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 On the Relativistic Twisting of a rotating cylinder (Max von Laue)
  • · Replies 192 ·
7
Replies
192
Views
18K
Graduate GR index gymnastics -- Have I misunderstood something or typo?
  • · Replies 12 ·
Replies
12
Views
2K
Undergrad Can a cosmologist cross an event horizon?
  • · Replies 24 ·
Replies
24
Views
3K
Undergrad LIGO Discovery - A question about space-time properties
  • · Replies 31 ·
2
Replies
31
Views
4K
Undergrad Relativism & Reality: Finding Length in Space
  • · Replies 10 ·
Replies
10
Views
2K
High School Why is every event in spacetime limited to our present point
  • · Replies 34 ·
2
Replies
34
Views
5K
High School Escape Velocity from Relativistic Sphere: Derivation & Intuition
  • · Replies 2 ·
Replies
2
Views
1K
High School Question: What Makes Light Move & Why Does It Travel at 299792458 mps?
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Space-Time: A New Vision of the Universe
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Multipole expansion of linearized field equations
  • · Replies 9 ·
Replies
9
Views
2K
High School Can there be many Worldlines in 4D spacetime?
  • · Replies 10 ·
Replies
10
Views
2K
High School Simultaneity in Special Relativity: Examining the Theory
  • · Replies 3 ·
Replies
3
Views
1K
High School Why Do Bodies in Free Fall Change Position?
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad How Does the Michelson-Morley Experiment Challenge Classical Physics?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Can an Altered Thought Experiment Reconcile the Special Relativity Conundrum?
  • · Replies 82 ·
3
Replies
82
Views
6K
Undergrad Why does relativity not affect the speed of light?
  • · Replies 32 ·
2
Replies
32
Views
4K
Graduate Why isn't cosmological constant a mass of the graviton?
  • · Replies 21 ·
Replies
21
Views
3K
Undergrad Are Evanescent Gravitational Waves Measurable
  • · Replies 20 ·
Replies
20
Views
3K
High School Does red-shifted light cause expansion of space?
  • · Replies 29 ·
Replies
29
Views
3K
Undergrad Searching Ether Frame: Introduction to Special Relativity
  • · Replies 6 ·
Replies
6
Views
2K
High School Difference betwen space-like and time-like singularities
  • · Replies 4 ·
Replies
4
Views
2K
High School Gravitational Force and the Endless Supply of Massless Particles
  • · Replies 8 ·
Replies
8
Views
2K
Graduate Simple 1D kinematic exercises with metric tensor
  • · Replies 10 ·
Replies
10
Views
2K
Graduate Schwarzschild coordinates beyond the event horizon
  • · Replies 2 ·
Replies
2
Views
1K
High School Dark Energy & Expansion of Spacetime
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Radial, exterior, outgoing, null geodesics in Schwarzschild
  • · Replies 11 ·
Replies
11
Views
3K
Undergrad Simultaneity Paradox in Space: What's Going On?
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Is the Christoffel symbol orthogonal to the four-velocity?
  • · Replies 15 ·
Replies
15
Views
2K
Graduate Perihelion Precession in GR with Robertson Expansion
  • · Replies 4 ·
Replies
4
Views
2K
High School Do gravity and acceleration alter the speed of light?
  • · Replies 21 ·
Replies
21
Views
2K
Undergrad Relativity and Eternalism: Proving the Possibility of 'Seeing the Future
  • · Replies 8 ·
Replies
8
Views
2K
High School Question about energy-mass relationship
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Bell's spaceship paradox: after the thread breaks....
  • · Replies 18 ·
Replies
18
Views
2K
High School Is it possible to reach the singularity?
  • · Replies 20 ·
Replies
20
Views
3K
Undergrad Thought experiment- Dropping a rope into a Black hole
  • · Replies 17 ·
Replies
17
Views
5K
Undergrad Relative Motion vs Time: Paradox Explained
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad The name of the 3+1 metric where time is normal to space?
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Relativity Matter & Vacuum Energy: Stress-Energy Tensor
  • · Replies 19 ·
Replies
19
Views
2K
High School Effect of Varying Distance on Radio Waves
  • · Replies 11 ·
Replies
11
Views
2K
Undergrad How Much Thrust is Needed to Hover Above a Black Hole?
  • · Replies 28 ·
Replies
28
Views
3K
Undergrad Special Relativity vs Newtonian Gravity: Understanding Their Compatibility
  • · Replies 12 ·
Replies
12
Views
2K
Undergrad Relativity Paradox w/ Charged Spheres
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad EFE: Stress-Energy & Spacetime Curvature
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Gravitational Waves Impact Earth's Orbit: Effects & Possibilities
  • · Replies 1 ·
Replies
1
Views
1K
High School WSU Shows Negative Mass Exists: Implications for Faster-Than-Light Travel?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Time Dilation Exp: Answers to Questions on A & B's Experiences
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad What Is the Lie Algebra of the Lorentz Group?
