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 Solving Confusion About Black Holes, Schwarzschild Radius & Time Dilation
- arkantos
- · Replies 3 ·
Undergrad What are the Relativistic versions of Jefimenko's equations?
- tade
- · Replies 2 ·
Undergrad Solving Geodesic Eq.: Mysterious Conservation Eq. (Sec. 5.4 Carroll)
- George Keeling
- · Replies 4 ·
Undergrad What are the many null-infinities in Minkowskian space?
- Pnin
- · Replies 4 ·
Undergrad Understanding Killing Vectors & Schwarzschild Geodesics
- George Keeling
- · Replies 1 ·
Graduate Understanding Christoffel symbol in GR context
- JD_PM
- · Replies 19 ·
Graduate Non-metric Compatible Connections: Physically Plausible?
- Ibix
- · Replies 9 ·
High School Einstein-Poincare Clock Synchronization Convention
- PainterGuy
- · Replies 21 ·
High School Scale of Measurement vs Equipment Sensitivity: Does Symmetry Always Hold?
- roineust
- · Replies 4 ·
Undergrad Question on the energy needed to go at a relativistic speed
- John SpaceY
- · Replies 30 ·
Undergrad Did Einstein Formulate an Aberration of Light Using Tangents?
- Clovis
- · Replies 7 ·
Undergrad Strongest Evidence for Trapping Light in Schwarzschild Radius
- greswd
- · Replies 6 ·
Graduate Orthogonal spacelike and timelike vectors and inertial frames
- JD_PM
- · Replies 22 ·
Graduate Is 'Local Flatness' the Right Term for Describing Spacetime?
- Orodruin
- · Replies 99 ·
Undergrad Big Bang Theory: Spacetime or Matter First?
- omie
- · Replies 1 ·
High School Constant speed between 2 objects close to the speed of light
- roineust
- · Replies 22 ·
Undergrad Is the Scale Difference Between E=pc and v=E/p Explained by Special Relativity?
- JohnH
- · Replies 15 ·
Undergrad Comparing Planck's Mass, Length, Time and Energy
- George Keeling
- · Replies 5 ·
Undergrad How can Lorentz transforms be inverted?
- john t
- · Replies 13 ·
High School Energy, Mass, Speed of Light: Can We Reach It?
- LawH
- · Replies 9 ·
Undergrad How is the 4-Dimensional Element Volume Used in Quantum Physics and Relativity?
- dsaun777
- · Replies 14 ·
Undergrad Why is the speed of light absolute?
- Ad VanderVen
- · Replies 44 ·
High School Time dilation, relativistic mass and fuel consumption
- PainterGuy
- · Replies 101 ·
High School Tensor Contraction with Metric for Stress Energy: Explained
- dsaun777
- · Replies 20 ·
Undergrad History of E=mc^2 Before Einstein
- Demystifier
- · Replies 28 ·
Undergrad Do We Need ESC in Earth's Atmosphere?
- Bob Enyart
- · Replies 12 ·
High School Meaning of "Speed of Light is Constant": Explained
- roineust
- · Replies 12 ·
Undergrad Does Conservation of Momentum & Energy Hold in the C.O.M. Reference Frame?
- ruivocanadense
- · Replies 4 ·
Undergrad Where is Contraction Point in Special Relativity?
- MrBlank
- · Replies 16 ·
Undergrad Lewis H Ryder: Cartesian to Polar Coord Transformations
- Ayoub Tamin
- · Replies 2 ·
Undergrad Accelerating Body Creates Space-Time Curvature?
- DarkMattrHole
- · Replies 4 ·
Undergrad Quadrupole Moment Time Variation: Does Coordinate Choice Matter?
- AdirianSoan
- · Replies 22 ·
Graduate Lorentz Transformation Derivation Question
- jk22
- · Replies 9 ·
Undergrad Inertial frames in changing gravitational fields
- Staticboson
- · Replies 66 ·
High School Moving Faster Than Light: Are There Symmetrical Rules?
- roineust
- · Replies 4 ·
Undergrad Is the inertia of a massive object the result of gravity wave generation?
- DarkMattrHole
- · Replies 8 ·
High School What Conditions Allow for the Formation and Detection of Einstein-Rosen Bridges?
- wengler
- · Replies 1 ·
Graduate Time Measurement in Friedman Metric: Physically Possible?
- exmarine
- · Replies 5 ·
Graduate Hawking Radiation: Understanding Complexity in Black Holes
- hideelo
- · Replies 7 ·
High School Does Black Hole Gravity Cause a Blueshift in Approaching Light?
- Revolucien
- · Replies 39 ·
Graduate Magnitude 4-Vector Lorenz Gauge: Klein-Gordon Eq.
- Thomas Rigby
- · Replies 2 ·
High School Do Photons Experience Time When Traveling at Light Speed?
- Cato
- · Replies 35 ·
Undergrad Special Relativity & No Special Inertial Frame of Reference
- manulal
- · Replies 12 ·
Undergrad Gravity at the Event Horizon of a Black Hole
- RobertsMrtn
- · Replies 6 ·
Undergrad Trace of the stress energy tensor
- dsaun777
- · Replies 6 ·
Undergrad Everyone Measures Light in a Vacuum at the Same Speed
- BrandonInFlorida
- · Replies 8 ·
Undergrad Electromagnetic Radiation in Strong Gravity Field
- tmhen
- · Replies 1 ·
Undergrad Microsoft Mathematics: Calculate EM Energy Momentum Tensor
- George Keeling
- · Replies 1 ·
Undergrad Equivalence Principle: Locally Flat Spacetimes Explained
- WWCY
- · Replies 6 ·
Undergrad Covariant Derivative: Limits on Making a Tensor?
