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 Constant Scalings of 4-Vectors" - Zweibach, 2nd Ed.
- AhmadKhaqan
- · Replies 6 ·
High School Deriving Lorentz Transformations with 3 Postulates
- Shirish
- · Replies 20 ·
High School Solving Doubts about Simultaneity Exp. in Special Relativity
- Shirish
- · Replies 13 ·
Undergrad Choice of signature important for superluminal 4-velocity? (Minkowski)
- PhDeezNutz
- · Replies 61 ·
Graduate Understanding Killing Vector Equation Notation
- John Greger
- · Replies 6 ·
Undergrad Null Spacetime Intervals and Quantum Superposition
- XilOnGlennSt
- · Replies 16 ·
Insights Is Pressure A Source Of Gravity?
- PeterDonis
- · Replies 27 ·
Undergrad Study After Schwarzschild Spacetime: What's Next?
- kent davidge
- · Replies 14 ·
Undergrad Gravitational time dilation using an accelerating light-clock
- jcap
- · Replies 15 ·
Undergrad Light-Cone & 4-Vector Properties
- Arman777
- · Replies 8 ·
Undergrad Spacetime Interval & Energy-Momentum 4Vec: Reconciling Hyperbolic Geometry
- MattGeo
- · Replies 21 ·
Graduate Can R. Mallett's Device Overcome Energy Challenges for Time Travel?
- Marilyn67
- · Replies 5 ·
High School How Many Reference Frames Can Be Coincident at the Origin?
- Lynch101
- · Replies 24 ·
Graduate Understanding how to derive the stress-energy tensor formula
- JD_PM
- · Replies 9 ·
Undergrad Testing Gravitomagnetic Effect: Max Practical Results
- olgerm
- · Replies 21 ·
High School The Missing Mass of a reaction
- etotheipi
- · Replies 1 ·
High School Unlearning the Block Universe: How Relativity Challenges Our Perception of Time
- Lynch101
- · Replies 90 ·
Undergrad Mass distribution behavior of the singularities during black hole mergers
- DarkMattrHole
- · Replies 37 ·
Undergrad Interactive Spacetime Diagrams: Get Feedback on What I Built
- Nick-stg
- · Replies 13 ·
High School Rookie question about proper time
- etotheipi
- · Replies 20 ·
Undergrad Why Can't Objects Travel Faster Than Light?
- Jiyong Chung
- · Replies 18 ·
Undergrad How to Incorporate Metric Coefficients into Worldline Plots in Curved Spacetime?
- exmarine
- · Replies 7 ·
Undergrad What Are the Physical Properties of Human-Sized Worm Holes?
- Unbreakabletoon
- · Replies 5 ·
Undergrad Understanding Relation of Proper & Vector Quantities
- Arman777
- · Replies 23 ·
High School Gisin's ideas on time vs. special relativity—how does one reconcile them?
- Freixas
- · Replies 36 ·
Undergrad Relative Velocity of Particle ##p##: S vs S
- Apashanka
- · Replies 1 ·
Undergrad Lorentz boost -- speed or velocity?
- nomadreid
- · Replies 36 ·
Undergrad Addition of Cosmic Velocities: Expansion Equation & Horizons
- gerald V
- · Replies 13 ·
Undergrad Electromagnetic field according to relativity
- fog37
- · Replies 51 ·
High School Is E=mc² the Formula for the Speed of Light?
- TaurusSteve
- · Replies 17 ·
Undergrad Does direct interparticle action imply advanced inertial forces?
- jcap
- · Replies 1 ·
High School Is there a thought experiment to show that the speed of light is constant?
- somega
- · Replies 17 ·
High School Space + time = space time? then....
- HEXiT
- · Replies 9 ·
High School Time Travel Equation for Case B
- Shubh Goel
- · Replies 15 ·
High School Time & Speed of Light: Not a Universal Constant
- Shubh Goel
- · Replies 2 ·
Undergrad Understand Spacetime Diagrams: Calculating Proper Time
- Arman777
- · Replies 20 ·
Undergrad Find Einstein's Field Equation - Intuition with Strong Equivalence Principle
- hugo_faurand
- · Replies 13 ·
Undergrad Touch & Relativity: What Does It Mean?
- Johnny5454
- · Replies 2 ·
Graduate Understand Linear Perturbations to Stationary Black Holes
- Replusz
- · Replies 8 ·
Undergrad Length Perception & Spacetime Warp: Is it Warped?
- Uchida
- · Replies 7 ·
Undergrad Mathematical Truth of Physically Observable Quantities
- Replusz
- · Replies 13 ·
Undergrad Proof that two timelike vectors cannot be orthogonal
- Arman777
- · Replies 9 ·
Undergrad Four-Velocity: Geometric Definition
- Arman777
- · Replies 17 ·
Undergrad Affine Space: Understanding the Difference from Ordinary Space
- Arman777
- · Replies 13 ·
High School Learn Special Relativity: Understanding Graphs for X-T System
- jaumzaum
- · Replies 13 ·
High School Interpreting Lorentz Transformation Rotations
- David Lewis
- · Replies 4 ·
Undergrad Trying To Calculate Christoffel Symbols
- cgreeleybsu
- · Replies 16 ·
Undergrad Find Experimental Results for Physics Project
- cgreeleybsu
- · Replies 2 ·
High School Bending of Spacetime: Time Delay?
- TheoEndre
- · Replies 14 ·
Undergrad The magnitude of a four velocity
- Arman777
- · Replies 12 ·
Graduate What is the significance of the TL interval square measurement in relativity?
