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 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 Understanding Time in a Moving Frame: Observer's Experiment with Egg Timers
- Ross Arden
- · Replies 33 ·
Undergrad Earth Between 2 Suns: Time & Space Questions
- 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 Benefits & Disadvantages of Palatini Action for General Relativity
- ohwilleke
- · Replies 2 ·
Undergrad Speed of light around a (massive) object in space ...(i.e.sun
- 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 Comparing Lie & Covariant Derivatives of Vector Fields
- kent davidge
- · Replies 2 ·
Undergrad Transition from Normal Matter to Black Hole: Thought Experiment
- Glurth
- · Replies 15 ·
Undergrad Measuring Speed of Light: Reference Guide
- 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 No Universal Chronological Order of Events? Explained
- 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 What is the theory of relativity?
- Ross Arden
- · Replies 7 ·
High School Pulsar Clock: The Mystery of Slowing Rotation in a 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 Universe Inside Black Hole: Principles Different?
- exponent137
- · Replies 10 ·
Graduate Physical Basis of Lovelock's Theorem: GR & Equivalence Principle
- 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 Explaining the Geocentric Celestial Reference System
- 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 Space Travel & Relativity: Is it Possible?
- mccraggen
- · Replies 8 ·
High School Acceleration: Effects on Matter & Observers
- Android17
- · Replies 13 ·
High School Einstein's Gravity Model: Explaining Its Creation
- 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 Tensors & Lorentz Transform: Is There a Connection?
- 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 Basis Vectors & Inner Product: A No-Nonsense Introduction
- kent davidge
- · Replies 8 ·
Undergrad Radial Acceleration of Rotating Singularities: Planck Length & Beyond
- Atticuskirk
- · Replies 5 ·
Undergrad Lie Algebras & Relativity: Usefulness & Purpose
- kent davidge
- · Replies 10 ·
High School Time Dilation: "Did I Use Formula Correctly?
- Megatronlol
- · Replies 7 ·
Undergrad What is the difference between covariance and invariance in special relativity?
- mjda
- · Replies 1 ·
Graduate Rocket Motor Placement SR: Effects on Spaceship Acceleration
- pervect
- · Replies 14 ·
Undergrad Modeling Simple N-body in Hypothetical Relativistic Dark Flow w/ Netlogo
- nearc
- · Replies 4 ·
High School Object interactions in relation to space curvature....
- 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 Gravitational Mass & Velocity: Is There a Correlation?
- 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 Number of Geodesics Between Two Points: Topology vs. Homeomorphism
- Pencilvester
- · Replies 17 ·
Undergrad Modified Schwarzschild Metric: Length Contraction Consequences
- 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 Understanding Resistance of Acceleration: Velocity & Force
- Jan Nebec
- · Replies 8 ·
Insights What is relativistic mass and why it is not used much? - Comments
- Orodruin
- · Replies 58 ·
High School Flat spacetime in a gravity well
- DaveC426913
- · Replies 40 ·
Undergrad Geodesic Maximality: Answers to Relativists' Questions
- Umaxo
- · Replies 2 ·
High School Distance Expansion When Moving Away from an Object?
- Karagoz
- · Replies 4 ·
High School How can the speed of light be constant for all observers?
- Karagoz
- · Replies 15 ·
Undergrad Does Rest Mass Change if c Varies?
- jocarren
- · Replies 4 ·
High School LIGO Observation of Gravitational Waves: Questions Answered
- Andrew Washington
- · Replies 7 ·
High School Speed of Light: Does It Change?
- Lunct
- · Replies 3 ·
Graduate Math of Reference Frames: Spanning Vector Space
- kent davidge
- · Replies 2 ·
Undergrad Simultaneity: Train and Lightning Thought Experiment
- taenyfan
- · Replies 136 ·
High School Length contraction applet - have they got it wrong?
- FranzDiCoccio
- · Replies 25 ·
High School What speed and direction are we actually traveling?
- Amazingly Andrew
- · Replies 60 ·