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 Measuring Observables in 3+1 Formalism
- tendor
- · Replies 6 ·
Graduate Kinetic energy conservation in matter/energy transform
- Ookke
- · Replies 15 ·
Graduate General Relativity vs. quantum gravity
- soothsayer
- · Replies 13 ·
Graduate Is the Lorentz factor the derivative of measured time relative to proper time?
- Vorde
- · Replies 15 ·
Graduate Vectors/Tensors-spherical coordinates. z component of force of fluid on a sphere
- racnna
- · Replies 8 ·
Graduate Do we use covariant derivatives for four velocity in GR?
- GarageDweller
- · Replies 16 ·
Graduate Can the magnetic field from a single charge be converted into an electric field?
- Trifis
- · Replies 29 ·
Graduate Why Does Heart Slow as Near Light Speed?
- multige
- · Replies 8 ·
Graduate Relativistic time dilation and thermodynamics
- qbit
- · Replies 16 ·
Graduate Thought experiment on Simultaneity
- kannank
- · Replies 29 ·
Graduate How to get components of Riemann by measuring geodesic deviation?
- shichao116
- · Replies 9 ·
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 Would time dilation exist in a simulated universe based on Einstein's relativity?
- billa12
- · Replies 6 ·
Graduate What would tachyons see in their own frame?
- 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 Why is the speed of light squared in E=mc²?
- 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 Block universe interpretation with continuous object versions
- 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 Deriving equation 34 from equation 32 using covariant derivatives
- 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 What are tetrads used for in general relativity?
- 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 Does redshift measure relative or absolute velocity?
- Oliverb
- · Replies 10 ·
Graduate Maxwell Tensor Symmetries Problem - Federico
- Federico
- · Replies 6 ·
Undergrad How can you tell who is really moving between two observers in space?
- 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 Why does time dilation approach infinity as speed approaches c?
- 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 you escape a black hole with sustained jet propulsion?
- Geishass
- · Replies 22 ·
Graduate Why do coordinate descriptions mislead about GR spacetime?
- someGorilla
- · Replies 4 ·
Graduate Where do gravitational waves appear in the Einstein field equations?
- 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 Does time actually slow down at high speeds, or is it just light lag?
- 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 Does E=mc² include kinetic and potential 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 ·