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 Does embedding dimension affect curvature tensors in GR?
- dismachaerus
- · Replies 2 ·
Graduate How does curved space-time produce acceleration?
- xcourrier
- · Replies 25 ·
Undergrad How do black holes create shortcuts through space?
- EdLeMarchant
- · Replies 5 ·
Graduate Coarse-Grained Einstein Tensor from Weyl Tensor
- stevendaryl
- · Replies 2 ·
Graduate Why doesn't an electron have infinite mass if it moves at light speed?
- Einstein Jr.
- · Replies 20 ·
Graduate Couple of questions regarding general relativity?
- Christian Grey
- · Replies 3 ·
Graduate Stress Energy Tensor Components
- space-time
- · Replies 14 ·
Graduate How to find gravity using general relativity?
- Christian Grey
- · Replies 13 ·
Graduate Commutator of two covariant derivatives
- ibazulic
- · Replies 5 ·
Graduate Effect of spinning compressed magnetic fields on eddy currents and gravity
- MagMad
- · Replies 4 ·
Graduate Validity of Schwarzschild Metric in Real BHs
- MattRob
- · Replies 5 ·
Graduate What is the Purpose of the Geodesic Equation in General Relativity?
- space-time
- · Replies 9 ·
Graduate Tensor software for General Relativity
- Herb1989
- · Replies 17 ·
Graduate What is the significance of proper time in the Rain Frame of General Relativity?
- MattRob
- · Replies 8 ·
Graduate Derive Lorentz Transformations w/ Special Relativity
- Devin
- · Replies 1 ·
Graduate Properties of light in 2 moving reference frames
- pixel
- · Replies 29 ·
Graduate How does this proof demonstrate the concept of time dilation?
- Raman Choudhary
- · Replies 51 ·
Graduate Would an infinite universe has a finite diameter?
- newjerseyrunner
- · Replies 7 ·
Graduate Acceleration in a space time diagram
- DiracPool
- · Replies 7 ·
Graduate Why Do Gravitational Waves Occur?
- Mistake Not...
- · Replies 5 ·
Graduate Understanding Inertial Frame of Reference
- Gadhav
- · Replies 8 ·
Graduate Does atomic mass include the mass equivalent of internal energy?
- Dadface
- · Replies 10 ·
Undergrad Black Hole Effects: What Would Happen?
- Mateo C.
- · Replies 3 ·
High School Gravity: Einstein vs. Newton View
- AF HUNZAI
- · Replies 2 ·
Graduate Gravity as a distorion of space-time
- EngWiPy
- · Replies 7 ·
High School Gravitational red shift and gravitational time dilation
- Ahmed Samra
- · Replies 14 ·
Graduate Can we use acceleration formulas for gravitational time dilation?
- Stephanus
- · Replies 13 ·
Graduate What is the boost hamiltonian in the Unruh effect?
- naima
- · Replies 4 ·
High School Do different velocities on Earth create different time frames?
- frankin garcia
- · Replies 7 ·
Graduate What happens to destination time at light speed and faster than light?
- AlexDB9
- · Replies 19 ·
Graduate Relativistic velocity addition with constant acceleration
- Stephanus
- · Replies 40 ·
Graduate Lorentz scalars - transformation of a scalar field
- "Don't panic!"
- · Replies 4 ·
Graduate Calculating relativistic effects of motion in solar system
- KenJackson
- · Replies 3 ·
Graduate General Relativity and continuum mechanics
- niahl
- · Replies 1 ·
Graduate Trying to clear up some confusion (clock synchronization)
- rede96
- · Replies 31 ·
Graduate Measuring Motion: What STAY Knows About TRAVEL
- Stephanus
- · Replies 2 ·
Graduate How does matter know how to move?
- PeterDonis
- · Replies 4 ·
High School Why does light travels in all directions?
- atuldpatil
- · Replies 1 ·
Graduate Why don't tensor calculations reveal special features like wormholes or CTCs?
- space-time
- · Replies 3 ·
Graduate Weyl tensor for the Godel metric interpretation
- space-time
- · Replies 26 ·
Graduate Does a Photon Experience Time or Space During Travel?
- $H3K
- · Replies 32 ·
Graduate General Lorentz transformation, spatial vector components
- JD96
- · Replies 10 ·
Graduate Meaning of r in Schwarzchild coordinates
- PWiz
- · Replies 56 ·
Graduate Train Experiment Problem: Solve Derailment Mystery!
- Stephanus
- · Replies 4 ·
Graduate Traveling near the speed of light
- EngWiPy
- · Replies 69 ·
Graduate Describe the mechanism in GR causing *Space* expansion
- Glurth
- · Replies 22 ·
Graduate What Happens to Euler-Lagrange in Field Theories (ADM)?
- nonequilibrium
- · Replies 4 ·
Graduate Does the Hubble expansion of space have a preferred frame?
- Strilanc
- · Replies 13 ·
Graduate Doppler formula for sound and light with moving source and receiver
- Stephanus
- · Replies 50 ·
Graduate Twins Paradox: Nature Cheats but B Gets Fooled
- Stephanus
- · Replies 6 ·
Graduate Can relativity of simultaneity lead to contradictory outcomes?
