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.
Graduate Christoffel symbols derivation
  • · Replies 5 ·
Replies
5
Views
5K
Graduate Gravitational Waves: What Happens to a Body Experiencing One?
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Einstein-Cartan Theory: Dynamical Definition of Spin Tensor
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Question about Metric Tensor: Learn Differential Geometry
  • · Replies 11 ·
Replies
11
Views
2K
Graduate How does GR explain twist at the poles
  • · Replies 6 ·
Replies
6
Views
1K
Graduate Do non-black hole singularities have observable properties?
  • · Replies 17 ·
Replies
17
Views
2K
High School Light's Rest Mass: Debunking False Conclusions
  • · Replies 7 ·
Replies
7
Views
2K
High School On light clocks and reference frames
  • · Replies 62 ·
3
Replies
62
Views
6K
Graduate Black Holes: Volume & Forces Explored
  • · Replies 4 ·
Replies
4
Views
1K
Graduate Understanding Asymptotes in Rindler Space - Physics Forums
  • · Replies 7 ·
Replies
7
Views
1K
Undergrad What is the Effect of Gravity on Einstein's Train in Special Relativity?
  • · Replies 219 ·
8
Replies
219
Views
16K
Graduate What Happens to Wave Measurements When You Sail at the Speed of Light?
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Visual Effects of Special Relativity
  • · Replies 9 ·
Replies
9
Views
4K
Graduate Conservation of 3-Momentum & Energy in RoS
  • · Replies 16 ·
Replies
16
Views
2K
High School Is the Finite Speed of Light the Key to Understanding Relativity?
  • · Replies 27 ·
Replies
27
Views
3K
Graduate Why is Schwarzschild singularity not real
  • · Replies 13 ·
Replies
13
Views
2K
Graduate Time dilation at the event horizon of a black hole
  • · Replies 16 ·
Replies
16
Views
3K
High School How does time dilation appear to a third observer?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Is Einstein's warped time the same as gravitational time dilation?
  • · Replies 15 ·
Replies
15
Views
3K
Undergrad Gravitational Field: What Would Happen?
  • · Replies 8 ·
Replies
8
Views
2K
Graduate Why Do We Feel Acceleration If Gravity Is Just Curvature of Space-Time?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Confusion in General Relativity
  • · Replies 51 ·
2
Replies
51
Views
5K
Graduate Transitioning from Finite to Infinite Mass in a Black Hole
  • · Replies 6 ·
Replies
6
Views
2K
Graduate What Happens When Someone Walks on a Spaceship Traveling at the Speed of Light?
  • · Replies 8 ·
Replies
8
Views
4K
Undergrad Black Holes: Internal Space & Matter Movement
  • · Replies 4 ·
Replies
4
Views
1K
Graduate Gravitational Lenses: Does Gravity Distort Spacetime?
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Simultaneity agreeing in different frames
  • · Replies 13 ·
Replies
13
Views
1K
Graduate General Theory of Relativity: What & Why
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad Understanding Light Clock Confusion on Moving Trains - A Discussion
  • · Replies 44 ·
2
Replies
44
Views
4K
Graduate The Infalling Traveler's Perspective on Time and Mass in a Black Hole
  • · Replies 14 ·
Replies
14
Views
2K
Graduate Particle in Minkowski Space: Motion in a Flat Universe
  • · Replies 4 ·
Replies
4
Views
1K
Graduate Time Dilation and different clock types
  • · Replies 56 ·
2
Replies
56
Views
5K
Graduate Rotation in special relativity
  • · Replies 15 ·
Replies
15
Views
2K
Graduate Explaining the Behavior of a Ball on a Tilted Platform
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Time, spacelike foliations and timelike vector fields in GR
  • · Replies 7 ·
Replies
7
Views
3K
Graduate Is "now" relative or absolute?
  • · Replies 14 ·
Replies
14
Views
3K
Graduate Gravitational Fields: Same or Different?
  • · Replies 6 ·
Replies
6
Views
1K
Undergrad Unifying Gravity: The Quest to Understand a Fictitious Force
  • · Replies 23 ·
Replies
23
Views
4K
Graduate Space-Time Curvature in General Relativity
  • · Replies 9 ·
Replies
9
Views
3K
Graduate Deriving 8πG/c^4 in General Relativity
  • · Replies 1 ·
Replies
1
Views
6K
Graduate Momentarily co-moving inertial frames
  • · Replies 7 ·
Replies
7
Views
2K
Graduate Does Length Contraction affect measured velocity?
  • · Replies 7 ·
Replies
7
Views
3K
High School Inertial Frames of Reference - Understanding Special Relativity for 11-Year-Olds
  • · Replies 8 ·
Replies
8
Views
2K
Graduate What curves space and bends light: Mass or Gravity?
  • · Replies 22 ·
Replies
22
Views
3K
High School How Does Michelson-Morley Interferometer Measure Space-Time?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Speed of Light: Length Contraction & 20AU Paths
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Creating Mass w/ Velocity: Effects on EM Wave?
