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 How To Understand This Lorentz Transform?
- abrogard
- · Replies 9 ·
Graduate Vielbeins: Is $$e^1.e^1$$ a Basis Like $$i.i=1$$?
- PhyAmateur
- · Replies 1 ·
Graduate Does Dirac's geodesic derivation assume a diagonal metric?
- exmarine
- · Replies 5 ·
Graduate Twin paradox with symmetric velocities in opposite directions
- doaaron
- · Replies 105 ·
Graduate Newtonian spacetime curvature without a metric
- tom.stoer
- · Replies 15 ·
Graduate Rigidly Constantly Accelerating Frame
- unscientific
- · Replies 5 ·
Graduate How do radial distances change between Schwarzschild and Kruskal-Szekeres coordinates?
- smoothoperator
- · Replies 2 ·
Graduate Does FTL Communication Alter Time Dilation for Twin Observers?
- dragoneyes001
- · Replies 21 ·
Graduate Does cosmic expansion cause time dilation between distant galaxies?
- julianwitkowski
- · Replies 1 ·
Undergrad Are acceleration and forces equal in different inertial reference frames?
- arpon
- · Replies 5 ·
Graduate Why Does Time Not Slow in a G-Field?
- Agrasin
- · Replies 2 ·
Graduate What does M=Gm/c² mean and how does it relate to Newton's law?
- TimeRip496
- · Replies 3 ·
Graduate Does Time Contraction Change Substance?
- abrogard
- · Replies 52 ·
Graduate Does 1 day at 99% light speed equal 1 year on Earth?
- Serious Max
- · Replies 1 ·
Graduate Einstein Field Equation: Understanding Curvature and Geodesic Equations
- TimeRip496
- · Replies 1 ·
Graduate Photons Travelling at Less than c in "free space"
- nitsuj
- · Replies 23 ·
Graduate Can a floating person feel the difference between free fall and zero gravity?
- haisydinh
- · Replies 14 ·
Graduate Interpretation of Relativity of Simultaneity
- lowerlowerhk
- · Replies 1 ·
Graduate Relative velocities In Space-Time Diagram
- Quarlep
- · Replies 18 ·
Graduate How to contract the christoffel symbol
- TimeRip496
- · Replies 8 ·
Graduate Killing Vectors conserved quantity along geodesic proof
- binbagsss
- · Replies 10 ·
Graduate Can a maximal charged black hole have "flavor" or weak hair?
- Larry Pendarvis
- · Replies 24 ·
Graduate A rock falling towards the center of earth according to GR
- Ott Rovgeisha
- · Replies 15 ·
Undergrad What is the intuition behind cofactor and adjugate matrices?
- TimeRip496
- · Replies 1 ·
Graduate What do Lorentz observer, Lorentz frame and spacelike vector mean?
- Dixanadu
- · Replies 10 ·
Graduate Can mass and energy be converted into each other?
- T'Pau
- · Replies 5 ·
Graduate Does the spin connection change under complex conjugation?
- samuelphysics
- · Replies 1 ·
Undergrad Einsteins thoughts behind c2 in E=mc2
- Incyder
- · Replies 6 ·
Graduate Do all massless particles carry forces?
- geordief
- · Replies 2 ·
Undergrad Perception of time, relative and distant.
- x3RangeMerge
- · Replies 3 ·
Graduate Fast Intersection of Crafts: Tau Ceti-Sol Trip
- Chinspinner
- · Replies 2 ·
Graduate Can a relativistic observer create closed timelike curves with a stationary wormhole?
- vemvare
- · Replies 3 ·
Undergrad Einstein theory on bending of space
- ronric
- · Replies 36 ·
Graduate Kerr metric and rotating stars
- luinthoron
- · Replies 17 ·
Graduate Horizontal Photon Vertical Lift Acceleration
- jk22
- · Replies 7 ·
Graduate Error in the relativistic energy-momentum derivation
- Bazinga101
- · Replies 3 ·
Graduate Do free-falling objects also curve spacetime?
- smoothoperator
- · Replies 19 ·
Graduate Lightning Bolts / Relativity of Simultaneity
- MattRob
- · Replies 2 ·
Graduate Can clocks ticking at different rates be synchronized?
- smoothoperator
- · Replies 26 ·
Graduate The reality of Relative Velocities in Special Relativity
- Quarlep
- · Replies 11 ·
Graduate Relative Magnetic Fields: What is Reality?
- abrogard
- · Replies 2 ·
Undergrad Learning to Simplify the Curvature Tensor
- TimeRip496
- · Replies 3 ·
Graduate Flaw in Traveling to Destination Several Thousand Light Years Away
- Constantine
- · Replies 6 ·
Graduate Does higher energy speed up or slow down change in a particle's wave function?
- TEFLing
- · Replies 8 ·
Graduate Light from spaceship rear at relativistic speed
- dilletante
- · Replies 6 ·
Graduate Curvature of Space-Time: Why is Covariant Derivative Nonzero?
- TimeRip496
- · Replies 7 ·
Graduate Does rotation make sense without reference objects in space?
- Amaterasu21
- · Replies 10 ·
Graduate Does the Christoffel connection break down at the Schwarzschild singularity?
- binbagsss
- · Replies 7 ·
Graduate When is the coordinate speed of light anisotropic in Schwarzschild coordinates?
- smoothoperator
- · Replies 7 ·
Graduate Time Dilation and Relative Time
- name123
- · Replies 57 ·
Graduate Are General Relativity and Special Relativity mathematically interrelated?
