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 Need for SR to Explain Magnetic Forces?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Understanding Tensors for General Relativity: A Comprehensive Guide
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Understanding Well-Defined Tensor on Manifold: Basic Concepts
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Metric Tensor: What is it and how does it relate to Riemannian geometry?
  • · Replies 57 ·
2
Replies
57
Views
6K
Graduate When will neutronization occur in the black hole formation process?
  • · Replies 55 ·
2
Replies
55
Views
5K
Graduate Index notation tensors quick question
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Spacetime Interval & Metric: Equivalent?
  • · Replies 5 ·
Replies
5
Views
2K
Graduate A GR question about null surfaces, vectors and coordinates
  • · Replies 7 ·
Replies
7
Views
4K
Undergrad Understanding Kronecker Delta: Why & How?
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Help Applying SR to Calculate Time Dilation
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Relativistic Gravity: Is It Weaker or Stronger? | Thought Experiment
  • · Replies 28 ·
Replies
28
Views
5K
Undergrad Is It Possible to Determine Motion in Relativity?
  • · Replies 7 ·
Replies
7
Views
1K
Undergrad Black Holes: Questions from a Non-Scientist
  • · Replies 4 ·
Replies
4
Views
1K
Graduate Lorentz Transformation: Matrix Relation, Metric Tensor
  • · Replies 1 ·
Replies
1
Views
2K
Graduate General relativity vs special relativity
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad The Twins Paradox: Understanding the Slow-Motion Effect
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Time Travel: Why Only to CTC's Creation?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Topology of Black Holes: Possible Topologies & Examples
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Difference Between Covariant & Contravariant Vectors Explained
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Einstein's Formulation of Tensor Equation: Was He Lucky?
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Light Bulb Moving at Half the Speed of Light: Effects on Light Halo and Length
  • · Replies 18 ·
Replies
18
Views
3K
Graduate Infinitesimal Mass & Distant Space: GR Effects
  • · Replies 4 ·
Replies
4
Views
1K
Graduate How does Maxwell equation suggest that the speed of light is the same
  • · Replies 30 ·
2
Replies
30
Views
7K
Graduate The Light Clock Problem: Resolving Observer Discrepancies
  • · Replies 3 ·
Replies
3
Views
1K
Graduate Understanding Einstein Field Equation & Metric Tensor
  • · Replies 10 ·
Replies
10
Views
3K
Graduate Can gravity cause an object to reach the speed of light?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Light Exceeds Its Own Speed Limit?
  • · Replies 7 ·
Replies
7
Views
1K
Undergrad Special relativity and the speed of light constant
  • · Replies 24 ·
Replies
24
Views
3K
Graduate Time and Light: A Curious Link
  • · Replies 11 ·
Replies
11
Views
2K
Undergrad If photons have no mass,why would black holes attract light?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Equivalence of Matter Energy and Space-Time?
  • · Replies 12 ·
Replies
12
Views
3K
Graduate Is a Pseudo-Riemann Metric Intrinsic to General Relativity?
  • · Replies 20 ·
Replies
20
Views
3K
Graduate Deriving Equation 4.8 in Special Relativity: Tips and Tricks
  • · Replies 13 ·
Replies
13
Views
2K
Undergrad Time Dilation at Near Light Speed: Answers to a Thought Exercise
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Black Holes & Time Travel: Wild Speculation
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Choice of action to geodesic equations
  • · Replies 18 ·
Replies
18
Views
2K
Graduate The Center of the Earth and Black holes and Gravity
  • · Replies 39 ·
2
Replies
39
Views
5K
Graduate EM/GR Radiation as Scattering?
  • · Replies 16 ·
Replies
16
Views
1K
Graduate Direct Experimental Evidence of Lorentz Transformations
  • · Replies 13 ·
Replies
13
Views
3K
Graduate Theoretical Extent of Redshift - How Far Can It Go?
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Could Dark Matter and Dark Energy Be Illusions of Imperfect Physics?
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Causality and quantum entanglement
  • · Replies 15 ·
Replies
15
Views
2K
Graduate Will Light Speed Travel Affect Perception of Andromeda Galaxy's Age and Distance?
  • · Replies 19 ·
Replies
19
Views
2K
Graduate Understand Relativity & Lorentz Transformation - Aaron
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Introductory Material for Relativistic Boltzmann Equation
  • · Replies 4 ·
Replies
4
Views
1K
Graduate Where can I find solutions to the problems in Hartle's Gravity: An Introduction?
  • · Replies 3 ·
Replies
3
Views
7K
Graduate What Does a Rotating Mass in Kerr Metric Rotate With Respect To?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Rindler Horizon and Lorentz contraction
  • · Replies 12 ·
Replies
12
Views
2K
Graduate Definition of Form-Invariant Function: Q&A
  • · Replies 3 ·
Replies
3
Views
1K
Graduate Mass-Energy: Particle Behavior & Properties
  • · Replies 4 ·
Replies
4
Views
909
Graduate Ricci Tensor Equation in Zee's "Einstein's Gravity in a Nutshell" Explained
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Why Do Covariant and Contravariant Vectors Use Opposite Indexing?
