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
Undergrad Possible Warp Drive Physics: The Alcubierre Drive
- swampwiz
- · Replies 7 ·
Undergrad Relativistic addition question
- rajeshmarndi
- · Replies 31 ·
Graduate Solving Almheriri's Dilaton-Gravity Model in AdS##_2##
- Fgard
- · Replies 2 ·
Graduate Reference for Oppenheimer Snyder Collapse Paper
- gnnmartin
- · Replies 3 ·
Insights Rindler Motion in Special Relativity, Part 2: Rindler Coordinates - Comments
- stevendaryl
- · Replies 27 ·
Undergrad Nonlinear relation between coordinate time and proper time
- craigthone
- · Replies 45 ·
Graduate Solve GHY Boundary Term Problem for Calculations
- Zitter
- · Replies 4 ·
Undergrad Finding tangent space basis vectors for a sphere in R³
- kent davidge
- · Replies 18 ·
High School What is Lorentz symmetry and how does it differ from cubic symmetry?
- TheQuestionGuy14
- · Replies 4 ·
Undergrad Origin of Deformation Energy in Curved Spacetime?
- timmdeeg
- · Replies 9 ·
Undergrad Solving Boundary Conditions in 4D Spacetime Volume
- BookWei
- · Replies 2 ·
Undergrad Components of Riemann Tensor: 4 Indexes, 16x16 Matrix
- Z3kr0m
- · Replies 4 ·
High School Is Spacetime a Discrete Lattice? - Prof. Sila Beane's Experiment
- TheQuestionGuy14
- · Replies 2 ·
High School Why does ET1 in the moving spaceship show faster time than the Earth timers?
- Ross Arden
- · Replies 33 ·
Undergrad If Earth orbited between two identical suns, would the distances be equal?
- Raul Moretti
- · Replies 2 ·
High School Does Relativistic Mass Affect the Way We Weigh Things?
- MarkSK
- · Replies 5 ·
Undergrad Calculating the Ricci tensor on the surface of a 3D sphere
- Z3kr0m
- · Replies 12 ·
Undergrad GR: Does Clock Hypothesis Apply?
- Sorcerer
- · Replies 8 ·
Undergrad Measuring Magnetic Field in Rotating Frame
- Xynon
- · Replies 3 ·
Undergrad Meter stick slides over a meter wide hole at a high speed
- Hiero
- · Replies 48 ·
Undergrad Why use the Palatini action instead of Einstein's field equations
- ohwilleke
- · Replies 2 ·
Undergrad Does bent light travel further than undeflected light?
- tma73
- · Replies 6 ·
Undergrad Can Momentum Exist Without Net Velocity in Special Relativity?
- Andy Bloch
- · Replies 10 ·
High School Distribution and direction of Unruh radiation
- GeorgeDishman
- · Replies 8 ·
Undergrad Conditions for Spherically Symmetric Black Hole Solution
- PeteSampras
- · Replies 1 ·
High School Understanding Proper Time vs. Layman's Time
- p1l0t
- · Replies 22 ·
Undergrad Is the difference between covariant and Lie derivatives of vector fields valid?
- kent davidge
- · Replies 2 ·
Undergrad What happens visually when an incompressible sphere reaches its Schwarzschild radius?
- Glurth
- · Replies 15 ·
Undergrad Why does time slow down as speed approaches the speed of light?
- Passionate Eng
- · Replies 10 ·
High School Is it Possible to Know Which Object is Moving? Special Theory of Relativity
- Jan Nebec
- · Replies 9 ·
Undergrad Max Amplitude Gravitational Waves: 2?
- James Essig
- · Replies 4 ·
High School Experiments to Measure Speed of Light
- Sandeep T S
- · Replies 7 ·
High School Why we don't have several theories
- kent davidge
- · Replies 7 ·
High School Relative motion and proper time
- Joao
- · Replies 4 ·
Undergrad Why do different observers see events in different order?
- physicsnoobie79
- · Replies 16 ·
Graduate Gravitational binding energy and the TOV limit
- itssilva
- · Replies 19 ·
Undergrad What is the gamma factor in a particle's rest frame?
- dyn
- · Replies 8 ·
High School What is the Bridge Fall Paradox and its implications for material stress?
- sweet springs
- · Replies 5 ·
High School Is Euclid's 5th Postulate Correct? - A Teacher's Perspective
- AGuglielmone
- · Replies 7 ·
High School Is there absolute motion in relativity theory?
- Ross Arden
- · Replies 7 ·
High School Where does energy come from to slow a pulsar's rotation in an accelerating spaceship?
- Ross Arden
- · Replies 5 ·
High School Light cone and Cherenkov radiation
- Ross Arden
- · Replies 13 ·
Undergrad Issues with the variation of Christoffel symbols
- JuanC97
- · Replies 10 ·
Undergrad Examples of invariant quantities
- BookWei
- · Replies 4 ·
Undergrad Are the physical principles inside a black hole different from ours?
- exponent137
- · Replies 10 ·
Graduate Does Lovelock's theorem supersede the equivalence principle in GR?
- bhobba
- · Replies 4 ·
Undergrad Is there any way to derive the time dilation formula?
- Prem1998
- · Replies 31 ·
Undergrad Riemann curvature tensor derivation
- cozycoz
- · Replies 4 ·
Graduate Is the GCRS an inertial or non-inertial reference frame?
