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 Absolute Velocity of the Earth?
- WilliamLP
- · Replies 8 ·
Graduate Is Time Subjective or Objective in Spacetime?
- riezer
- · Replies 9 ·
Graduate Understanding Space Distortion in General Relativity
- MrNerd
- · Replies 6 ·
Einstein's The Field Equations of Gravitation Paper
- lzkelley
- · Replies 2 ·
Graduate Covariant Derivative: Understanding $\partial_i e_j=\Gamma^{k}_{ij} e_k$
- RedX
- · Replies 13 ·
Undergrad Is the speed of expansion of the universe faster than light?
- Rishavutkarsh
- · Replies 61 ·
Graduate Laypersons problems understanding Black Holes
- kmart888
- · Replies 8 ·
Graduate What is the mathematical explanation behind red/blue shift caused by gravity?
- DeG
- · Replies 1 ·
Graduate Time-Invariant Space: Metric ds^2 and Coordinates
- alejandrito29
- · Replies 1 ·
Graduate Help Me Reconcile This Thought Experiment | 65 Characters
- Jon Bright
- · Replies 7 ·
Graduate How can we test space-time for pseudo-Riemannian-ness?
- fr.jurain
- · Replies 79 ·
Graduate Does time stands still at c? And is room a point then?
- danov
- · Replies 15 ·
Graduate Are there any similarities between GR tensorial
- physicquest
- · Replies 2 ·
Undergrad Is Faster than Light Time Travel Possible?
- abledpilot
- · Replies 40 ·
Graduate Question on Time Dilation Experiment
- BobWylie
- · Replies 3 ·
Undergrad Speed of Gravity the Same in All Reference Frames?
- jaketodd
- · Replies 7 ·
Graduate Gravitational Time Dilation - Is my head older than my feet?
- Awol_01010001
- · Replies 9 ·
Undergrad Origins of the idea of a tachyon? (and a greeting)
- Phlippieskeze
- · Replies 4 ·
Undergrad Thoughts travelling faster than c
- Cbray
- · Replies 16 ·
Graduate Which Clock Slows Down with Time Dilation?
- Hivoyer
- · Replies 6 ·
Graduate Gradient of a tensor in cylindrical coordinates
- hanson
- · Replies 5 ·
Graduate Does the expansion of Space require continuous energy?
- Herbascious J
- · Replies 10 ·
Graduate Polarization states via relativistic effect
- nomadreid
- · Replies 9 ·
Graduate Where is potential energy in relativistic formula of energy?
- ndung200790
- · Replies 3 ·
Graduate Can Electrons Overcome Gravity in a Black Hole?
- cragar
- · Replies 4 ·
Graduate Gravity: A Matter of Spacetime Compression?
- YoungDreamer
- · Replies 5 ·
Graduate How Does Relativity Affect Observations of Light by Alice and Bob?
- TimDubya
- · Replies 7 ·
Graduate Writing Sci-fiction Graphic Novel need advisement in space travel
- cruggero
- · Replies 37 ·
Graduate Equivalence Classes in Physics: Tutorial Papers & Relationship to Units
- pervect
- · Replies 3 ·
Graduate Wormholes & Conservation of Energy
- biscuitcrush
- · Replies 2 ·
Graduate Connecting Two endpoints in space using a Wormhole.
- EarthDecon
- · Replies 17 ·
Posting Diagrams Multiple Times: Is it Possible?
- pervect
- · Replies 2 ·
Undergrad I remember reading somewhere about how a wormhole lets you see
- Cbray
- · Replies 2 ·
Graduate Entropy as a measure of time in relativity
- Galteeth
- · Replies 3 ·
Undergrad Can We Physically Handle Extreme Speeds in Spacecraft and Simulated Gravity?
- wilsonb
- · Replies 17 ·
Graduate Action at a distance v curvative of space
- bobsmith76
- · Replies 10 ·
Graduate What Are the Radial and Tangential Accelerations in the Kerr Metric?
- Jorrie
- · Replies 2 ·
Graduate Help with energy momentum relation.
- randombill
- · Replies 5 ·
Undergrad Would a Conveyor Belt from Earth to Mars Have a Time Delay?
- nbj622
- · Replies 4 ·
Graduate Understanding Homothetic Vector Fields: Intuition and References
- JohnSimpson
- · Replies 2 ·
Graduate Photon Time: 10B Years, 0 Seconds?
- chaszz
- · Replies 7 ·
Graduate Empirical verification of conditions for Hawking singularity theorem when Λ≠0?
- bcrowell
- · Replies 9 ·
Graduate What is Einstein Notation for Curl and Divergence?
- JDoolin
- · Replies 14 ·
Graduate Can we truly know the fate of objects in black holes?
- Jagella
- · Replies 49 ·
Graduate Mass of trapped photons vs. Mass of potential energy
- cephron
- · Replies 2 ·
Graduate Don't fully get Lorentz equations
- usernamer
- · Replies 20 ·
Graduate Why is the Time component in the Space Time Interval negative?
- hmsmatthew
- · Replies 26 ·
Graduate Momentum of massive classical free field
- atyy
- · Replies 12 ·
Graduate How can local gravity be calculated in a gravitational field?
