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
Undergrad Space and the velocity of light
- keepit
- · Replies 11 ·
Undergrad Special relativity and time dilation
- DanPease
- · Replies 25 ·
Graduate Spacetime diagram drawing problem
- Trojan666ru
- · Replies 12 ·
Graduate Causality and FLT a time reference consideration
- jacob_sallgood
- · Replies 5 ·
Graduate This is a thought experiment in relativity, can you try to solve this
- Trojan666ru
- · Replies 12 ·
Graduate Gravitation as varying density of a space-propertime manifold?
- bcrelling
- · Replies 1 ·
Graduate Question about doppler shift in relativity
- skate_nerd
- · Replies 8 ·
Graduate Index notation of matrix tranpose
- birulami
- · Replies 3 ·
Undergrad Are the transformations just observed ones or real ones?
- Windows
- · Replies 140 ·
Graduate Is it impossible to separate a distance of 1light hour in space?
- Trojan666ru
- · Replies 6 ·
Graduate Could the speed of light be one of the slowest things in the universe?
- Baewrt Ardoj
- · Replies 11 ·
Graduate What is the value of Q in the equation for the Kerr-Newman Metric Tensor?
- Philosophaie
- · Replies 6 ·
Graduate Universe expansion speed vs gravitational waves speed
- Mectaresh
- · Replies 13 ·
Graduate Time Paradox: Calculating Time Dilation for Objects Moving at 90% Speed of Light
- Trojan666ru
- · Replies 3 ·
Undergrad Does space (distance) between two bodies contract according to SR?
- Trojan666ru
- · Replies 7 ·
Graduate Smaller but Larger? Understand Warped Physics in Higher Dimensions
- extrads
- · Replies 12 ·
Graduate So the freely falling rock will follow a single geodesic on its way to Earth.
- AriAstronomer
- · Replies 6 ·
Graduate Transfer of Energy through Forces like gravity
- Hyrum
- · Replies 12 ·
Undergrad What If the Speed of Light Were Just 1000 km/h?
- Numeriprimi
- · Replies 7 ·
Graduate Hamiltonian for a free particle (Special relativity)
- fa2209
- · Replies 18 ·
Did Einstein Discover the Theory of Relativity
- nauj
- · Replies 7 ·
Graduate Derivation of relativistic E_kin
- tomwilliam2
- · Replies 3 ·
Graduate Can gravity ever be a repulsive force?
- SteveDC
- · Replies 2 ·
Graduate Is it possible for a wormhole to have zero spacetime curvature?
- kochanskij
- · Replies 6 ·
Graduate Figuring out Clock Desynchronization
- kratsg
- · Replies 8 ·
Graduate Does light experience relativistic effects?
- Fiziqs
- · Replies 8 ·
Graduate Can Time Flow Even Though Space Doesn't?
- Deepak K Kapur
- · Replies 28 ·
Graduate Is Gravity Merely a Byproduct of Electromagnetic Forces?
- CDooli
- · Replies 2 ·
Graduate Using tensors and indicial notation
- Sekonda
- · Replies 2 ·
Graduate Double slit experiment on a moving train
- m_robertson
- · Replies 33 ·
Graduate Understanding the Speed of Space in Relativity
- us40
- · Replies 48 ·
Graduate Newtons 2nd Law corrected for Relativity
- SSGD
- · Replies 6 ·
Undergrad Question about time and measurement
- questionator89
- · Replies 118 ·
Graduate Metric Tensor of the Reissner–Nordström Metric
- Philosophaie
- · Replies 5 ·
Undergrad How Einstein proved equation about speed
- Hepic
- · Replies 3 ·
Undergrad Time Measurement: How Is Time Measured?
- bodhi
- · Replies 14 ·
Graduate Gravitational Waves: Slowed by Media?
- Khashishi
- · Replies 3 ·
Graduate Bell’s Spaceship Paradox In Another Way
- Trojan666ru
- · Replies 12 ·
Graduate Measuring Speed in the Universe: A Puzzling Concept
- davies65
- · Replies 9 ·
Graduate Michelson-Morley vs Tennis Balls
- Noyhcat
- · Replies 7 ·
Graduate Unequal accelerations among comoving objects
- spenserf
- · Replies 7 ·
Graduate Foucault's pendulum shows absolute motion?
- profgemelli
- · Replies 27 ·
Graduate Can We Slow Down an Object's Inertia to See It Age Faster Than Us?
- questionator89
- · Replies 23 ·
Graduate So, is light truly relative, or is its speed constant regardless of movement?
- seb7
- · Replies 7 ·
Graduate Wald General Relativity: On the homogenous cosmology, Page 178
- qinglong.1397
- · Replies 6 ·
High School Albert Einstein Proves Equations: Maths or Observation?
- Hepic
- · Replies 1 ·
Graduate This paper looks a bit sketchy.
- Menaus
- · Replies 3 ·
Undergrad Does E=mc^2 apply to the proton
- ftr
- · Replies 2 ·
Undergrad General relativity lectures by leonard susskind on youtube
- nearlynothing
- · Replies 19 ·
Graduate Is the Lightyear Pole Paradox a Violation of Physics?
- wolf_359
- · Replies 8 ·
Graduate Gradual acceleration with converging series (a thought experiment)
- Ookke
- · Replies 19 ·
Graduate What Defines a Static Spacetime and Does it Depend on the Coordinate System?
