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 If CERN's claim is true, how would SR and GR change?
- zeromodz
- · Replies 1 ·
Undergrad If light has no weight, how can it push objects?
- Jarfi
- · Replies 68 ·
Graduate Faster than light and time travel into the past.
- AH_AHSAN
- · Replies 1 ·
Graduate Yet another one on the twin paradox/proper acceleration
- fluidistic
- · Replies 13 ·
Graduate What can the rest frame of a neutrino possibly mean?
- Mosis
- · Replies 3 ·
Graduate Effect of gravity on time dilation.
- adrian53300
- · Replies 2 ·
Graduate Relativistic Momentum: Mass, Velocity & Lorentz Factor
- khil_phys
- · Replies 2 ·
Graduate Is Matter Ultimately Made Up of Photons?
- worwhite
- · Replies 27 ·
Graduate BH fall time = pi*m. What is external time?
- keithdow
- · Replies 20 ·
High School How Close Are We to Understanding Time and Space?
- UnBoxedCat
- · Replies 7 ·
Graduate Neutrinos traveling faster than C?
- Northern
- · Replies 3 ·
Graduate Contraction of the Riemann Tensor with the Weak Field Metric
- JMedley
- · Replies 4 ·
Graduate Is Gravity a force or the chape of spacetime?
- tkav1980
- · Replies 3 ·
Graduate Time Dilation: Is it Counterintuitive?
- snoopies622
- · Replies 52 ·
Graduate Notation Convention: Primes in Coordinate Transformations
- Steely Dan
- · Replies 1 ·
Graduate Relativistic mass of falling body
- zonde
- · Replies 6 ·
Undergrad Why does the rest mass of an object increase when it's in motion?
- Freeze3018
- · Replies 8 ·
Graduate Relativistic Mass vs. Invariant Mass.
- DNMock
- · Replies 8 ·
Graduate Quick Tensor Question: Difference between Vector and Ordered n-Tuple
- HJ Farnsworth
- · Replies 13 ·
Graduate Resultant Gamma after Einstein velocity addition
- wil3
- · Replies 2 ·
Undergrad Self-learning special relativity
- nitro92
- · Replies 5 ·
Graduate Lorentz transformations formulas
- blueberrynerd
- · Replies 6 ·
Journal of cosmology and gravitation
- alejandrito29
- · Replies 4 ·
Graduate One Way Speed Of Light - Definition & Experiments
- whosapopstar?
- · Replies 23 ·
Graduate How Does Acceleration Affect Time Dilation in Twin Space Travel Scenarios?
- Agerhell
- · Replies 30 ·
Graduate Time/electromagntec spectrum and causality
- Mordred
- · Replies 6 ·
Graduate What exactly is compressed at very fast speeds?
- chaszz
- · Replies 14 ·
Graduate Using cadabra to calculate antisymmetric tensor field
- aries0152
- · Replies 7 ·
Graduate TIME DILATION. WHY do clocks that are
- abbott287
- · Replies 215 ·
Graduate What does it means to say two events are simultaneously observed?
- Fewmet
- · Replies 3 ·
Graduate Can Phase Velocity Exceed the Speed of Light and Enable Time Travel?
- byron178
- · Replies 11 ·
Graduate Solving Spaceship Chase Scene Relative Velocity Problem
- frerelupin
- · Replies 5 ·
Graduate Black hole falling time for external observer
- keithdow
- · Replies 1 ·
Undergrad Relations between kinetic energy, momentum and velocity
- new_r
- · Replies 9 ·
Graduate What is the outcome of the twin paradox in a new version?
- Agerhell
- · Replies 1 ·
Graduate Schwarzschild and Newton potential
- Passionflower
- · Replies 6 ·
Graduate Speed of light for different observers
- sisoev
- · Replies 139 ·
Graduate Einstein's Mirror Thought Experiment: Debunking the Luminiferous Aether Theory
- spaghetti3451
- · Replies 3 ·
Graduate Divide in space and time component
- aries0152
- · Replies 6 ·
Graduate Is curved space allowed to show discontinuities (steps)?
- bahamagreen
- · Replies 3 ·
Graduate Visualizing Minkowski geometry
- dEdt
- · Replies 6 ·
Undergrad Regarding constancy of speed of light
- anupam1031
- · Replies 6 ·
Graduate Spacetime curvature and the force pulling an object down the curvature
- Trevormbarker
- · Replies 8 ·
Graduate Question on submanifolds of a semi-riemannian manifold
- PAllen
- · Replies 4 ·
Graduate Two identical black holes, but rotating in opposite directions collide
- Greglar
- · Replies 2 ·
Undergrad Is the speed of light any faster in low density space than in high
- keepit
- · Replies 11 ·
Graduate How emission theory was disproved by de sitter binary star experiment?
- techysafi
- · Replies 1 ·
Graduate Clarification on mass-energy tensor and 4-velocity.
- MathematicalPhysicist
- · Replies 1 ·
Graduate Does a gravitating body have to undergo gravitational collapse?
