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 A Question on Relativistic Mass (SR)
- ASmc2
- · Replies 2 ·
Graduate Does the bending of light by gravity imply that photons have mass?
- Allojubrious
- · Replies 3 ·
Graduate Gauss-Bonnet term extrinsic curvature
- sourena
- · Replies 4 ·
Graduate Relativistic Coulomb potential - how to understand the equation
- James MC
- · Replies 9 ·
Graduate Solving Einstein Notation: Summing Subscripts and Superscripts
- andrewkirk
- · Replies 2 ·
Graduate I don't understand the nature of gravity
- studentxlol
- · Replies 10 ·
Graduate Are isotropic observers always at rest in surfaces of homogeneity?
- eoghan
- · Replies 16 ·
Graduate Why are there different forms of the Einstein field equations?
- Allojubrious
- · Replies 7 ·
Graduate Linearity of Maxwell's equations as a result of special relativity.
- Snicker
- · Replies 31 ·
Graduate General relativity for a master degree?
- alialice
- · Replies 2 ·
Graduate Converting mass entirely into energy
- g.lemaitre
- · Replies 4 ·
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 ·