Special and General Relativity Forum

Post thread
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.
Undergrad Find Einstein's Field Equation - Intuition with Strong Equivalence Principle
  • · Replies 13 ·
Replies
13
Views
2K
Undergrad Touch & Relativity: What Does It Mean?
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Understand Linear Perturbations to Stationary Black Holes
  • · Replies 8 ·
Replies
8
Views
1K
Undergrad Length Perception & Spacetime Warp: Is it Warped?
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Mathematical Truth of Physically Observable Quantities
  • · Replies 13 ·
Replies
13
Views
1K
Undergrad Proof that two timelike vectors cannot be orthogonal
  • · Replies 9 ·
Replies
9
Views
3K
Undergrad Four-Velocity: Geometric Definition
  • · Replies 17 ·
Replies
17
Views
2K
Undergrad Affine Space: Understanding the Difference from Ordinary Space
  • · Replies 13 ·
Replies
13
Views
4K
High School Learn Special Relativity: Understanding Graphs for X-T System
  • · Replies 13 ·
Replies
13
Views
2K
High School Interpreting Lorentz Transformation Rotations
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Trying To Calculate Christoffel Symbols
  • · Replies 16 ·
Replies
16
Views
4K
Undergrad Find Experimental Results for Physics Project
  • · Replies 2 ·
Replies
2
Views
1K
High School Bending of Spacetime: Time Delay?
  • · Replies 14 ·
Replies
14
Views
2K
Undergrad The magnitude of a four velocity
  • · Replies 12 ·
Replies
12
Views
5K
Graduate What is the significance of the TL interval square measurement in relativity?
  • · Replies 11 ·
Replies
11
Views
1K
High School 2 objects at 0.6c in opposite directions. Can outrun light?
  • · Replies 11 ·
Replies
11
Views
4K
Insights Slowly Lowering an Object in a Static, Spherically Symmetric Spacetime
  • · Replies 0 ·
Replies
0
Views
3K
High School Particle with negative mass inside a black hole horizon
  • · Replies 25 ·
Replies
25
Views
3K
Graduate Metric Form of ##g_{μν}## - Solving a Challenge
  • · Replies 13 ·
Replies
13
Views
2K
Undergrad Are Basics of Cosmology Difficult to Grasp?
  • · Replies 5 ·
Replies
5
Views
1K
Graduate Stats on Students Understanding Theory of Relativity
  • · Replies 4 ·
Replies
4
Views
1K
High School Relativity & Computer Calculations: Speed Up 300x?
  • · Replies 15 ·
Replies
15
Views
2K
Undergrad How Elastic is Space (Spacetime)? | LIGO & Gravitational Waves
  • · Replies 7 ·
Replies
7
Views
2K
High School Length Contraction Thought Experiment: Spot Mistake/Wrong Assumption
  • · Replies 4 ·
Replies
4
Views
1K
High School Gravity & Dark Energy: Newton, Einstein & Beyond
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad What does E(nergy) = m(ass) (times c^2) mean?
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Area & Volume Naming Conventions: 4 Questions
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Penrose Singularity: Trapped & Anti-Trapped Surfaces Explained
  • · Replies 3 ·
Replies
3
Views
2K
Graduate LT & Translation Symmetry: Problem Analysis
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Four-Vector in Spacetime: Invariance Across All Reference Frames?
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Using AI for Gravitational Wave Generation
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Frame Dragging Around Spinning Black Holes: Implications
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Is the Sagnac Effect a Relativistic Phenomenon?
  • · Replies 5 ·
Replies
5
Views
10K
Graduate Transformation law of the energy momentum tensor
  • · Replies 9 ·
Replies
9
Views
4K
High School Measurement of an unknown velocity vector of a closed space
  • · Replies 1 ·
Replies
1
Views
1K
High School Is the current definition of gravity accurate?
  • · Replies 14 ·
Replies
14
Views
2K
Undergrad Who Will Win the Race at the Event Horizon?
  • · Replies 12 ·
Replies
12
Views
2K
Undergrad An event being in the past of a timelike separated one
  • · Replies 20 ·
Replies
20
Views
2K
High School Expanding Universe: How Does It Conserve Energy?
  • · Replies 21 ·
Replies
21
Views
2K
Undergrad Invariance of Diff. Line Elems. in Hartle's Gravity: Intro to GR
  • · Replies 11 ·
Replies
11
Views
2K
High School Accurate measurement of the speed of light
  • · Replies 10 ·
Replies
10
Views
2K
High School Who will win this running race?
  • · Replies 29 ·
Replies
29
Views
2K
High School What is the speed of a photon traveling along the sine function?
  • · Replies 13 ·
Replies
13
Views
2K
Undergrad Exact historical explanation of deducing speed of light constancy
  • · Replies 48 ·
2
Replies
48
Views
4K
High School A thought Experiment in Time Dilation
  • · Replies 31 ·
2
Replies
31
Views
3K
High School Mass, Energy, and Space-Time: How Do They Interact?
  • · Replies 8 ·
Replies
8
Views
2K
High School Question about speed connection
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Relativistic Work-Energy Theorem: Deriving Griffiths' Formula
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad How Do You Derive the Distance Formula for a Hyperbola?