- WhiskeyRenegade
- · Replies 1 ·
Graduate Why does my relativistic gas pressure formula include v/c?
- Jeremy Wittkopp
- · Replies 3 ·
Graduate What is the formula for calculating relative velocities in Special Relativity?
- Quarlep
- · Replies 6 ·
Graduate Covariant Derivative: Understanding Motivation Quickly
- binbagsss
- · Replies 3 ·
Graduate Is the metric symmetric in all coordinate systems?
- binbagsss
- · Replies 6 ·
Graduate Deriving gravitational red shift from a star's surface
- 21joanna12
- · Replies 6 ·
Undergrad Why is the cosmic microwave background radiation continuous if the Big Bang was finite?
- JKFlyguy
- · Replies 2 ·
Graduate Does gravitational time dilation mean event horizons are relative to the observer?
- wolverwookie
- · Replies 2 ·
Graduate Event horizon in different coordinate systems
- smoothoperator
- · Replies 51 ·
Graduate Old article on Hawking radiation
- stevebd1
- · Replies 1 ·
Graduate Geodesic equation proof confusing me
- Superposed_Cat
- · Replies 1 ·
Graduate GR: Accelerated Observer's Local Speed of Light
- smoothoperator
- · Replies 5 ·
Undergrad Does light direction in relativity need adjustment for mirror motion?
- Gireesh
- · Replies 5 ·
Graduate Dynamical Spacetime: Time or Space Dependent?
- kau
- · Replies 3 ·
Graduate Can Alcubierre warp bubbles be observed if they travel faster than light?
- KeithLucas
- · Replies 2 ·
Graduate Constructing solutions to Einstein Field Equation
- NotASmurf
- · Replies 2 ·
Graduate Meaning of tensor invariant, covariant differentiation
- binbagsss
- · Replies 7 ·
Graduate Why does time appear to slow down on a moving spaceship?
- leonid.ge
- · Replies 6 ·
Kip Thorne's Black Holes and Time Warps and Interstellar
- aabottom
- · Replies 1 ·
Graduate Expression for the line element ds^2
- TimeRip496
- · Replies 26 ·
Graduate Can Wormholes Enable Time Travel Without Space Displacement?
- Starlover
- · Replies 17 ·
Graduate Time Travel to the Past: CTC or Wormhole?
- novella
- · Replies 2 ·
Graduate Coord. Transf.: V'μ from (dy/dx)*Vν
- TimeRip496
- · Replies 2 ·
Graduate Transform Coordinate System: Curvy to Euclidean Space
- TimeRip496
- · Replies 1 ·
Graduate Need for SR to Explain Magnetic Forces?
- pantheid
- · Replies 3 ·
Graduate Learning tensor math to work through GR solutions
- BiGyElLoWhAt
- · Replies 2 ·
Graduate Understanding Well-Defined Tensor on Manifold: Basic Concepts
- binbagsss
- · Replies 2 ·
Graduate Why does time dilation affect physical processes, not just clocks?
- CaraKboom
- · Replies 57 ·
Graduate When will neutronization occur in the black hole formation process?
- bcrelling
- · Replies 55 ·
Graduate Simplifying dummy indices when they appear across multiple terms
- binbagsss
- · Replies 4 ·
Graduate Does spacetime interval invariance imply metric tensor properties?
- jmatt
- · Replies 5 ·
Graduate What does null mean for vectors, surfaces and coordinates in GR?
- qtm912
- · Replies 7 ·
Undergrad How to represent things in terms of the Kronecker delta
- TimeRip496
- · Replies 6 ·
Graduate Time dilation paradox with three reference frames at 0.8c
- Palpatine
- · Replies 1 ·
Graduate Does relativistic motion make gravity appear weaker in thought experiment?
- DiracPool
- · Replies 28 ·
Undergrad Is It Possible to Determine Motion in Relativity?
- Gireesh
- · Replies 7 ·
Undergrad Black Holes: Questions from a Non-Scientist
- orionis
- · Replies 4 ·
Graduate Lorentz Transformation: Matrix Relation, Metric Tensor
- TimeRip496
- · Replies 1 ·
Graduate General relativity vs special relativity
- Starlover
- · Replies 4 ·
Undergrad Why does the traveling twin see the stationary twin in slow motion?
- Starlover
- · Replies 2 ·
Graduate Time Travel: Why Only to CTC's Creation?
- Starlover
- · Replies 1 ·
Graduate Can black holes have topologies other than a 2-sphere?
- martinbn
- · Replies 5 ·
Graduate What is the difference between covariant and contravariant vectors?
- LeonPierreX
- · Replies 2 ·
Graduate Einstein's Formulation of Tensor Equation: Was He Lucky?
- barong
- · Replies 1 ·
Graduate Light halo shape when a light bulb moves at half light speed
- dragoneyes001
- · Replies 18 ·
Graduate Infinitesimal Mass & Distant Space: GR Effects
- Blayde Keel
- · Replies 4 ·
Graduate How does Maxwell equation suggest that the speed of light is the same
- kakolukia786
- · Replies 30 ·
Graduate The Light Clock Problem: Resolving Observer Discrepancies
- Quarlep
- · Replies 3 ·
Graduate What is the metric tensor and how does the Kronecker delta relate to it?
- TimeRip496
- · Replies 10 ·
Graduate Can gravity cause an object to reach the speed of light?
- Peter Frame
- · Replies 2 ·