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 is the electromagnetic tensor derived?
- GarageDweller
- · Replies 13 ·
Graduate Metric of a static, spherically symmetric spacetime
- vin300
- · Replies 12 ·
Graduate Time as non-fundamental physical quantity
- Nemanja989
- · Replies 15 ·
Graduate Movement in curved spacetime via deforming one's body
- rorix_bw
- · Replies 2 ·
Graduate Are Black Holes Minimal Surfaces in a Flat Universe?
- JPBenowitz
- · Replies 5 ·
Graduate Why are gravity forces on going in the context of GR
- jp7
- · Replies 3 ·
Graduate Einstein's Length Contraction A problem?
- ft_c
- · Replies 20 ·
Graduate Lorentz Boosted 2-Sphere: Solving the Problem
- Adam Lewis
- · Replies 3 ·
Graduate Real vs Simulated: Examining Time Dilation in Relativity
- billa12
- · Replies 6 ·
Graduate Does Traveling Faster Than Light Violate Causality? | V>c
- GarageDweller
- · Replies 16 ·
Graduate Weird version of covariant derivative on wikipedia
- GarageDweller
- · Replies 5 ·
Graduate Is my understanding of the equivalence principle correct?
- GarageDweller
- · Replies 43 ·
Graduate Mass Observed to Increase as Velocity Increases?
- crybllrd
- · Replies 1 ·
Graduate Riemann tensor cyclic identity (first Bianchi) and noncoordinate basis
- miracu113
- · Replies 1 ·
Graduate Get A Reference for f(R) Gravity
- thecoop
- · Replies 3 ·
Graduate Metric tensor in spherical coordinates
- GRstudent
- · Replies 104 ·
Graduate Quantifying relativity of simultaneity
- dr.fluis
- · Replies 13 ·
Graduate Minkowski metric - to sperical coordinates transformation
- soi
- · Replies 3 ·
Undergrad E=mc2: Understanding the Squaring of Light Speed
- Neferkamichael
- · Replies 24 ·
Graduate Time and gravity on the quantum level?
- jarroe
- · Replies 3 ·
Graduate Light Speed broadcast of message back to earth
- jarroe
- · Replies 6 ·
Graduate Does the Block Universe Theory Affect Our Understanding of Time and Reality?
- Chestermiller
- · Replies 95 ·
Graduate What is the Lorentz invariance of power?
- Heirot
- · Replies 12 ·
Graduate Boost Angular Momentum Vector: Interpreting the Result
- TriTertButoxy
- · Replies 1 ·
Graduate Derivation of Velocity-Addition Formula
- Trifis
- · Replies 10 ·
Graduate Are principal curvatures equal?
- Thinkor
- · Replies 1 ·
Graduate Tensor differentiation. Help with a step.
- Sagar_C
- · Replies 4 ·
Graduate Hyperbolic relations in deriving Lorentz transformations
- rethipher
- · Replies 17 ·
Graduate Fuel per unit distance decreasing?
- RobinSky
- · Replies 8 ·
Graduate Electromagnetic Field Tensor in Curvilinear Coordinates
- ngkamsengpeter
- · Replies 22 ·
Graduate Four dimensional version of Gauss' law
- vin300
- · Replies 7 ·
Graduate Can a particle have a space-like four-velocity? If not why not?
- andrewkirk
- · Replies 16 ·
Undergrad Is Space and Time Really Continuous or Discrete?
- mijfin
- · Replies 34 ·
Graduate Transfer of momentum in relativistic collisions
- Ookke
- · Replies 6 ·
Graduate Transforming Four Velocities with the Lambda Matrix
- GarageDweller
- · Replies 2 ·
Graduate The meaning of Weyl curvature caused by gravitational waves
- timmdeeg
- · Replies 7 ·
Graduate Does mass increase proportionally to speed?
- jfraze
- · Replies 13 ·
Graduate Stress-Energy Tensor for Gravitational Field
- Alexrey
- · Replies 3 ·
Graduate Schutz vs. Hartle: Which Book Offers Better Explanations and Diagrams?
- GarageDweller
- · Replies 1 ·
Graduate Why does observers agree on the spacetime interval?
- center o bass
- · Replies 20 ·
Graduate Can a photon be a particle without mass?
- jfraze
- · Replies 13 ·
Graduate Computer plot of particle orbits around Kerr black holes
- Dick Taid
- · Replies 5 ·
Graduate Force Equilibrium in GR: Conceptualizing Intuition
- unchained1978
- · Replies 2 ·
Graduate Halflife of Particles at Different Speeds?
- LiteHacker
- · Replies 3 ·
Graduate How Do Gravitational Fields Affect Photon Energy Levels?
- MikeGomez
- · Replies 1 ·
Graduate Calculation of double dual of Riemann tensor
- shichao116
- · Replies 7 ·
Graduate Ultrarelativistic approximation
- mps
- · Replies 4 ·
Graduate Understanding Wave Direction in Michelson-Morley Interferometer
- ith
- · Replies 3 ·
Graduate Learn About Tetrads: Definition, Meaning & Problems Solved
- m4r35n357
- · Replies 40 ·
Undergrad Basic time dilation question do I really understand it?
