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 Is time dilated if gravity is pulling equally in all diections?
- CosmicVoyager
- · Replies 7 ·
Graduate Backreaction of accelerated motion on spacetime curvature
- zonde
- · Replies 3 ·
Graduate More thoughts on the twin paradox. One persons view has to be an illusion?
- abbott287
- · Replies 16 ·
Graduate Parallel Projection of 3-space unto a plane at c.
- Edward Solomo
- · Replies 10 ·
Graduate How Does the Poincare Group Relate to Special Relativity and Reference Frames?
- CyberShot
- · Replies 9 ·
Why is the Tortoise Coordinate Called That?
- yenchin
- · Replies 6 ·
Graduate Can light have lateral momentum, and if so, as a particle or wave or both?
- JVNY
- · Replies 16 ·
Undergrad Possibly simplistic question about massive moving objects
- Studentyguy
- · Replies 3 ·
Graduate Performing a Global Boost in General Relativity: A Brief Guide
- keithdow
- · Replies 8 ·
Graduate Lorentz Transformation Derivation
- jimbobian
- · Replies 4 ·
Graduate Help resolving absolute motion paradox please.
- rede96
- · Replies 10 ·
Graduate Why is the light clock accurate?
- xXIHAYDOIXx
- · Replies 12 ·
Graduate Understanding Special Relativity: Time Dilation and Space Contraction Explained
- blueberrynerd
- · Replies 56 ·
Undergrad Is Time Travel Possible and How Does it Work?
- Bugge
- · Replies 30 ·
Graduate Deriving GR from maximum power
- bcrowell
- · Replies 2 ·
Graduate Can Negative Time Alter Our Understanding of Physics?
- Vinni
- · Replies 9 ·
Graduate Does spinning a massive sphere create extra gravity pull?
- Slingshot
- · Replies 1 ·
High School The C is the speed of photon ( light ) ?
- dailydc
- · Replies 58 ·
Graduate Length and Distance Contraction
- albroun
- · Replies 16 ·
Graduate Could black holes form without a singularity?
- Cosmo Novice
- · Replies 8 ·
Graduate Quantum current density in general relativity
- FunkyDwarf
- · Replies 1 ·
Graduate Does Gravity Cause Accelerating Charged Particles to Emit EM Radiation?
- Drakkith
- · Replies 8 ·
Graduate Question about Relativity of simultaneity and light clocks
- obnoxiousris
- · Replies 9 ·
Graduate Advances in michelson morley interferometer
- abluphoton
- · Replies 3 ·
Graduate Logarithmic spiral photon orbits
- jpo
- · Replies 2 ·
Graduate Is Time Measurement Unidirectional and Irreversible?
- gonegahgah
- · Replies 8 ·
Graduate Inquiry about kinetic force in STR
- psyhprog
- · Replies 6 ·
Graduate Covariant derivative of stress-energy tensor
- solveforX
- · Replies 3 ·
Graduate What is a Rest Frame and How Does it Relate to Photons and the Speed of Light?
- John15
- · Replies 13 ·
Graduate Is the equivalence principle broken when the gravitational source is absent?
- knightq
- · Replies 14 ·
Undergrad CONCERN about relativity, need a quick answer
- kirkulator
- · Replies 13 ·
Graduate Is the speed of light constant
- John15
- · Replies 33 ·
Undergrad Why is speed of light 299 792 458 m / s
- Phil Irvine
- · Replies 6 ·
Graduate Newbie question - Conceptualization of time dilation from matter's perspective
- 3781
- · Replies 1 ·
Graduate The Curvature of Space and Acceleration Confusion
- drewb
- · Replies 6 ·
Graduate Is energy conserved in cosmology according to the laws of thermodynamics?
- TrickyDicky
- · Replies 59 ·
Graduate What Would Happen if We Travel at the Speed of Light?
- Slingshot
- · Replies 6 ·
High School I have a couple questions on gravity
- Darkroman
- · Replies 2 ·
Graduate A problem in general relativity
- abueljihad
- · Replies 5 ·
Graduate How Does Time Dilation and Lorentz Contraction Fit Within SR Framework?
- grav-universe
- · Replies 12 ·
Graduate Proving M_{0i} = 0 in Special Relativity
- TrifidBlue
- · Replies 6 ·
Graduate Can you actually turn if you are travelling at c?
- flyingpig
- · Replies 19 ·
Graduate What is a Space Structure in relativity?
- NBagley119
- · Replies 9 ·
Graduate Covariant derivative of riemann tensor
- solveforX
- · Replies 11 ·
Graduate Accelerating to speed of light
- kannank
- · Replies 5 ·
Graduate Question from the FAQ on Rest Frame of a Photon
- DonB
- · Replies 60 ·
Graduate Light speed barrier / closing speed
- Mojo-electro
- · Replies 4 ·
Graduate Why is the time dimension different from the 3 space dimensions
- scottbekerham
- · Replies 45 ·
Graduate Elementary questions about connections.
- Paulibus
- · Replies 8 ·
Graduate Can more than one photon participate in pair-production?
- kannank
- · Replies 17 ·
Undergrad How does gravity affect the passage of time?
