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 When moving at the speed of light time stops
- eyad-996
- · Replies 85 ·
Graduate Killing vectors and Geodesic equations for the Schwarschild metric.
- silverwhale
- · Replies 10 ·
Undergrad Why is Time DILATION Called Time DILATION?
- Artyvr
- · Replies 40 ·
Graduate What is the challenge in defining mass in general relativity?
- arindamsinha
- · Replies 12 ·
Graduate Rotating Flat Spacetime in Minkowski Metric
- parsikoo
- · Replies 3 ·
Graduate IYPT question on gravity wells and usage of elastic space.
- vishnu manoj
- · Replies 4 ·
Graduate Tensors Notation - Summation Convention - meaning of (a_ij)*(a_ij)
- metalrose
- · Replies 5 ·
Graduate Issue with deriving the Lorentz Factor
- guillefix
- · Replies 10 ·
Graduate Direct Measurement of Gravitational Wave Velocity
- chill_factor
- · Replies 16 ·
Graduate Finding v(t) at high speeds with F constant
- James Brady
- · Replies 12 ·
Undergrad Gravitational Potential & Field: Doubts & Solutions
- Vineeth T
- · Replies 63 ·
Graduate What is the stress-energy-momentum tensor and its role in general relativity?
- kevinferreira
- · Replies 36 ·
Graduate What is the Superpotential Tensor in Teleparallel Gravity?
- Worldline
- · Replies 2 ·
Graduate Logic of GR as mathematically derived
- grav-universe
- · Replies 41 ·
Graduate Understanding why Einstein found Maxwell's electrodynamics not relativistic
- GregAshmore
- · Replies 36 ·
Graduate The Energy-Momentum Tensor
- agostino981
- · Replies 4 ·
Graduate Relativity of Simultaneity concept
- Aniket1
- · Replies 20 ·
Undergrad Does My Wrist Watch Physically Beat Slower?
- Kingfire
- · Replies 96 ·
Graduate Parallel transporting of a vector in curved space
- say_cheese
- · Replies 17 ·
Graduate Area of event horizon and irreversible mass of Kerr black hole
- ck99
- · Replies 1 ·
Graduate Gravitational time dilation and special relativity time dilation
- yakmastermax
- · Replies 9 ·
Graduate Unable derive mass as Resnick \& Halliday describe it
- DavidCantwell
- · Replies 13 ·
Graduate Can Time Dilation Make Earth Appear to Speed Up During a Twin Paradox Scenario?
- Tomahoc
- · Replies 7 ·
Graduate Equivalence Principle and Gravity
- schaefera
- · Replies 7 ·
Graduate Is Brian Cox right to claim that Gravity is a strong force for large masses?
- cdux
- · Replies 14 ·
Graduate Does SR preserve the direction of light?
- jk22
- · Replies 2 ·
Undergrad Do Charged Particles Exhibit Stronger Gravitational Fields?
- quantumfoam
- · Replies 36 ·
Graduate How does mass gain at high velocities affect acceleration and inertia?
- DiracPool
- · Replies 23 ·
Graduate Distance Measures: Computing in RA α, DEC δ & Redshift Z
- Madster
- · Replies 6 ·
Undergrad Why Does Space Contract When Approaching the Speed of Light?
- Tommy1995
- · Replies 17 ·
Graduate Theory of Relativity, a poor name?
- Tomahoc
- · Replies 9 ·
Graduate Can Something Travel Faster Than Light in Different Frames of Reference?
- Drake711
- · Replies 8 ·
Graduate Find tetrad component from metric
- Worldline
- · Replies 5 ·
Graduate Black Holes - the two points of view.
- Mike Holland
- · Replies 382 ·
Graduate From field equation to equation of motion
- Madster
- · Replies 12 ·
Graduate Defining Special Frame: Math & Limitations of Preferred Frames in BM
- Tomahoc
- · Replies 13 ·
Graduate Equation of state in gravity vs microphysics
- Jip
- · Replies 11 ·
Graduate Empirical meaning of relativity in the context of QM
- bobcat321
- · Replies 4 ·
Graduate Comparing Newton & Einstein's Gravity: What Makes GR Better?
- DiracPool
- · Replies 29 ·
Graduate Einstein-Hilbert term and mass, gravity
- Tomahoc
- · Replies 5 ·
Graduate Is the Graviton Necessary for Gravity in Light of Higgs Field Discoveries?
- Mordred
- · Replies 12 ·
Graduate Universal Central Observer: Doubling Speed of Light Separation
- cdux
- · Replies 20 ·
Undergrad Hafele and Keating time dilation question
- Buckethead
- · Replies 29 ·
Graduate How can the equation E^2=(mc^2)^2+(pc)^2 be proven?
- avcireis
- · Replies 8 ·
Graduate Physical explanation of velocity time dilation
- arindamsinha
- · Replies 14 ·
Graduate Could Quantum Geons Achieve Stability Like Bohr Atoms?
- johne1618
- · Replies 2 ·
Graduate Quantum wave equations in curved space
- FunkyDwarf
- · Replies 14 ·
Graduate Can we describe the physics of a photon in an inertial reference frame?
- chwie
- · Replies 16 ·
Graduate Q: "Time Dilation: Faster = Longer Wait?