- dsaun777
- · Replies 2 ·
Undergrad What is the Constant Speed of Movement through Spacetime?
- RahSuh
- · Replies 29 ·
Undergrad Gravity: What Moves a Stationary Body?
- woolyhead77
- · Replies 37 ·
Undergrad Is Zero Curvature Space Equivalent to Flat Space in General Relativity?
- Jianbing_Shao
- · Replies 35 ·
Graduate Lorentz Invariance of Lagrangian: Proof & Explanation
- Gaussian97
- · Replies 4 ·
High School Why Shouldn't I Be Skeptical About SR Postulate No.1?
- roineust
- · Replies 15 ·
Undergrad Can Gravity Escape a Black Hole? | GR Learning
- Mahesh
- · Replies 8 ·
Undergrad Lorentz Arguments for Ether: Critical Analysis of 1895 Paper
- Lincon Ribeiro
- · Replies 3 ·
High School Observer Moving at c: Does it Contradict Limits?
- jk22
- · Replies 11 ·
High School The precession of Mercury's orbit
- PainterGuy
- · Replies 5 ·
Graduate Variation of Metric Tensor Under Coord Transf | 65 chars
- QipshaqUli
- · Replies 1 ·
High School Redshift & Energy Conservation: Questions Answered
- Jimmy87
- · Replies 14 ·
Undergrad Energy Component 0 of 4 Momentum Vector P
- kent davidge
- · Replies 10 ·
Undergrad Special Relativity: Constant Speeds or More Complex GRT?
- kent davidge
- · Replies 4 ·
Undergrad Special Relativity vs Lorentz Transformation: Difference Explained
- BadgerBadger92
- · Replies 11 ·
Undergrad Is the four current in Relativity an invariant quantity?
- dsaun777
- · Replies 16 ·
Undergrad Sending Signal from Planet Near Gargantua: A Thought Experiment
- kccrossen
- · Replies 3 ·
High School Is Any Material Truly Incompressible Under Special Relativity?
- YoungPhysicist
- · Replies 16 ·
High School Time & Special Relativity: Is Time Object-Specific?
- LeeHilliard
- · Replies 18 ·
Graduate Validity of theoretical arguments for Unruh and Hawking radiation
- Elias1960
- · Replies 146 ·
Undergrad Transformation of the contravariant and covariant components of a tensor
- shinobi20
- · Replies 23 ·
Undergrad A shot in the dark -- Need help understanding Special Relativity
- Taktix
- · Replies 3 ·
Undergrad Ligo Heat Dissipation: How Do They Protect Mirrors?
- kelly0303
- · Replies 3 ·
Undergrad One Way Speed of Light: Is it Constant?
- CompSci
- · Replies 8 ·
Undergrad Struggling with a special relativity "paradox"
- KipIngram
- · Replies 47 ·
Graduate Parallel transport of a 1-form aound a closed loop
- Phinrich
- · Replies 8 ·
Graduate Christoffel Symbols in terms of a Change in Basis
- Phinrich
- · Replies 19 ·
Undergrad Electric Field Directly Ahead of or Behind a Moving Charge
- shinobi20
- · Replies 34 ·
High School Calculating Triangle Area in Relativity Theory
- LagrangeEuler
- · Replies 13 ·
Undergrad Ricci Tensor: Covariant Derivative & Its Significance
- dsaun777
- · Replies 6 ·
High School Time in Cartesian Coordinate Systems: Math Q&A
- BadgerBadger92
- · Replies 15 ·
Graduate Schwarzschild Metric Geodesic Eq: Qs & Answers
- exmarine
- · Replies 15 ·
High School Reaching the Speed of Light: A Thought Experiment on Halving Distance Traveled
- ShaunM
- · Replies 64 ·
Undergrad Explanation of Galilean transformations
- penroseandpaper
- · Replies 2 ·
High School What path does matter take after entering a black hole?
- MikeeMiracle
- · Replies 98 ·
Graduate Kinnersley’s “photon rocket” and gravitational radiation
- Povel
- · Replies 14 ·
High School Does Godel's Rotating Universe Theory Suggest Time Repeats Itself?
- BadgerBadger92
- · Replies 11 ·
Graduate Weyl transformation of connection and curvature tensors
- Rabindranath
- · Replies 4 ·
Undergrad Why does Special Theory of Relativity leave out Potential Energy?
- Saptarshi Sarkar
- · Replies 5 ·
Undergrad Gravitational interaction between three bodies
- Ranku
- · Replies 4 ·
Undergrad An observer passing the event horizon of a black hole (Part 2)
- DennisN
- · Replies 29 ·
Graduate Why Does the Energy-Stress Tensor Exclude Other Forces?
- VictorMedvil
- · Replies 13 ·
High School Eddington's 1919 Eclipse: Photon Deviation & Redshift
- Gfellow
- · Replies 3 ·
Undergrad Event Horizon Gravity: Infinite or Not?
- Mike Holland
- · Replies 6 ·
Undergrad Can Time Dilation Probes Redefine Our Understanding of Space and Time?
- Engineer_pleb
- · Replies 14 ·
High School Interstellar Movie: Light Reflection on Planet Close to Event Horizon
- Benplace
- · Replies 14 ·
Graduate Detecting Gravitational Waves: Antenna Sensitivity & Weber Bars
- marcusl
- · Replies 10 ·
Undergrad What is the Invariant Mass of Two Perpendicular Photons?
- rashida564
- · Replies 9 ·
Undergrad Energy Density in SR Energy-Momentum Tensor
- George Keeling
- · Replies 12 ·
Undergrad Solve E = mc^2 & Time Dilation Equation
- samuel toco
- · Replies 3 ·
Undergrad Getting Used to Killing Vector Fields: Explained
- Wledig
- · Replies 7 ·