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 Trying to understand the Why or Relativity.
  • · Replies 17 ·
Replies
17
Views
3K
Graduate Slowly add mass to a neutron star till it collapses.
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Bivectors, Cartan Geometry and Curvature
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Relativistic Acceleration Contradiction
  • · Replies 10 ·
Replies
10
Views
3K
Graduate [Special relativity - Mathematical background] Tensor and pseudo-tensor
  • · Replies 2 ·
Replies
2
Views
5K
Undergrad Relativity & Mass Increase: Is it Just a Momentary Expansion?
  • · Replies 12 ·
Replies
12
Views
3K
Graduate 45 dergree mirrors in Special Relativity
  • · Replies 13 ·
Replies
13
Views
8K
Undergrad Is this an Ill-posed Question?
  • · Replies 12 ·
Replies
12
Views
3K
Graduate Energy Density of the gravitational field
  • · Replies 1 ·
Replies
1
Views
2K
Graduate What is the Role of the Cosmological Constant in the Expansion of the Universe?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Anti-matter black-hole, matter black hole, different?
  • · Replies 6 ·
Replies
6
Views
3K
Graduate How Does Relativity Affect the Length of Spinning Circles at High Speeds?
  • · Replies 20 ·
Replies
20
Views
4K
Graduate Expanding universe and light detection
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Wormhole Time Machine: As Time Goes On
  • · Replies 3 ·
Replies
3
Views
3K
High School Why is light travelling in straight line? (see restrictions)
  • · Replies 23 ·
Replies
23
Views
11K
Graduate Is Time a Testable Dimension in Science?
  • · Replies 29 ·
Replies
29
Views
5K
Graduate Acceleration in an inertial worldline?
  • · Replies 9 ·
Replies
9
Views
3K
Graduate Explanation of Wiki regarding Geodesics as Hamiltonian Flows:
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Four-vector from 3 space components?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate I'm learning about relativity and, by extension, the classic
  • · Replies 30 ·
2
Replies
30
Views
4K
Graduate Doing General Relativity with Cartesian coordinates?
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Light Cones | QM: Understanding the Cone Shapes & Events Outside the Light Cone
  • · Replies 8 ·
Replies
8
Views
3K
Graduate Reciprocal Lorentz Contraction Mismatch
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Calculating Time Dilation and Simultaneity in Special Relativity
  • · Replies 13 ·
Replies
13
Views
3K
Graduate Gaussian Co-ordinates-background and derivation
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Is black hole elementary particle?
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Speed of light vertical and horizontal in gravity
  • · Replies 1 ·
Replies
1
Views
2K
High School Travelling In A Straight Line In Space
  • · Replies 3 ·
Replies
3
Views
4K
Graduate What is the Orientation of Lightcones in a Kerr Ring?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Time Dilation and/or Kinetic energy the same/different?
  • · Replies 4 ·
Replies
4
Views
3K
Graduate A Few General Questions About Special Reletivity
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Radius of Universe, electrons, and strings.
  • · Replies 8 ·
Replies
8
Views
2K
Graduate A few questions about the Lorentz factor
  • · Replies 12 ·
Replies
12
Views
9K
Graduate What is the speed of light in gravity?
  • · Replies 5 ·
Replies
5
Views
2K
Graduate How Does Relativity Influence Musical Octaves?
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Does Special Relativity Affect Clock Synchronization on a Moving Spaceship?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Relativity and Inertia - An Exploration
  • · Replies 31 ·
2
Replies
31
Views
5K
Graduate Are Both Coordinate Systems in Special Relativity Considered Inertial?
  • · Replies 82 ·
3
Replies
82
Views
13K
Graduate Does Empty Space Reflect Einstein's 4D Space-Time Curvature?
  • · Replies 18 ·
Replies
18
Views
3K
Graduate The speed of gravitational field propagation
  • · Replies 61 ·
3
Replies
61
Views
11K
Graduate Linearized Gravity: Why & How Does it Follow?
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Say gravity were larger, matter burns faster?
  • · Replies 15 ·
Replies
15
Views
3K
Graduate Is a scalar field incompatible with the Principle of Equivalence?
  • · Replies 11 ·
Replies
11
Views
3K
Graduate Value of c and strange things that don't happen when at c
  • · Replies 34 ·
2
Replies
34
Views
5K
Graduate How many people understand General relativity by Enshtein?