- Semifaded
- · Replies 127 ·
Roy Kerr awarded Einstein Medal
- cosmik debris
- · Replies 6 ·
Undergrad Gravity and ideas of how we can effect it on earth
- ChangingRules
- · Replies 3 ·
Graduate Centrifugal Acceleration GR: Formula for .8c, 1m Radius
- grav-universe
- · Replies 2 ·
Graduate Is time quantum at the microscopic level?
- SinghRP
- · Replies 29 ·
Graduate Second order expansion of metric in free-fall
- InsertName
- · Replies 1 ·
Graduate Which direction does boosted spin point?
- Zoot
- · Replies 11 ·
Graduate Is dτ Invariant Under Transformations Beyond Lorentz in Special Relativity?
- friend
- · Replies 36 ·
Graduate How Does the Twin Paradox Change With Beacons?
- dwlink
- · Replies 3 ·
Undergrad Is Mass a Form of Energy According to E = mc²?
- cdux
- · Replies 4 ·
Graduate A thought experiment on relativistic Electrostatics
- vinven7
- · Replies 3 ·
Graduate Overlapping observable universes
- Warp
- · Replies 27 ·
Graduate Surface gravity calculation, where am I wrong?
- hjq1990
- · Replies 1 ·
Graduate Angled light path in moving clock
- phyti
- · Replies 11 ·
Graduate Acceleration in SR makes it equivalent to GR?
- arindamsinha
- · Replies 49 ·
Graduate Lenght Contractions in Inertial Reference Frames
- smm
- · Replies 6 ·
Graduate Has relativity been proved wrong?
- KeplerJunior
- · Replies 9 ·
Graduate Prove Maxwell Eqs. Covariant: Wave Eqn & 4th-Vector Pot.
- martindrech
- · Replies 3 ·
Graduate Coordinate Tetrads: Other than Cartesian?
- Worldline
- · Replies 2 ·
Graduate Can inertial reference frame have different sizes at least in theory?
- smm
- · Replies 29 ·
Graduate Time dilation in relativity of simultaneity related to twin paradox
- timpeac
- · Replies 7 ·
Graduate Gravity vs. infinitely rigid bar
- Karl Coryat
- · Replies 4 ·
High School High Velocities Through Portals: Escape Velocity Achieved
- Vodkacannon
- · Replies 3 ·
Undergrad Time of acceleration dissipation
- whosapopstar?
- · Replies 21 ·
Undergrad Doubt in the calculation of the age of the universe?
- Vineeth T
- · Replies 11 ·
Graduate The first postulate of relativity
- metalrose
- · Replies 29 ·
Graduate Synchronized Clocks in Frames boosted by Acceleration
- Jorrie
- · Replies 49 ·
Graduate When accelerating at high %c, can apparent velocites exceed c?
- BitWiz
- · Replies 24 ·
Graduate Understanding General Covariance & Relativity Principle
- zonde
- · Replies 98 ·
Graduate Mathematically precise formulation of Ehlers-Geren-Sachs theorem
- nick41
- · Replies 1 ·
High School Wavelength Speed: 10nm vs 1mm - Does UV Travel Faster?
- Fonzi03
- · Replies 2 ·
Graduate Can Light Be the Perfect Reference Frame to Solve Problems of Reference Frames?
- aayushgsa
- · Replies 4 ·
Graduate Can Tachyons Enable Messages to the Past?
- putongren
- · Replies 2 ·
Graduate Is a black hole's mass zero according to a distant observer?
- johne1618
- · Replies 3 ·
Graduate Deriving the Metric from the Energy-Momentum Tensor
- Airsteve0
- · Replies 24 ·
Graduate How can doppler effect occur when c is indepedent of motion?
- k!rl
- · Replies 4 ·
Undergrad How to explain Einstein's Special theory of Relativity.
- Lochlan.H
- · Replies 135 ·
Graduate Why Is Thomas Precession Critical in General Relativity Calculations?
- WannabeNewton
- · Replies 3 ·
Graduate Speed of light, and path of travel, in distorted time-space
- San K
- · Replies 2 ·
Undergrad Can a nuclear bomb detonated from orbit actually destroy the Earth?
- cooleggyh
- · Replies 12 ·
Graduate Time Dilation: Object slowing down vs Subject speeding up
- coktail
- · Replies 20 ·
Graduate Is the higgs field required to have space-time warping?
- cdux
- · Replies 9 ·
Graduate Understanding the speed of light between 2 ships racing away from each other
- kjamha
- · Replies 12 ·
Graduate Alcubierre metric and gravitational waves
- gildomar
- · Replies 2 ·
Graduate Understanding Tensors & General Relativity
- jmatt
- · Replies 1 ·
Graduate Do photons obey the 1/r^2 gravity law?
- swle
- · Replies 97 ·
Graduate Notions of simultaneity in strongly curved spacetime
- PAllen
- · Replies 190 ·
Graduate Two spaceships in opposite direction at near c
- stu dent
- · Replies 56 ·
Graduate Does Hawking Radiation preclude EH formation?
- rjbeery
- · Replies 36 ·
Graduate Length Contraction vs. Distance Contraction
- arindamsinha
- · Replies 14 ·
Graduate Perceiving near c speeds from a great distance
- jam.muskopf
- · Replies 2 ·
Graduate Curvature of Spacetime related to mass and expansion
- Phys00
- · Replies 22 ·