- andrewkirk
- · Replies 13 ·
Graduate What happens when you travel at near light speed and encounter paradoxes?
- Serioza
- · Replies 5 ·
Graduate The Equilibrium Point of Shrinking Charged Shell: A Classical Analysis
- michael879
- · Replies 11 ·
Undergrad Things that happens simultaneously
- Hepic
- · Replies 10 ·
Graduate How Do Lorentz Transformations Relate Time-like Four-Momenta in SO^{+}(1,3)?
- parton
- · Replies 3 ·
Graduate Relative Entanglement Nightmare
- amoses7178
- · Replies 4 ·
Graduate Understanding Minkowski Space Compactification
- ritzo
- · Replies 7 ·
Graduate How to define uniformly ticking clock defined in GR?
- center o bass
- · Replies 2 ·
Undergrad Special relativity using inertial frame moving at 1/2u
- ChemicalCarl
- · Replies 11 ·
Undergrad How does gravity distort time?
- adimantium
- · Replies 3 ·
Graduate Can Exotic Matter Escape the Gravitational Pull of a Black Hole?
- Silvertail
- · Replies 10 ·
Graduate Defining proper distance in GR.
- center o bass
- · Replies 11 ·
High School Why does time slow when you travel at high speeds?
- adimantium
- · Replies 14 ·
Graduate What is the Invariant Magnitude of 4-Acceleration?
- copernicus1
- · Replies 8 ·
Graduate Wormhole proper radial distance
- PLuz
- · Replies 1 ·
Graduate Space time with no killing vector
- IEB
- · Replies 3 ·
Graduate How exactly does FTL travel cause reverse time travel?
- cyberdiver
- · Replies 32 ·
Graduate Going Faster Than Light: What Happens When We Can't Slow Down?
- adimantium
- · Replies 12 ·
Undergrad Understanding Light Speed: A Neophyte's Question Answered in Simple Terms
- choran
- · Replies 16 ·
Graduate Flat sheet-like structure approaching a massive object
- EskWIRED
- · Replies 6 ·
Graduate The factor of 1/2 in the Einstein-Hilbert action
- pellman
- · Replies 2 ·
Graduate Gravitational Forces on Mass < Planck Mass: Evidence?
- jbunch
- · Replies 10 ·
Graduate Can the black and white holes combine?
- Eagle9
- · Replies 18 ·
Graduate Is Spacetime Like a Fluid with Surface Tension?
- Igottaknow
- · Replies 2 ·
Undergrad Text(s) for Relativity for Poets course?
- bcrowell
- · Replies 27 ·
Graduate Is Penrose's Twistor Theory Worth the Effort for Understanding Physics?
- RiccardoVen
- · Replies 11 ·
Graduate Is Lorentz Transformation an Application of Pythagoras's Theorem?
- Dappy
- · Replies 23 ·
Graduate Paradox within relativity of simultaneity
- Trojan666ru
- · Replies 4 ·
Graduate Derivative of Solid Angle: Lightmann & al. Explained
- zn53
- · Replies 1 ·
Graduate Quantum Entanglement Information.
- howabout1337
- · Replies 2 ·
Graduate Object with *multiple* velocities nearing the speed of light-effect?
- JacobQuestion
- · Replies 3 ·
Graduate Neutrinos - what is their mass when they travel so close c?
- keepit
- · Replies 26 ·
Graduate Black Hole Equations: Unraveling the Mystery - Adrian
- AdrianHudson
- · Replies 7 ·
Graduate Contemporary Physics: Preserving Einstein's Brilliance
- alvin51015
- · Replies 1 ·
Graduate How Can Light Be Affected by Black Holes Despite Having No Mass?
- Gank
- · Replies 7 ·
Graduate Herglotz-Noether theorem understanding
- yuiop
- · Replies 6 ·
Graduate Is the Bell's Spaceship Paradox a Result of Relativity of Simultaneity?
- Trojan666ru
- · Replies 10 ·
Graduate What factors affect the reaction time of a long bar?
- Magna Visus
- · Replies 4 ·
Graduate Can the Constant plane hypothesis be applied to accelerating frames?
- yuiop
- · Replies 24 ·
Undergrad Does Light Have Mass or Not?
- adimantium
- · Replies 6 ·
Graduate Questions regarding Lorentz force
- eightsquare
- · Replies 10 ·
Undergrad Einstein's SR a description of observations or a description of realit
- keepit
- · Replies 13 ·
Graduate Simple Derivation (1D) Lorentz Transformation
- phatgandy
- · Replies 5 ·
Graduate Rotating Disk Spinoff: Is 3D Timelike Congruence Born Rigid?
- pervect
- · Replies 82 ·
Graduate Did MMX's Assumptions on Light and Sound Waves Affect Their Findings?
- Gadhav
- · Replies 27 ·
Graduate Hamiltonian Formulation of GR for Elliptic Spacetime?
- korialstasz
- · Replies 9 ·
Graduate The Twin Paradox: Triplets Edition
- greswd
- · Replies 143 ·
Graduate Is the Electromagnetic Field Everywhere?
- phellen
- · Replies 10 ·
Graduate Is the unsynchronised clock actually at the place where seen to be
- rajark
- · Replies 11 ·