  • · Replies 28 ·
Replies
28
Views
4K
Graduate Penrose Diagram for the Kerr Black Hole
  • · Replies 19 ·
Replies
19
Views
7K
Graduate Effects of relativistic mass on astronaut
  • · Replies 26 ·
Replies
26
Views
3K
Graduate GR Intuition: Measuring Physical Quantities on Tangent Spaces of M
  • · Replies 16 ·
Replies
16
Views
2K
Undergrad Gravity Waves: Frequency & Understanding Needed
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Adding Another Time Axis to Space-Time Diagram
  • · Replies 5 ·
Replies
5
Views
1K
Graduate Speed of light related to mass
  • · Replies 13 ·
Replies
13
Views
2K
Graduate Is a Zero Frame of Reference Possible in the Universe?
  • · Replies 18 ·
Replies
18
Views
3K
Graduate Spacetime Curvature by Mass: Gravity Impact?
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Gorini vs. Jin: Superluminal Frames in 1+1 Dimensions
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Is relativity reciprocal or directional?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Is it true than general relativity can be deduced from a max
  • · Replies 4 ·
Replies
4
Views
1K
Graduate Throwing something into a black hole
  • · Replies 11 ·
Replies
11
Views
2K
Graduate GR Journal: Equivalence Principle & Tidal Forces
  • · Replies 7 ·
Replies
7
Views
2K
Graduate Thomas precession Goldstein/Eisberg versus Taylor/Wheeler
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Does relativity change the rules for time being a vector or a scalar?
  • · Replies 25 ·
Replies
25
Views
7K
Graduate Close to the speed of light relative to what?
  • · Replies 27 ·
Replies
27
Views
3K
Graduate Kerr & Kerr-Newman Solutions in Straumann's GR
  • · Replies 8 ·
Replies
8
Views
2K
Graduate Understanding Lambda Mu Nu Prime and Its Indices
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Now plane moving to the past and future
  • · Replies 17 ·
Replies
17
Views
2K
Undergrad Does Mass Really Change with Velocity Near the Speed of Light?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Einstein's argument for a finite universe
  • · Replies 10 ·
Replies
10
Views
4K
Graduate Help with Notation: (Λ-1)μν=Λνμ ≡ ημρΛρσησν
  • · Replies 2 ·
Replies
2
Views
949
Graduate Deriving the Lorentz Transformation
  • · Replies 27 ·
Replies
27
Views
6K
Graduate Learning General Relativity: Finding Examples with Numbers
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Practice calculations for a relativistic speed object
  • · Replies 10 ·
Replies
10
Views
3K
Graduate Experimental determination of the metric tensor
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Are Electron Neutrinos Tachyons? Expert Analysis of 1408.2804v7
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Proper mass vs Schwarzschild Mass
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Ball Thrown Up: Constant Speed Despite Height
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Could black holes have no singularity?
  • · Replies 7 ·
Replies
7
Views
2K
Graduate Are force fields deformed by length contraction?
  • · Replies 28 ·
Replies
28
Views
3K
Graduate Understanding Einstein's Field Equations Solutions
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Sphere-Ellipsoid Metric Transformation at u = 0.99c
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Do Photons Perceive Time?
  • · Replies 4 ·
Replies
4
Views
1K
High School Light Constant: Speed, Increase, Decrease?
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad General Case of Relative Velocities
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Is the twin paradox affected by the topology of a torus?
  • · Replies 7 ·
Replies
7
Views
2K
Graduate Useful relativistic gravity equation of motion
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Do we have time because we are moving?
  • · Replies 72 ·
3
Replies
72
Views
10K
Graduate Relativistic Orbits: Effects of Mass Increase & Length Contraction
  • · Replies 13 ·
Replies
13
Views
2K
Graduate Effect of Magnitude & Direction on Organpipe's Note
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Riemann tensor and derivatives of ##g_{\mu\nu}##
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Where Can I Find a Detailed Explanation of Stress-Energy Tensors in GR?
  • · Replies 93 ·
4
Replies
93
Views
12K
Graduate Kind of newbie question about gravity
  • · Replies 55 ·
2
Replies
55
Views
5K
Graduate Comoving Observers Concepts cosmology
  • · Replies 9 ·
Replies
9
Views
7K
Graduate Understanding the Metric Tensor: A 4-Vector Perspective
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Black Holes & Hawking Radiation: Time Paused in Gravity?
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Does Gravity Affect Time Dilation on a Flat, Non-Rotating Earth?
  • · Replies 2 ·
Replies
2
Views
1K