- Matter_Matters
- · Replies 1 ·
Undergrad Deriving Covariant Form of $E_{1}E_{2}|\vec{v}|$
- bananabandana
- · Replies 3 ·
Undergrad Why doesn't a photon's mass increase to infinity?
- Francis Ward
- · Replies 64 ·
Undergrad How do non-inertial frames affect special relativity?
- kent davidge
- · Replies 41 ·
Undergrad Geometric Meaning of Complex Null Vector in Newman-Penrose Formalism
- RiccardoVen
- · Replies 2 ·
Graduate Hawking radiation and rotating Black holes
- Hiranya Pasan
- · Replies 15 ·
Graduate Can you travel faster than light relative to Earth in relativity?
- mccraggen
- · Replies 8 ·
High School Why don't we feel Earth's acceleration in its orbit?
- Android17
- · Replies 13 ·
High School Why does the rubber sheet analogy for gravity have those two problems?
- Android17
- · Replies 8 ·
High School Is Mass Truly Relative or Absolute?
- Mr_Quantum
- · Replies 5 ·
High School FTL train + FTL communication thought experiment
- girts
- · Replies 44 ·
High School Constancy of the speed of light
- dayalanand roy
- · Replies 83 ·
Graduate Gravitational Waves: Expansion of Spacetime?
- alantheastronomer
- · Replies 6 ·
Graduate Compute Normal Forces on Box Sides via Stress-Energy Tensor
- pervect
- · Replies 3 ·
Undergrad Can Newton's Theory Apply in a Small Volume?
- kent davidge
- · Replies 8 ·
High School How are tensors and Lorentz transformations related?
- geordief
- · Replies 1 ·
Undergrad A moving rod; two Lorentz boosts compared with one
- Hiero
- · Replies 35 ·
Undergrad Charged Particles Radiating in "Free Fall" into Black Holes
- sha1000
- · Replies 2 ·
Undergrad Rotating Black Hole w/ Ring: Spacetime Effects
- A Puzzlement
- · Replies 7 ·
Graduate When does the Minkowski metric get non-zero off-diagonals?
- DuckAmuck
- · Replies 15 ·
Undergrad The metrics to describe a wormhole
- sergiokapone
- · Replies 37 ·
Undergrad Spacetime is homogeneous and isotropic
- BookWei
- · Replies 6 ·
Undergrad The relativistic de Broglie equation
- mjda
- · Replies 11 ·
Undergrad Why does bent space set objects in motion?
- Rtenhoor
- · Replies 24 ·
High School Theoretical Question On The Twins Paradox and Heart Rate
- Orangeator
- · Replies 34 ·
Undergrad Expressing Locality in Vector Space for GR
- kent davidge
- · Replies 4 ·
Undergrad Are basis vectors the canonical basis in all coordinate systems?
- kent davidge
- · Replies 8 ·
Undergrad Why does centripetal acceleration break down at r = 0 for rotating singularities?
- Atticuskirk
- · Replies 5 ·
Undergrad Why are Lie algebras useful in studying symmetry groups in relativity?
- kent davidge
- · Replies 10 ·
High School Time dilation formula for a ship traveling at relativistic speed
- Megatronlol
- · Replies 7 ·
Undergrad What is the difference between covariance and invariance in special relativity?
- mjda
- · Replies 1 ·
Graduate Born-rigid spaceship acceleration with front vs rear rocket motors
- pervect
- · Replies 14 ·
Undergrad Modeling Simple N-body in Hypothetical Relativistic Dark Flow w/ Netlogo
- nearc
- · Replies 4 ·
High School How does spacetime curvature affect a long rigid object near a planet?
- Mr_Phil_Osophy
- · Replies 16 ·
Undergrad Did the big bang singularity not have a history?
- consuli
- · Replies 8 ·
Undergrad Time dilation vs the Equivalence principle
- Prometeus
- · Replies 32 ·
High School Exiting Wormhole Prematurely: Where Does Your Ship End Up?
- Gondur
- · Replies 4 ·
High School Is Gravity a Fundamental Force or an Emergent Effect?
- nytmr24
- · Replies 5 ·
Undergrad A paradox connected to General Relativity
- puppypower
- · Replies 10 ·
Undergrad Accuracy of Relativity vs Quantum Mechanics Measurement
- windy miller
- · Replies 3 ·
High School Does relativistic mass increase affect gravitational mass?
- Jan Nebec
- · Replies 15 ·
Undergrad Tangible example of relativity of simultaneity
- Philip Dhingra
- · Replies 13 ·
Undergrad A minus sign in the gravitational potential
- MathematicalPhysicist
- · Replies 8 ·
High School Understanding Orbital Geodesics in General Relativity
- Ziang
- · Replies 22 ·
Undergrad Del with Superscript in Carroll's Equation
- Pencilvester
- · Replies 2 ·
Undergrad Do homeomorphic manifolds always have the same number of geodesics between point pairs?
- Pencilvester
- · Replies 17 ·
Undergrad Consequences of a Schwarzschild metric without length contraction
- laudprim
- · Replies 13 ·
Undergrad Interesting Derivation of Maxwell's Equations
- bhobba
- · Replies 11 ·
Undergrad Can we deal with relativistic mass once and for all?
- Jan Nebec
- · Replies 143 ·
Graduate Usefulness of relativistic mass
- vanhees71
- · Replies 65 ·
High School Why does resistance to acceleration depend on velocity and force direction?
- Jan Nebec
- · Replies 8 ·
Insights What is relativistic mass and why it is not used much? - Comments
- Orodruin
- · Replies 58 ·