- zonde
- · Replies 35 ·
Graduate Slightly confused about embedding picture and imagining spacetime
- jmz34
- · Replies 2 ·
Undergrad Time Dilation: Impact on GPS Accuracy
- nordqvist11
- · Replies 4 ·
Graduate What does added mass mean for a spaceship travelling at the speed of light?
- richerrich
- · Replies 3 ·
Graduate Changing Gravitational Effects of Rapidly Moving Objects
- CurvedSpace
- · Replies 2 ·
Graduate Susskind Lecture - accelerate reference frames
- csmcmillion
- · Replies 14 ·
High School Free Fall & Gravity: Feelings & Differences
- rajeshmarndi
- · Replies 10 ·
Graduate Covariant global constants of motion in GR?
- tom.stoer
- · Replies 23 ·
Graduate What Causes Earth's Motion in General Relativity?
- ShayanJ
- · Replies 8 ·
Graduate The shape of space-time around a star
- RayYates
- · Replies 27 ·
Graduate Gravitational redshift, energy and the EP
- TrickyDicky
- · Replies 10 ·
Undergrad Does E=mc2 Work with Different Metric Systems?
- Jarfi
- · Replies 8 ·
Graduate Progress on detection of gravitational waves?
- Agerhell
- · Replies 2 ·
Graduate Field Energy and Time Dilation in Relativistic Motion
- keepit
- · Replies 3 ·
Graduate Why can we use metric tensors to lower index of Christoffel symbol
- ZealScience
- · Replies 15 ·
Graduate Length Contraction: Observing Light Hits on a Train
- agmateo
- · Replies 16 ·
Graduate Hafele and Keating, local gravity field as preferred frame?
- Agerhell
- · Replies 8 ·
Undergrad A Bus travelling at a very high speed.
- Naveen123
- · Replies 4 ·
Graduate Comprehensive list of cosmological models and their properties?
- tom.stoer
- · Replies 1 ·
High School Gravitational Waves: Have They Been Directly Detected?
- dEdt
- · Replies 2 ·
Graduate Accelerating spaceship paradox
- yeknod71
- · Replies 3 ·
Graduate What is the path of earth in 4-d space?
- Rishavutkarsh
- · Replies 4 ·
Graduate Is Time Truly Relative in Physics?
- bleachigo
- · Replies 8 ·
Graduate Why is the sign in Einstein's equation's RHS often presented differently?
- TrickyDicky
- · Replies 4 ·
Graduate How Do Time Dilation and Ringdown Waves Affect Black Hole Merger Observations?
- zhermes
- · Replies 13 ·
Undergrad Classic and Relativity Kinetic Energy
- Kakorot
- · Replies 16 ·
Graduate How far does space-time bend out in space?
- johann1301
- · Replies 4 ·
Graduate Question regarding photons and mass
- Molecule
- · Replies 3 ·
Graduate Does a Black Hole Ever Collapse?
- CJames
- · Replies 22 ·
Graduate Old experiments with superluminal speed
- Molecule
- · Replies 3 ·
Graduate Does simulataneity contradicts the constancy of speed of light
- universal_101
- · Replies 5 ·
Graduate Planck constant is Lorentz invariant?
- keji8341
- · Replies 170 ·
Undergrad Gravitational waves predicted by Einstein
- BruceW
- · Replies 3 ·
Graduate Rotating black holes in Penrose diagrams
- relativityfan
- · Replies 11 ·
Graduate Confused about issues related to Time
- kakram
- · Replies 8 ·
Graduate Doubt about Relativity: Is it Possible?
- helios.jones
- · Replies 1 ·
Graduate Gravity Probe B / precession question
- elegysix
- · Replies 2 ·
Graduate Is the Speed of Light Really the Limit of the Universe?
- easyrider
- · Replies 2 ·
Undergrad How Does Time Dilation Explain the Twin Paradox?
- aglo6509
- · Replies 11 ·
Graduate General Relativity vs Geometrodynamics
- mhob
- · Replies 3 ·
Graduate What is the true magnitude and direction of Thomas precession?
- utesfan100
- · Replies 6 ·
Graduate How Can Two Black Holes Merge Within the Age of the Universe?
- Mordred
- · Replies 11 ·
Graduate Total gravity of all mass and energy in Universe.
- Mordred
- · Replies 7 ·
Graduate Question about approaching light speed of a rotating object
- firefox5926
- · Replies 4 ·
Undergrad How Do High Velocity Objects Influence Time Dilation?
- keepit
- · Replies 1 ·
Graduate The three vectors in the Null Geodesic equation
- Philosophaie
- · Replies 8 ·
Graduate Why don't gravitational waves get distorted?
- Naty1
- · Replies 7 ·
Graduate Is the current black hole horizon observable?
- Naty1
- · Replies 4 ·
Graduate Simultaneity and Spacelike Interval
- anxmetal
- · Replies 2 ·
Graduate What Geometrical Symmetry Do FRW Metrics Exhibit?
- TrickyDicky
- · Replies 6 ·
Graduate Mini Black Hole Loose on Earth, eek
- Phrak
- · Replies 15 ·
Undergrad Time Dilation and the Flawed World Record Attempt: A Physics Explanation
- anxmetal
- · Replies 2 ·