  • · Replies 16 ·
Replies
16
Views
14K
Graduate How are watches syncronized
  • · Replies 7 ·
Replies
7
Views
3K
Graduate Special Relativity Velocity Addition: Vector or Axis?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Catching a Train: Physics & Possibilities of Hitchhiking
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Understanding Length Contractions and Time Dilation
  • · Replies 9 ·
Replies
9
Views
3K
Graduate Meaning of Lorentz Transformations purely mathematically ?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Relativistic Vectors: Opposite Direction Assumption
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Caltech Gravitational Wave theory - videos included
  • · Replies 1 ·
Replies
1
Views
7K
Graduate Spinning tornado wheel - circumference and radius
  • · Replies 26 ·
Replies
26
Views
8K
Graduate Temperature during black hole collapse
  • · Replies 12 ·
Replies
12
Views
3K
Graduate Kruskal and Penrose diagrams for a Minkosky spacetime
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Simulating electron beam - what equations to use?
  • · Replies 16 ·
Replies
16
Views
5K
Graduate Do Photons Produce Gravitational Fields?
  • · Replies 26 ·
Replies
26
Views
5K
Graduate Derivation of momentum & energy formulas
  • · Replies 2 ·
Replies
2
Views
5K
Graduate Derivation of E=mc2: Examining Einstein's Theory
  • · Replies 6 ·
Replies
6
Views
9K
Graduate How the universe looks like at the speed of light
  • · Replies 6 ·
Replies
6
Views
3K
Black Hole Animation: Find Trustworthy Links for Astronomy Presentation
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Invariant Tensors in GR and SR
  • · Replies 3 ·
Replies
3
Views
3K
Graduate What is time, and can it be changed?
  • · Replies 19 ·
Replies
19
Views
5K
Graduate We can't determine who is moving?
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Has anybody read this book on relativity?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Does Hubble's law implies accelerated expansion?
  • · Replies 4 ·
Replies
4
Views
4K
Undergrad Conservation of Mass: Is It True?
  • · Replies 10 ·
Replies
10
Views
3K
Graduate Lorentz Transformation Vector Form Formula
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Explaining the Inverse Square Law of Gravity
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Why Does Traveling at High Speeds Affect Aging Compared to Staying on Earth?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate A deviation from General Relativity on cosmic scales
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Time Dilation Paradox (variant distance between two accelerating bodies)
  • · Replies 8 ·
Replies
8
Views
3K
Graduate Light in the box gravity - question.
  • · Replies 11 ·
Replies
11
Views
2K
Graduate So gravity and accel can be transformed into eachother, but what about
  • · Replies 13 ·
Replies
13
Views
2K
Graduate Misner-Thorne-Wheeler, p.92, Box 4.1, typo?
  • · Replies 2 ·
Replies
2
Views
4K
Graduate What is the significance of causality in relativity?
  • · Replies 20 ·
Replies
20
Views
4K
Graduate Gravitational time dilation question
  • · Replies 12 ·
Replies
12
Views
2K
Graduate In simplest terms, what is null dust?
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Constancy of light speed implied in time and clocks
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Can Einstein's Theory of Relativity Make Time Travel Possible?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Active and passive gravitational mass
  • · Replies 2 ·
Replies
2
Views
6K
Graduate What's Wrong with Big Clock Moving at 0.1C?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Understanding the Twin Paradox: Breaking the Symmetry in Time Dilation
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Space-Time Fabric: Understanding 3D & Time Together
  • · Replies 3 ·
Replies
3
Views
4K
Graduate Proving Tensor Theorem: $\frac{\partial}{\partial t} \int {T^{0\alpha} d^3x} =0$
  • · Replies 11 ·
Replies
11
Views
2K
Graduate How do null coordinates help understand photon's frame of reference?
  • · Replies 45 ·
2
Replies
45
Views
7K
Graduate Calculating the Ricci Tensor in 5D Using GRTensor
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Really moving. What does Bridgman mean.
  • · Replies 9 ·
Replies
9
Views
2K
Graduate Can someone explain this time dilation problem to me?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Black Hole Time Machine (time dilation)
  • · Replies 13 ·
Replies
13
Views
10K
Graduate Geosynchronous Orbits: Explaining Relativistic Motion
  • · Replies 7 ·
Replies
7
Views
3K
Graduate Dilation & Contraction-First Post
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Has Gravity Probe B proved framed dragging
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Rotating disks and time dilation
  • · Replies 7 ·
Replies
7
Views
6K
Graduate Heliocentrism from a relativistic standpoint
  • · Replies 38 ·
2
Replies
38
Views
8K
Graduate Retrieving Information from Black Holes (Please repond)
  • · Replies 7 ·
Replies
7
Views
3K
Graduate Is Distance/space Lorentz contracted?
  • · Replies 84 ·
3
Replies
84
Views
13K
Graduate Solving the Stress-Energy Tensor Problem
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Does coupling to stress-energy imply coupling to Ricci?
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Is Kinetic Energy Different in Relativity?
  • · Replies 21 ·
Replies
21
Views
5K