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
High School Can Atomic Clocks Yield the Same Time Dilation Equation as Light Clocks?
- benorin
- · Replies 38 ·
Graduate Quantum amplitude for a particle falling into a black hole
- leo.
- · Replies 4 ·
High School What happens to the matter inside a black hole?
- KurtLudwig
- · Replies 9 ·
Undergrad Why do particles around us have finite momenta?
- TGlad
- · Replies 21 ·
Undergrad Can this event vary relatively?
- Hawkingo
- · Replies 18 ·
Undergrad Do Maxwell's equations keep the same form in different Lorentz frames?
- kent davidge
- · Replies 16 ·
Undergrad General Relativity and light deflection
- Mickey Farley
- · Replies 4 ·
Undergrad Solving for Gravity Without Gravitational Constant - Little g vs Big G
- Deleted member 658453
- · Replies 17 ·
Graduate How Do You Calculate the D'Alembert Operator in a Given Metric for GR?
- ChrisJ
- · Replies 9 ·
High School Special Relativity: Time Measurements on Two Systems - Mike's Question
- xcom2112
- · Replies 6 ·
Insights Fermi-Walker Transport in Schwarzschild Spacetime - Comments
- PeterDonis
- · Replies 0 ·
Undergrad Does Fermi-Walker rotation occur only in the plane of 4-acceleration and 4-velocity?
- kent davidge
- · Replies 7 ·
High School Traveling using space curvature
- Papo1111
- · Replies 23 ·
High School Why is light faster in cesium than in vacuum?
- Papo1111
- · Replies 3 ·
High School Does a gyroscope bend spacetime?
- nipoleon
- · Replies 21 ·
Undergrad Finding Most General Form of Rindler Coordinates
- kent davidge
- · Replies 4 ·
High School Does time dilation near the galactic center make the universe appear to be accelerating?
- Keith Wright
- · Replies 7 ·
Graduate Extra Killing Vector Field in Kerr Spacetime?
- PeterDonis
- · Replies 4 ·
Undergrad Covariant vs ordinary conservation of electromagnetic current
- gerald V
- · Replies 12 ·
Graduate Flow as a fluid-orthogonal foliation
- Apashanka
- · Replies 11 ·
High School How time dilation affects a star's lifespan and luminosity near a black hole
- neh4pres
- · Replies 1 ·
Undergrad Why d²xᵅ/dτ² is not a good expression for proper acceleration
- kent davidge
- · Replies 12 ·
Undergrad Maximally symmetric sub-manifold (2-sphere)
- Apashanka
- · Replies 25 ·
Undergrad On The Length of a Meter Stick
- DJ_Juggernaut
- · Replies 19 ·
Undergrad Geodesics in 4D Spacetime: An Overview
- Apashanka
- · Replies 9 ·
High School Time Dilation: Accelerating vs Inertial Frame
- Buckethead
- · Replies 5 ·
Undergrad How Does the Metric of a 4-D Spacetime Define Its Symmetry and Expansion?
- Apashanka
- · Replies 1 ·
Undergrad Two-way speed of light from a moving source
- Sandeep T S
- · Replies 15 ·
High School Any interest in a spacetime diagram generator?
- Freixas
- · Replies 1 ·
High School General Relativity: Finding Info on Interpretation
- Cerenkov
- · Replies 5 ·
Undergrad Solving Special Relativity Problem w/ Two Spaceships
- universal2013
- · Replies 3 ·
Undergrad Connecting Geodesic Curves and the Covariant Derivative
- Apashanka
- · Replies 11 ·
Undergrad Conservation of energy-momentum (tensor)
- Apashanka
- · Replies 22 ·
Undergrad Why are orbital paths elliptical if gravity is spacetime curvature?
- Osvaldo
- · Replies 5 ·
High School Big Rip Theory & Black Holes: Relativity Explained
- Surya Suresh
- · Replies 2 ·
Undergrad Covariant derivative of tangent vector for geodesic
- Apashanka
- · Replies 14 ·
Undergrad Implication of length contraction
- pixel
- · Replies 17 ·
Undergrad Is my reasoning about commutators of vectors right?
- JuanC97
- · Replies 3 ·
Undergrad Is there a zero-mass, vacuum Schwarzschild GR solution?
- fox26
- · Replies 27 ·
Undergrad Schwarzschild metric not dependent on time
- kent davidge
- · Replies 58 ·
Undergrad Contravariant Vector Transformation in Spherical Polar Coordinates
- Apashanka
- · Replies 13 ·
Undergrad Why does a curve appear geodesic in Cartesian but not in polar coordinates?
- Apashanka
- · Replies 12 ·
Undergrad Perturbation to Flat Space Metric: Geodesic Equation
- Apashanka
- · Replies 6 ·
High School Integral for geodesics on a unit sphere
- victorneto
- · Replies 1 ·
Graduate Riemann tensor notation with semicolon in Choquet-Bruhat
- Maddddd
- · Replies 1 ·
Undergrad Speed of Light Measured by Jupiter's Moons: Error 26%?
- Sandeep T S
- · Replies 6 ·
High School Would the spacetime diagram reflect if drawn from the rocket's frame?