- Rohit Solanki
- · Replies 46 ·
Graduate Torsion Scalar and Symmetries of Torsion Tensor
- nanuba
- · Replies 5 ·
High School Time Travel - Does It Create a New Dimension?
- TachyonRSC
- · Replies 6 ·
High School Is there theoretically a smallest possible Schwarzschild radius?
- Shaw
- · Replies 12 ·
Graduate What Are the Differences Between Space-like and Time-like Events in Spacetime?
- Mikeal
- · Replies 8 ·
Graduate Why do diffeomorphic manifolds have physically identical properties?
- synoe
- · Replies 12 ·
Graduate Why does imaginary time behave like space?
- Ien Cleary
- · Replies 9 ·
Graduate Space-intervals, proper time, and proper distance
- Stephanus
- · Replies 5 ·
Graduate Measuring distance, speed and clock
- Stephanus
- · Replies 114 ·
Graduate Solving Exercise 13.7 MTW Using Light Signals
- TerryW
- · Replies 2 ·
Graduate Special Relativity Train Scenario
- kasha
- · Replies 4 ·
Graduate Measuring Speed with Doppler Effect: Questions and Challenges
- Stephanus
- · Replies 9 ·
Graduate Doppler Effect in Relativity: Mirror vs Lamp
- Stephanus
- · Replies 5 ·
Graduate Can the Higgs field explain relativistic effects like time dilation and mass increase?
- CaptainNorway
- · Replies 4 ·
Graduate Stationary/extremal L for timelike/null/spacelike geodesics
- bcrowell
- · Replies 42 ·
Graduate Does simultaneity depend on which reference frame observers are in?
- Stephanus
- · Replies 18 ·
Graduate Consequences of space-/time-/light-like separations
- "Don't panic!"
- · Replies 4 ·
High School Can rapidity exceed infinity using Cantor's transfinite numbers?
- AlexDB9
- · Replies 4 ·
Graduate When can I assign periodicity to Euclidean time in a metric?
- Einj
- · Replies 2 ·
Graduate D'Alembert operator is commute covariant derivative?
- dhalilsim
- · Replies 3 ·
Graduate Time: Travelling Twins vs Black Hole Gravity
- Bryan S.
- · Replies 5 ·
Undergrad Particles with mass can't reach speed of light?
- SpiderET
- · Replies 18 ·
Graduate Why are coincident events frame-independent in relativity?
- "Don't panic!"
- · Replies 41 ·
Graduate Normal Vector for Null Surfaces: How to Define and Fix it Completely?
- Kurret
- · Replies 4 ·
Graduate Proving Maxwell's Equations are Lorentz Invariant
- Bakali Thendo
- · Replies 5 ·
Graduate Does the speed of light vary for photons in different conditions?
- Stephanus
- · Replies 11 ·
Graduate Athlete Holding a 20m Pole in a 10m House
- Noctisdark
- · Replies 1 ·
Graduate How Does Time Dilation Affect Hawking Radiation Emission Near Black Holes?
- mivanit
- · Replies 4 ·
Graduate Measuring One-Way Speed of Light
- cooperm
- · Replies 48 ·
Graduate Does spacetime curvature produced by an object affect the object itself?
- ORF
- · Replies 10 ·
Graduate Force Transform Applying: Question on a Specific Case
- dan_b_
- · Replies 1 ·
Graduate Let's Sort Out This Gravity Thing - c And All That
- Wallis
- · Replies 14 ·
Graduate Is All Motion Relative to Feynman's Path Integral?
- RyanH42
- · Replies 1 ·
Graduate Hamiltonian of General Relativity
- Physicist97
- · Replies 1 ·
Graduate New MINOS measurement of neutrinos speed through earth
- Enoy
- · Replies 12 ·
Graduate How to determine which clock runs slower in relativity?
- Max Johnson
- · Replies 26 ·
Undergrad Effects of Velocity Aberration?
- Bahmanyar
- · Replies 16 ·
Undergrad Does intensity or frequency affect the speed of light?
- ORF
- · Replies 14 ·
Graduate Is speed of light in vacuum an axiom in relativity?
- Premanand
- · Replies 11 ·
Graduate Why does light travel at c in both the astronaut's and Earth's frames?
- Gary Boothe
- · Replies 6 ·
Graduate Metric Tensor of a line element
- Tony Stark
- · Replies 2 ·
Graduate Deriving the Definition of the Christoffel Symbols
- Physicist97
- · Replies 8 ·
Graduate Can gravitational time dilation allow backwards time travel?
- Invutil
- · Replies 3 ·
Graduate Can we detect if Earth's radius is slowly expanding?
- Wes Tausend
- · Replies 71 ·
Graduate Gravity Forces Us to Move: PF Forum
- Stephanus
- · Replies 7 ·
Graduate "Semi" Synchronous coordinates
- merav
- · Replies 1 ·
Graduate Is there measureable spacetime distortion from EM fields
- bwana
- · Replies 19 ·
Graduate How should I think about null geodesics?
- TheWonderer1
- · Replies 17 ·
Graduate Apparent horizon for the eternally accelerated observer
- naima
- · Replies 29 ·
Graduate Schutz page 294 (Deflection of light)
- Mr-R
- · Replies 9 ·