- LCSphysicist
- · Replies 11 ·
High School 2 objects at 0.6c in opposite directions. Can outrun light?
- DirkMan
- · Replies 11 ·
Insights Slowly Lowering an Object in a Static, Spherically Symmetric Spacetime
- PeterDonis
- · Replies 0 ·
High School Particle with negative mass inside a black hole horizon
- timmdeeg
- · Replies 25 ·
Graduate Metric Form of ##g_{μν}## - Solving a Challenge
- hykhor0601
- · Replies 13 ·
Undergrad Are Basics of Cosmology Difficult to Grasp?
- kent davidge
- · Replies 5 ·
Graduate Stats on Students Understanding Theory of Relativity
- PainterGuy
- · Replies 4 ·
High School Relativity & Computer Calculations: Speed Up 300x?
- danielhaish
- · Replies 15 ·
Undergrad How Elastic is Space (Spacetime)? | LIGO & Gravitational Waves
- bland
- · Replies 7 ·
High School Length Contraction Thought Experiment: Spot Mistake/Wrong Assumption
- galm_2727
- · Replies 4 ·
High School Gravity & Dark Energy: Newton, Einstein & Beyond
- Dennis Plews
- · Replies 5 ·
Undergrad What does E(nergy) = m(ass) (times c^2) mean?
- sayetsu
- · Replies 3 ·
Undergrad Area & Volume Naming Conventions: 4 Questions
- Robert Friz
- · Replies 8 ·
Undergrad Penrose Singularity: Trapped & Anti-Trapped Surfaces Explained
- windy miller
- · Replies 3 ·
Graduate LT & Translation Symmetry: Problem Analysis
- HaoBoJiang
- · Replies 4 ·
Undergrad Four-Vector in Spacetime: Invariance Across All Reference Frames?
- sophiatev
- · Replies 7 ·
Undergrad Using AI for Gravitational Wave Generation
- kelly0303
- · Replies 3 ·
Undergrad Frame Dragging Around Spinning Black Holes: Implications
- Robert Friz
- · Replies 7 ·
Undergrad Is the Sagnac Effect a Relativistic Phenomenon?
- Hepper
- · Replies 5 ·
Graduate Transformation law of the energy momentum tensor
- filip97
- · Replies 9 ·
High School Measurement of an unknown velocity vector of a closed space
- WalT888
- · Replies 1 ·
High School Is the current definition of gravity accurate?
- Antony Death
- · Replies 14 ·
Undergrad Who Will Win the Race at the Event Horizon?
- arkantos
- · Replies 12 ·
Undergrad An event being in the past of a timelike separated one
- sophiatev
- · Replies 20 ·
High School Expanding Universe: How Does It Conserve Energy?
- sqljunkey
- · Replies 21 ·
Undergrad Invariance of Diff. Line Elems. in Hartle's Gravity: Intro to GR
- sophiatev
- · Replies 11 ·
High School Accurate measurement of the speed of light
- TonyYuan
- · Replies 10 ·
High School Who will win this running race?
- TonyYuan
- · Replies 29 ·
High School What is the speed of a photon traveling along the sine function?
- somega
- · Replies 13 ·
Undergrad Exact historical explanation of deducing speed of light constancy
- roineust
- · Replies 48 ·
High School A thought Experiment in Time Dilation
- just dave
- · Replies 31 ·
High School Mass, Energy, and Space-Time: How Do They Interact?
- sqljunkey
- · Replies 8 ·
High School Question about speed connection
- danielhaish
- · Replies 4 ·
Undergrad Relativistic Work-Energy Theorem: Deriving Griffiths' Formula
- ArtVandolay
- · Replies 2 ·
Undergrad How Do You Derive the Distance Formula for a Hyperbola?
- Adwit
- · Replies 29 ·
Undergrad Gravitational time dilatation and curved spacetime - follow up
- cianfa72
- · Replies 58 ·
Undergrad Parallel Transport & Geodesics: Explained
- RohanJ
- · Replies 9 ·
Undergrad Why do clocks show proper time?
- George Keeling
- · Replies 27 ·
Undergrad Can We Confine Energy to Create Microscopic Black Holes?
- Frank Schroer
- · Replies 2 ·
Graduate Proving Free-Fall in Rindler Spacetime is Finite
- Antarres
- · Replies 5 ·
Undergrad Will anti-parallel light beams between two stars stay parallel?
- KurtLudwig
- · Replies 18 ·
High School Synchronization free of Contradiction: 1905 Paper
- bahamagreen
- · Replies 23 ·
Graduate Can large Black Holes ever spaghettify? (and more)
- .Scott
- · Replies 25 ·
Undergrad Cosmology: Inertial Reference Frames & Misconceptions
- Arman777
- · Replies 2 ·
Graduate Second Order Metric: Manipulating & Calculations for Einstein Equations
- Vrbic
- · Replies 2 ·
Undergrad Measuring One-Way Anisotropy of Light Speed
- seb7
- · Replies 2 ·
High School Falling Clock & Black Hole: Measure Time or Disappear?
- Omega0
- · Replies 21 ·
High School Velocity Addition: Unraveling the Mystery
- DaveC426913
- · Replies 14 ·
Undergrad Speed of Light in Vacuum in Non-Inertial Frame
- cianfa72
- · Replies 15 ·
Undergrad What is the meaning of constant speed of light?
- thaiqi
- · Replies 83 ·