- fisico30
- · Replies 13 ·
Graduate Why do we fall, according to GR?
- kweba
- · Replies 39 ·
Graduate The Lorentz transformation matrix properties
- Mesmerized
- · Replies 18 ·
Graduate Understanding Einstein's Special Relativity: A Brief Introduction
- Oliverb
- · Replies 10 ·
Graduate Maxwell Tensor Symmetries Problem - Federico
- Federico
- · Replies 6 ·
Undergrad Who is Moving in Space? | Curious Student
- RobinSky
- · Replies 10 ·
Graduate GR Length Contraction & Shapiro Delay: Investigating Light Speed
- grav-universe
- · Replies 12 ·
Graduate Hypothetical scenario spacecracft moving faster than c
- Blogical
- · Replies 10 ·
Graduate Light from Spacecraft Moving Faster than c: Appearance
- Blogical
- · Replies 1 ·
Graduate Time Dilation Formula: Travel at Speed c = Infinite Time?
- moatasim23
- · Replies 12 ·
Graduate Typical rotation speed of a black hole?
- Warp
- · Replies 7 ·
Graduate A thought experiment on gravitation
- physio
- · Replies 2 ·
Graduate Can a jetpack help you escape from a black hole?
- Geishass
- · Replies 22 ·
Graduate Coordinates in GR: An Introduction & Question
- someGorilla
- · Replies 4 ·
Graduate Question about gravity waves energy and momentum
- ckent1959
- · Replies 9 ·
Undergrad Length contraction or Lorentz Contraction
- thecow99
- · Replies 4 ·
Graduate Handshake on a Fast Train: Understanding Relativity
- BenHGuitar
- · Replies 1 ·
Graduate Free Falling Objects in GR: Initial Speed Matters
- majong
- · Replies 2 ·
Graduate Does gravity as a fictitious force do work? (GR's free-falling frame POV)?
- TrickyDicky
- · Replies 76 ·
Graduate Equivalence principle so important?
- fisico30
- · Replies 14 ·
Graduate What Aspect of GR Forbids Superluminal Motion?
- andrewkirk
- · Replies 2 ·
Graduate Length contraction of falling things
- jartsa
- · Replies 88 ·
Graduate Einstein's Theory of Time: Debunked by Speed and Light | Real-Life Example
- Kristupas
- · Replies 10 ·
Graduate Clock-experimental proof of special relativity
- rocket123456
- · Replies 50 ·
Undergrad Is speed of light relative to eather flow?
- schiz0ai
- · Replies 21 ·
Graduate Gravitational vs. electromagnetic waves
- soarce
- · Replies 25 ·
High School Time Travel Paradox Involving Couples
- davo-3000
- · Replies 18 ·
Graduate Relativity of length contraction
- coktail
- · Replies 13 ·
High School What Does the 'E' in E=mc² Really Represent: Total Energy or Mass Energy?
- karanbir
- · Replies 48 ·
Graduate Covariant Derivative and metric tensor
- GRstudent
- · Replies 14 ·
Graduate Tensorial Calculation and antisymmetric tensors
- vnikoofard
- · Replies 13 ·
Undergrad Gravitational field strength equals zero?
- pussimatti
- · Replies 7 ·
Graduate Gravitational Radiation in the Weak-Field Limit
- Alexrey
- · Replies 4 ·
Graduate Maxwells Equations being non-invariant with Galilean transformations
- Xyius
- · Replies 1 ·
High School Does Time Move Differently on the Space Shuttle?
- sam1967
- · Replies 16 ·
Graduate Seeing into the past through a mirror going fater than the speed of light.
- Pharrahnox
- · Replies 3 ·
Graduate Is Our Current Existence Already Predestined by Time Travel?
- DeepSpace9
- · Replies 9 ·
Graduate Coordinate transformations in GR, worked examples?
- m4r35n357
- · Replies 3 ·
Graduate The Proper Time in Lorentz Space: Is it Infinite for the Resting Twin?
- Nilupa
- · Replies 6 ·
Graduate CERN team claims measurement of neutrino speed >c
- turbo
- · Replies 798 ·
Graduate Does Relativity Cause Time Differences Between Two Synchronized Clocks in Space?
- Alvydas
- · Replies 19 ·
Graduate Integrating the metric in 3-D Spherical coordinates
- GRstudent
- · Replies 5 ·
Graduate Contravariant and covariant vectors transformations
- GRstudent
- · Replies 16 ·
Graduate Space time Curvature around the Earth
- GRstudent
- · Replies 16 ·
Graduate Bell Spaceship Paradox: A and B's Viewpoint
- mananvpanchal
- · Replies 16 ·
Graduate Is 'charged black hole' an oxymoron?
- Q-reeus
- · Replies 382 ·
Graduate How will a light beam appear to another light beam.?
- aditya23456
- · Replies 1 ·
Graduate Some intuitional questions about GR
- Kontilera
- · Replies 9 ·
Graduate Hilbert action according to robert wald
- naughtyeskimo
- · Replies 3 ·
Graduate Calculating Proper Time of "A" in Schwarzschild Geometry
- Nilupa
- · Replies 9 ·
Graduate My understanding of relativity - is this correct?
- Urkelli
- · Replies 5 ·