- AcrylicAce
- · Replies 5 ·
Graduate Gravitational Waves, Photons & the Uncertainty Principle
- cragar
- · Replies 16 ·
Undergrad Composition of 2 Boosts in Special Relativity
- OniLink++
- · Replies 4 ·
Graduate Time dilation in an electromagnetic potential
- Creator
- · Replies 23 ·
Graduate Is the Speed of Light Truly Unattainable in Relativity?
- DonB
- · Replies 58 ·
Undergrad Inelastic collision problem/ unequal masses.
- randombill
- · Replies 1 ·
Graduate Interaction between charges in motion
- serioca
- · Replies 1 ·
Graduate Does Time Dilation Affect Distance Measurements in Special Relativity?
- One Brow
- · Replies 83 ·
Graduate Frame Dragging & Black Holes: CTC Possibility?
- Imax
- · Replies 9 ·
Undergrad Is the Twin Paradox Truly Unsolvable?
- bodhi
- · Replies 2 ·
Graduate Who’s spin in the Einstein-Cartan theory? Source’s or test particle's?
- mings6
- · Replies 3 ·
Graduate Why is time grouped with space if they behave so differently?
- boysherpa
- · Replies 163 ·
Graduate Hamiltonian Analysis in Curved Spacetime: Is it Possible in General Relativity?
- BWV
- · Replies 2 ·
Undergrad A problem with time dilation help?
- Rishavutkarsh
- · Replies 94 ·
Graduate What is the relationship between space-time density and gravity?
- arul_k
- · Replies 21 ·
Graduate What if a black hole had a negative size ?
- modaly
- · Replies 11 ·
Undergrad Hydrogen atom to 90% the speed of light
- brad50
- · Replies 8 ·
Graduate *May be a stupid question* Does Oxygen/Nitrogen bend space-time?
- rationalist76
- · Replies 3 ·
Graduate Is Spacetime Always Flat in Regions Without Mass?
- tut_einstein
- · Replies 4 ·
Undergrad Confusion regarding Time dilation ?
- Rishavutkarsh
- · Replies 6 ·
Graduate Torsion in GR and Einstein-Cartan theory
- TrickyDicky
- · Replies 3 ·
Graduate Bacteria Space Travel: Does Speed Affect Cell Division?
- modaly
- · Replies 3 ·
Graduate How is twin paradox resolved in case of no/zero acceleration?
- San K
- · Replies 131 ·
Graduate Relativity Explained Via Movement, Not Time
- Islam Hassan
- · Replies 104 ·
High School Gravity & Mass: Question about Affecting Something with No Mass
- FrozenSnake
- · Replies 2 ·
Graduate What is the relationship between relativistic currents and Ohm's Law?
- Shark 774
- · Replies 16 ·
Graduate Open and Closed Models in Cosmology
- Anamitra
- · Replies 1 ·
Graduate Is Center-of-Mass Supraliminal?
- LarryS
- · Replies 4 ·
Graduate Relativistic Momentum: Is It a Vector in Relativistic Energy?
- jaketodd
- · Replies 7 ·
Graduate How can I access to the following reference?
- yicong2011
- · Replies 2 ·
Graduate Why does action have to be invariant?
- mmmboh
- · Replies 13 ·
Graduate Gravity's Impact on Oxygen and Particle Movement: A Scientific Inquiry
- quantify
- · Replies 3 ·
Graduate Issues with predicting Mercury's Orbit
- Mathaddict809
- · Replies 1 ·
Graduate Conservation of energy in gravitational red shift
- DeG
- · Replies 1 ·
Graduate Interchangeability of time and space
- thebiggerbang
- · Replies 6 ·
Graduate Postulate of SR re speed of light
- grzz
- · Replies 17 ·
Graduate What is the concept of four velocity and four force in special relativity?
- granpa
- · Replies 2 ·
Undergrad Our 'Background' Speed and How it Fits with Time Dilation
- jaston
- · Replies 5 ·
Graduate How is gravity described mathematically in general relativity?
- knightq
- · Replies 10 ·
Graduate Understanding Proper Time and Arc-Length in GR Geodesic Curves
- TrickyDicky
- · Replies 14 ·
Graduate Time Dilation Concept Confusion
- Bcranger 0
- · Replies 9 ·
Graduate Question about time in Lorentz Tranformation
- ophiophagous
- · Replies 6 ·
Graduate Escaping the Schwarzchild Radius
- DeG
- · Replies 5 ·
Graduate Studying Relativity: Speed Limit of c in All Inertial Frames?
- mmmboh
- · Replies 4 ·
Graduate Can Equivalence Principle Be Violated?
- sanman
- · Replies 3 ·
Undergrad Speed of light in non inertial frames
- obnoxiousris
- · Replies 4 ·
Graduate Relativity & Light: Explaining an Observation Phenomenon
- cody628496
- · Replies 4 ·
Graduate In <Cosmology> written by Weinberg, in page 109
- nadia8999
- · Replies 18 ·
Graduate Is length contraction an actual occurrence or merely an optical illusion?
- smithnya
- · Replies 13 ·
Graduate Whose Clock Wins in the Alice and Bob Time Dilation Paradox?
- Ryan_m_b
- · Replies 15 ·