- Pengwuino
- · Replies 11 ·
Graduate Does Mach's Principle Work Both Ways?
- WCOLtd
- · Replies 9 ·
Graduate De Broglie wavelength shift in gravitational fields
- e2m2a
- · Replies 4 ·
Graduate Is a (-,-,-,-) metric signature meaningful?
- jfy4
- · Replies 2 ·
Graduate How Does Gravitational Time Dilation Relate to Gravitational Red-Shift?
- Zman
- · Replies 14 ·
Graduate Lorentz covaraince of differntial operator
- McLaren Rulez
- · Replies 44 ·
Undergrad Does the concept of a singularity defy the laws of nature?
- abbott287
- · Replies 19 ·
Undergrad Can a Box be Bigger on the Inside? | Dr. Who Fans
- mrspeedybob
- · Replies 1 ·
Graduate Is Walking at Constant Latitude with Your Arm Pointing North Parallel Transport?
- RedX
- · Replies 15 ·
Graduate A question about the relationship between light and time.
- rede96
- · Replies 6 ·
Graduate Plausibility arguments for noninteraction of parallel beams of light
- bcrowell
- · Replies 18 ·
Undergrad Discovering the Paradox of Being Your Own Grandfather in Futurama
- WCOLtd
- · Replies 5 ·
Graduate Hand-wavy proof of (part of) Birkhoff's theorem
- bcrowell
- · Replies 7 ·
Graduate Can't make a clock out of light
- bcrowell
- · Replies 2 ·
Graduate Can calculus find the momentum of light?
- lugita15
- · Replies 143 ·
Undergrad Is E=m*c² the Key to Understanding the Universe's Equilibrium?
- solarblast
- · Replies 12 ·
Graduate Problem with relativity of simultaneity original example
- baivulcho
- · Replies 68 ·
Graduate Energy-momentum of non-free classical particle
- atyy
- · Replies 2 ·
Graduate Fermi-Walker transport geodesic
- teddd
- · Replies 17 ·
Graduate How Is Rest Mass Defined in a Universe with No Absolute Rest?
- hanii
- · Replies 11 ·
Undergrad What Is the Time Dilation Formula and How Does Speed Affect Time?
- Jaynte
- · Replies 3 ·
What Is the Significance of Speed Differences in Driving?
- Hippasos
- · Replies 17 ·
Graduate Force on a massless classical particle
- atyy
- · Replies 11 ·
Graduate Instantaneous Communication Between 2 Stationary Observers
- consal
- · Replies 11 ·
Graduate Is relativistic momentum conserved?
- grav-universe
- · Replies 20 ·
Graduate Wrong Time Dilation: Why Observers Disagree
- stanley.st
- · Replies 9 ·
Graduate The difference between big delta and small delta?
- aCHCa
- · Replies 1 ·
Graduate Parallel transport of a vector.
- Avijeet
- · Replies 27 ·
Graduate Are Angles Relative? - Physics Thought Experiment
- rede96
- · Replies 47 ·
Graduate Do time and space exist within the universe?
- Pete81t
- · Replies 22 ·
Graduate Planetary Orbits calculated from the Metric
- Philosophaie
- · Replies 12 ·
Graduate Why can't there be a center of relativistic mass?
- consal
- · Replies 6 ·
Graduate Describing Time to a Philsopher
- WCOLtd
- · Replies 17 ·
Graduate Geometric shape of Minkowski space
- thehangedman
- · Replies 13 ·
Graduate Is Time Real? Proving Its Existence
- Zac Einstein
- · Replies 72 ·
Graduate Lorentz Transformation on a Wave Function
- bobc2
- · Replies 3 ·
Graduate Is there a simple equation for the trajectory of light in a gravitational field?
- lovetruth
- · Replies 21 ·
Graduate The gauge of general Relativity
- tunafish
- · Replies 12 ·
Undergrad Speed of Sound, Light, and Time?
- soryy708
- · Replies 2 ·
Graduate Time dilation/ light speed-thought experiments
- DeG
- · Replies 37 ·
Graduate Simulation for Newton's gravity, GR to be added later.
- CarlB
- · Replies 3 ·
Graduate What happens to the geometry of a spinning disk as it rotates about its center?
- lovetruth
- · Replies 15 ·
High School Is this GR Explanation Accurate for Teaching 9th Graders?
- mishima
- · Replies 4 ·
Graduate Does Potential Energy Have Mass, Even When Negative and Non-Unique?
- ralqs
- · Replies 11 ·
Graduate Two expression for relativistic acceleration
- Pi-Bond
- · Replies 8 ·
Undergrad Is the concept of a perpetual motion machine feasible in the realm of physics?
- guss
- · Replies 104 ·
Graduate Light - What exactly is happening?
- cowmoo32
- · Replies 150 ·
SR/GR FAQs: Check out the Latest List
- Dale
- · Replies 2 ·
Graduate Acceleration is perpendicular to velocity
- Naty1
- · Replies 11 ·
Graduate Speed of light hypothetical question
- anti666
- · Replies 14 ·
Graduate The Spaceship experiment: Questions on Light's Inertia and Measuring Distance
- DonB
- · Replies 25 ·
Graduate Time and physicality of dimensions
- Octavianus
- · Replies 4 ·