travel?
- jaspatrick
- · Replies 6 ·
Graduate Simultaneity and a thought experiment
- RespeckKnuckl
- · Replies 10 ·
Graduate Opposite Side of GR: Is it Possible?
- zonde
- · Replies 5 ·
Graduate Is Time Dilation Creating an Infinite Loop Between A and B's Observations?
- phylove
- · Replies 2 ·
Graduate Frames can really travel faster than light?
- Buzzworks
- · Replies 7 ·
Graduate Grandfather Paradox: Debunking the Myth of Time Travel and Altering the Past
- Godswitch
- · Replies 8 ·
Graduate Why do we specify chart image is open?
- LAHLH
- · Replies 4 ·
Graduate Why doesn't general relativity define what space is?
- Ikoro
- · Replies 15 ·
Graduate How can a photon move if it doesn't experience time?
- taylrl3
- · Replies 11 ·
Graduate Curvature of spacetime inside of stars and planets
- relativityfan
- · Replies 28 ·
Graduate Time dilation due to SR plus GR
- powerplayer
- · Replies 5 ·
Graduate Synchronization of Earth clocks
- psmitty
- · Replies 4 ·
Graduate Most fundamental reason why boosts have to have L(-v)L(v)=I?
- bcrowell
- · Replies 5 ·
Graduate Is Minkowski Space Considered a Metric Space?
- damnedcat
- · Replies 19 ·
Graduate Blue shifted cosmic microwave background photons
- shomas
- · Replies 5 ·
Graduate No. of field equations and components or Riemann tensor?
- damnedcat
- · Replies 5 ·
Graduate General Relativity and Heisenberg Uncertainty
- rubenvb
- · Replies 14 ·
Graduate Can you fall into a non-accreting back hole?
- kamenjar
- · Replies 34 ·
Graduate Constructing a Valid Coordinate System for Local Flatness in General Relativity
- andrewkirk
- · Replies 5 ·
Graduate Tidal Effects in the Schwarzschild Metric
- Passionflower
- · Replies 12 ·
Graduate What is the exact change in frequency for an approaching object?
- lenfromkits
- · Replies 24 ·
Graduate How does light behave when emitted opposite to the movement of its source?
- Alle_
- · Replies 19 ·
Graduate Gravitational redshift from doppler shift
- TrickyDicky
- · Replies 7 ·
Graduate I am missing something in the train paradox
- merlinisproof
- · Replies 3 ·
Undergrad How Does Galaxy Rotation Impact Rocket Ship Travel?
- jeremyfox4392
- · Replies 4 ·
Graduate See light that is red-shifting z > 5.4
- niceboar
- · Replies 39 ·
Graduate What is the Krasnikov Metric for Wormholes and How Does It Create Exotic Matter?
- nomadreid
- · Replies 2 ·
Graduate Antisymmetric Metric: Exists in GR?
- micomaco86572
- · Replies 5 ·
Graduate Angular momentum in curved spacetime
- nickyrtr
- · Replies 2 ·
Graduate How to draw a spacetime diagram
- granpa
- · Replies 21 ·
Graduate Could Special Relativity Explain Pioneer Spacecraft's Gravitational Anomaly?
- Jeltz
- · Replies 11 ·
Graduate How do you calculate delta-T' for an observer traveling near a black hole?
- powerplayer
- · Replies 9 ·
Graduate The Speed of Light - Nothing can go faster?
- Korlus
- · Replies 38 ·