  • · Replies 29 ·
Replies
29
Views
4K
Undergrad Gravitational time dilatation and curved spacetime - follow up
  • · Replies 58 ·
2
Replies
58
Views
5K
Undergrad Parallel Transport & Geodesics: Explained
  • · Replies 9 ·
Replies
9
Views
3K
Undergrad Why do clocks show proper time?
  • · Replies 27 ·
Replies
27
Views
3K
Undergrad Can We Confine Energy to Create Microscopic Black Holes?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Proving Free-Fall in Rindler Spacetime is Finite
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Will anti-parallel light beams between two stars stay parallel?
  • · Replies 18 ·
Replies
18
Views
2K
High School Synchronization free of Contradiction: 1905 Paper
  • · Replies 23 ·
Replies
23
Views
2K
Graduate Can large Black Holes ever spaghettify? (and more)
  • · Replies 25 ·
Replies
25
Views
5K
Undergrad Cosmology: Inertial Reference Frames & Misconceptions
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Second Order Metric: Manipulating & Calculations for Einstein Equations
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Measuring One-Way Anisotropy of Light Speed
  • · Replies 2 ·
Replies
2
Views
2K
High School Falling Clock & Black Hole: Measure Time or Disappear?
  • · Replies 21 ·
Replies
21
Views
2K
High School Velocity Addition: Unraveling the Mystery
  • · Replies 14 ·
Replies
14
Views
2K
Undergrad Speed of Light in Vacuum in Non-Inertial Frame
  • · Replies 15 ·
Replies
15
Views
2K
Undergrad What is the meaning of constant speed of light?
  • · Replies 83 ·
3
Replies
83
Views
7K
Undergrad Solving Confusion About Black Holes, Schwarzschild Radius & Time Dilation
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad What are the Relativistic versions of Jefimenko's equations?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Solving Geodesic Eq.: Mysterious Conservation Eq. (Sec. 5.4 Carroll)
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad What are the many null-infinities in Minkowskian space?
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Understanding Killing Vectors & Schwarzschild Geodesics
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Understanding Christoffel symbol in GR context
  • · Replies 19 ·
Replies
19
Views
6K
Graduate Non-metric Compatible Connections: Physically Plausible?
  • · Replies 9 ·
Replies
9
Views
2K
High School Einstein-Poincare Clock Synchronization Convention
  • · Replies 21 ·
Replies
21
Views
3K
High School Scale of Measurement vs Equipment Sensitivity: Does Symmetry Always Hold?
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Question on the energy needed to go at a relativistic speed
  • · Replies 30 ·
2
Replies
30
Views
3K
Undergrad Did Einstein Formulate an Aberration of Light Using Tangents?
  • · Replies 7 ·
Replies
7
Views
1K
Undergrad Strongest Evidence for Trapping Light in Schwarzschild Radius
  • · Replies 6 ·
Replies
6
Views
1K
Graduate Orthogonal spacelike and timelike vectors and inertial frames
  • · Replies 22 ·
Replies
22
Views
5K
Graduate Is 'Local Flatness' the Right Term for Describing Spacetime?
  • · Replies 99 ·
4
Replies
99
Views
12K
Undergrad Big Bang Theory: Spacetime or Matter First?
  • · Replies 1 ·
Replies
1
Views
1K
High School Constant speed between 2 objects close to the speed of light
  • · Replies 22 ·
Replies
22
Views
2K
Undergrad Is the Scale Difference Between E=pc and v=E/p Explained by Special Relativity?
  • · Replies 15 ·
Replies
15
Views
2K
Undergrad Comparing Planck's Mass, Length, Time and Energy
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad How can Lorentz transforms be inverted?
  • · Replies 13 ·
Replies
13
Views
2K
High School Energy, Mass, Speed of Light: Can We Reach It?
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad How is the 4-Dimensional Element Volume Used in Quantum Physics and Relativity?
  • · Replies 14 ·
Replies
14
Views
4K
Undergrad Why is the speed of light absolute?
  • · Replies 44 ·
2
Replies
44
Views
6K
High School Time dilation, relativistic mass and fuel consumption
  • · Replies 101 ·
4
Replies
101
Views
10K
High School Tensor Contraction with Metric for Stress Energy: Explained
  • · Replies 20 ·
Replies
20
Views
2K
Undergrad History of E=mc^2 Before Einstein
  • · Replies 28 ·
Replies
28
Views
6K
Undergrad Do We Need ESC in Earth's Atmosphere?
  • · Replies 12 ·
Replies
12
Views
2K
High School Meaning of "Speed of Light is Constant": Explained
  • · Replies 12 ·
Replies
12
Views
2K
Undergrad Does Conservation of Momentum & Energy Hold in the C.O.M. Reference Frame?
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Where is Contraction Point in Special Relativity?
  • · Replies 16 ·
Replies
16
Views
2K
Undergrad Lewis H Ryder: Cartesian to Polar Coord Transformations
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Accelerating Body Creates Space-Time Curvature?
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Quadrupole Moment Time Variation: Does Coordinate Choice Matter?
  • · Replies 22 ·
Replies
22
Views
2K
Graduate Lorentz Transformation Derivation Question
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad Inertial frames in changing gravitational fields
  • · Replies 66 ·
3
Replies
66
Views
6K
High School Moving Faster Than Light: Are There Symmetrical Rules?
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Is the inertia of a massive object the result of gravity wave generation?
  • · Replies 8 ·
Replies
8
Views
2K