- Point Conception
- · Replies 12 ·
High School Can event horizons cross for passing black holes at high speed
- deanbrown3d
- · Replies 24 ·
Undergrad Confusion about Simultaneous Events in Relativity
- Thecla
- · Replies 13 ·
Undergrad Bending of light - Newton vs. Einstein
- pixel
- · Replies 22 ·
High School Converting between frames of reference
- PleaseSpeakSlowly
- · Replies 19 ·
High School Newtonian vs. Relativistic momentum
- Davephaelon
- · Replies 19 ·
Undergrad Frame Dragging Effect vs Spin Orbit Coupling in GR
- cosmik debris
- · Replies 8 ·
Undergrad Schwarzschild: Energy Conservation at Finite r
- kent davidge
- · Replies 1 ·
High School Time Dilation Problem with Mesons
- NoahsArk
- · Replies 39 ·
Graduate Foliation of spacetime into spacelike hypersurfaces
- spaghetti3451
- · Replies 6 ·
Undergrad Inertial Ref: Can Light Photons Be a Privileged Frame?
- Opressor
- · Replies 9 ·
Undergrad Books on spacetime hypersurfaces and foliations
- kent davidge
- · Replies 2 ·
Undergrad Is Absolute Position Necessary to Understand Relativity?
- joshk
- · Replies 5 ·
Insights Solving Einstein's Field Equations in Maxima - Comments
- Ibix
- · Replies 4 ·
Undergrad Gamma in Brans-Dicke framework
- Apashanka
- · Replies 5 ·
Graduate Killing vectors corresponding to the Lorentz transformations
- wafelosek
- · Replies 6 ·
Undergrad Symmetric Connection: Does Torsion Vanish?
- kent davidge
- · Replies 3 ·
Undergrad What are the metric components in the Brans-Dicke action?
- Apashanka
- · Replies 14 ·
Undergrad Why are electric and magnetic fields observer-dependent in general relativity?
- Boltzman Oscillation
- · Replies 7 ·
Undergrad Why is the Ricci scalar the Lagrangian density for gravitational fields in vacuum?
- Apashanka
- · Replies 1 ·
Undergrad Relativistic mass and gravitational potential
- sha1000
- · Replies 6 ·
High School Presentation of mass as a physical quantity
- Buckethead
- · Replies 4 ·
Undergrad Acceleration of a relativistic particle
- kent davidge
- · Replies 7 ·
Undergrad Are X and Λ tensors in Lorentz transformations?
- kent davidge
- · Replies 5 ·
High School Time Dilation and thermal motion
- sweet springs
- · Replies 18 ·
Undergrad Allowed fields in General Relativity
- kent davidge
- · Replies 14 ·
Undergrad Uniqueness theorems for black holes
- Max Green
- · Replies 12 ·
Undergrad Invariance of timelike Killing vector of Schwarzschild sol.
- TomServo
- · Replies 3 ·
Undergrad Can the Lorentz factor be modified for non-inertial frames?
- bwana
- · Replies 12 ·
High School Spacetime curvature due to acceleration causing gravity?
- Buckethead
- · Replies 41 ·
High School What is the relationship between time and 1D space?
- andrazg
- · Replies 12 ·
Undergrad Cosmological Constant Term in Einstein Equations
- kent davidge
- · Replies 2 ·
Undergrad General Relativity rocket puzzle
- PeterDonis
- · Replies 84 ·
Undergrad What happens to the energy lost by photons in gravity?
- Hugh de Launay
- · Replies 38 ·
High School Is the Space with Ricci Scalar Zero Flat?
- Apashanka
- · Replies 16 ·
Undergrad Gravitational wave interference
- roineust
- · Replies 9 ·
Undergrad Why does the cable snap between accelerating spaceships in Arkani-Hamed's lecture?
- DarkMattrHole
- · Replies 10 ·
Undergrad Is Simultaneity in Einstein's Thought Experiment a Matter of Perspective?
- Jianping Zhang
- · Replies 22 ·
Undergrad Geodesic deviation gives twice the correct acceleration of gravity
- Jim Hasty
- · Replies 22 ·
High School How did Einstein come up with the thought of a space fabric?
- Zack K
- · Replies 18 ·
Undergrad Deriving momentum from Hamiltonian derivative in relativistic mechanics
- redtree
- · Replies 2 ·
Undergrad Penrose process in sonic black holes with massive particle analogs
- luke m
- · Replies 2 ·
High School Impression of relative velocities
- jishnu
- · Replies 14 ·
Undergrad Do photons experience the passage of time?
- YASH AWasthi
- · Replies 27 ·
Undergrad Why is energy density divided by c² equal to mass density?
- Leonardo Machado
- · Replies 2 ·
Undergrad About spacetime coordinate systems
- cianfa72
- · Replies 37 ·
Undergrad Any direct evidence of gravitational mass increase?
- hkyriazi
- · Replies 39 ·
Undergrad Why is the speed of light slower in materials than in vacuum?
- AndrewGRQTF
- · Replies 4 ·
High School "Spacetime Physics" by Taylor and Wheeler
- NoahsArk
- · Replies 32 ·
High School 4 four momentum energy component direction
- whatif
- · Replies 113 ·
Undergrad Falling electric dipole contradicts the equivalence principle?
- jcap
- · Replies 3 ·
Undergrad Why Are Maxwell's Equations Invariant Across Reference Frames?
- universal2013
- · Replies 11 ·
High School Solving the Kerr metric in the program Maxima
- exmarine
- · Replies 15 ·
Undergrad What does coupling mean in physics?
- luke m
- · Replies 5 ·