  • · Replies 5 ·
Replies
5
Views
1K
Graduate Question about time travel to the past
  • · Replies 19 ·
Replies
19
Views
2K
Graduate Derivation of Kirchhoff's Formula in Gravitational Radiation
  • · Replies 10 ·
Replies
10
Views
2K
Graduate Synge's "World Function": History & Significance
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad How do we orbit the sun when you can set your origin anywhere....
  • · Replies 22 ·
Replies
22
Views
2K
Graduate Are spatial and temporal dimensions interchangeable?
  • · Replies 7 ·
Replies
7
Views
2K
High School Could Everything on Earth Float Without Spacetime?
  • · Replies 42 ·
2
Replies
42
Views
4K
Graduate How does gravity affect the path of light?
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Gravitational Time Dilation: A Layman's Explanation
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad What does Purcell actually say about electromagnetism and relativity?
  • · Replies 32 ·
2
Replies
32
Views
7K
Graduate SR as Geometrical Constructions
  • · Replies 5 ·
Replies
5
Views
1K
High School Black Holes: Effects on Space Explored
  • · Replies 6 ·
Replies
6
Views
1K
Graduate What is the difference between standard and isotropic metrics?
  • · Replies 9 ·
Replies
9
Views
4K
Graduate Cosmological constant times the metric tensor
  • · Replies 12 ·
Replies
12
Views
2K
Graduate Is the equivalence principle related to the principle of relativity?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Explore Entropy & Event Horizons: Self-Taught Physics
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad SR Proves Eternalism: Is It Physically Substantial?
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Can You Truly Achieve No Motion in Space?
  • · Replies 18 ·
Replies
18
Views
2K
Graduate Derivation from Landau and Liffshitz, vol 6
  • · Replies 21 ·
Replies
21
Views
3K
Graduate Are Gravitational Waves Lossy?
  • · Replies 5 ·
Replies
5
Views
1K
Graduate Alternative definitions of geodesic
  • · Replies 45 ·
2
Replies
45
Views
5K
Graduate Covariant fields and new physics
  • · Replies 5 ·
Replies
5
Views
2K
High School Is time dilation just a problem with our clocks?
  • · Replies 84 ·
3
Replies
84
Views
6K
Graduate What is a gravity wave detector measuring?
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Is the center of mass fixed in Relativity?
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad What is the Principle of Equivalence and how was it determined?
  • · Replies 76 ·
3
Replies
76
Views
6K
High School What Are the Key Characteristics and Locations of Stellar Black Holes?
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Why doesn't the vertical light beam get out of a black hole?
  • · Replies 41 ·
2
Replies
41
Views
4K
Graduate Does Gravity Expand Space? Einstein's Theory Explained
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Using Light as a absolute frame of reference?
  • · Replies 55 ·
2
Replies
55
Views
5K
Graduate Time Dilation: Photon Reflecting Surface Experiment
  • · Replies 19 ·
Replies
19
Views
3K
Graduate Einstein-Hilbert action origin
  • · Replies 18 ·
Replies
18
Views
4K
Graduate Clarification on synchronous clocks
  • · Replies 10 ·
Replies
10
Views
3K
Graduate How to prove that something is a non-curvature singularity?
  • · Replies 23 ·
Replies
23
Views
3K
Graduate Understanding Invariance of Spacetime Intervals
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Falling Through a Hole in the Earth: GR Effects on Motion
  • · Replies 11 ·
Replies
11
Views
2K
Graduate What Would Happen if 2 People Were 1 Light Hour Apart?
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Momentum in special relativity
  • · Replies 6 ·
Replies
6
Views
1K
Graduate What's the 3d equation of the Alcubierre warp?
  • · Replies 8 ·
Replies
8
Views
2K
Graduate What is the relativity of simultaneity measuring?
  • · Replies 20 ·
Replies
20
Views
3K
Graduate Traversable wormhole without negative energy (paper)
  • · Replies 10 ·
Replies
10
Views
3K
Who Really Discovered Time and Its Origins?
  • · Replies 12 ·
Replies
12
Views
6K
Graduate 4 velocity in Schwarzchild metric
  • · Replies 11 ·
Replies
11
Views
5K
Graduate Spotting Errors in Transverse & Longitudinal Accelerations
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Relative Time in Space: What Speed for 1 Day Equals 1 Day on Earth?
  • · Replies 9 ·
Replies
9
Views
2K
Graduate Help with Twin Paradox: Understand Contradiction
  • · Replies 30 ·
2
Replies
30
Views
3K
Graduate Time Dilation by Light Alone? A Software Engineer's Exploration
  • · Replies 13 ·
Replies
13
Views
2K
Graduate Observing the event horizon of a black hole
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Inertial observers explanation for unruh thermalization
  • · Replies 9 ·
Replies
9
Views
2K
Graduate Muons hitting Earth half-life explanation in SR
  • · Replies 12 ·
Replies
12
Views
3K
Graduate What is the true nature of time and space for a photon?
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Travel to Light Speed: Acceleration & Deceleration
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Why is the Constant in Mass-Energy Equivalence C^2?
  • · Replies 7 ·
Replies
7
Views
2K
Graduate Do gravitational waves propogate slower when blocked by mass
  • · Replies 5 ·
Replies
5
Views
1K