  • · Replies 7 ·
Replies
7
Views
4K
High School Error in Einstein's Biography on Twin Paradox?
  • · Replies 3 ·
Replies
3
Views
1K
High School How is that light from the sun takes about eight minutes to reach us
  • · Replies 39 ·
2
Replies
39
Views
5K
Undergrad Understanding Lorentz Transformation on Scalar Fields
  • · Replies 9 ·
Replies
9
Views
2K
Graduate Asymptotically Anti de-Sitter Spacetimes
  • · Replies 2 ·
Replies
2
Views
1K
High School Why does light move at the speed it does
  • · Replies 66 ·
3
Replies
66
Views
6K
High School Time dilation of an orbiting ship
  • · Replies 28 ·
Replies
28
Views
4K
High School Triplet Paradox and Thought: The Mystery of Time Dilation
  • · Replies 19 ·
Replies
19
Views
2K
Undergrad Does Traveling Through a Wormhole Affect Time Dilation?
  • · Replies 10 ·
Replies
10
Views
4K
Undergrad Proving the Wedge Product of 2 One-Forms is a 2-Form
  • · Replies 3 ·
Replies
3
Views
2K
High School Does Light Speed Affect Mass of Surrounding Objects?
  • · Replies 5 ·
Replies
5
Views
2K
High School Space Dilation Interaction Between Two Masses
  • · Replies 20 ·
Replies
20
Views
2K
Undergrad Vector Notion in GR: A Tangent Space at p
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad Two Clocks Orbiting a Non-Rotating Planet: Questions Answered
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Transform Bases for 4-Vectors in Ref. Frames
  • · Replies 1 ·
Replies
1
Views
1K
High School Light & Space: Investigating the Unknown
  • · Replies 102 ·
4
Replies
102
Views
7K
Undergrad Time: A Human Way of Measuring Change?
  • · Replies 7 ·
Replies
7
Views
1K
Undergrad Transformation of Matter into Black Holes
  • · Replies 21 ·
Replies
21
Views
2K
Undergrad Expansion of Plane of Projection: Terrel & Penrose
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Acceleration towards c without a reference frame and changes
  • · Replies 36 ·
2
Replies
36
Views
4K
Graduate Stress tensor in 3D Anti-De Sitter Space
  • · Replies 9 ·
Replies
9
Views
2K
High School Does Distance Contraction Cause Time Dilation?
  • · Replies 15 ·
Replies
15
Views
3K
High School "The search for Relativity Violations"
  • · Replies 7 ·
Replies
7
Views
1K
High School Numerically Solving GRT Problems - Textbook/Article Recommendation
  • · Replies 4 ·
Replies
4
Views
1K
High School Speed of Light & Space: Exceeding the "Universal Speed Limit
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Derive Relativistic Beaming Equation: Learn Physics Easily
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Clocks ON a rotating disk: What happens?
  • · Replies 6 ·
Replies
6
Views
3K
Undergrad Einstein Field Equations: PDEs or ODEs? - Thomas
  • · Replies 1 ·
Replies
1
Views
1K
High School Time Dilation Equation: Why is it to the Power -1/2? | AQA Exam Board
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Help to understand the derivation of the solution of this equation
  • · Replies 1 ·
Replies
1
Views
2K
High School Relativity of Simultaneity: Proving Lightning Strikes A & B Same Time?
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad Object Moving Faster Than Light?
  • · Replies 4 ·
Replies
4
Views
1K
Graduate Acceleration of a Satellite in General Relativity
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Understand Tensors: Difference from Matrices
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Lorentz Group Clarification: Boosts & g Matrix
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Mass Curving Space-Time: Equations Explained
  • · Replies 6 ·
Replies
6
Views
2K
High School Does Gravity Really Bend Space-Time or Just Create Confusion?
  • · Replies 3 ·
Replies
3
Views
2K
High School Transmitting information using gravitational waves
  • · Replies 66 ·
3
Replies
66
Views
5K
Undergrad Reference Frame Usage in General Relativity
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Carol Rovelli on the Notion of "Now" - Is He Right or Wrong?
  • · Replies 11 ·
Replies
11
Views
2K
High School Is it that hard to do Relativity in accelerating frames?
  • · Replies 33 ·
2
Replies
33
Views
3K
High School Can Phonon Excitations in BECs Revolutionize Gravitational Wave Detection?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Ignoring boundary term in the action
  • · Replies 32 ·
2
Replies
32
Views
4K
Undergrad The Electric field of a moving charge according to Purcell
  • · Replies 45 ·
2
Replies
45
Views
8K
Graduate How do magnetic fields curve spacetime?
  • · Replies 9 ·
Replies
9
Views
2K
Graduate Signs in the definition of anti de Sitter spacetimes
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Is spacetime orientation a convention?
  • · Replies 31 ·
2
Replies
31
Views
4K
Undergrad Is the Notation for Coordinate Transformation in Relativity Problematic?
  • · Replies 8 ·
Replies
8
Views
4K
Undergrad Solving Confusing Text in Wiki Friedmann Article
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Explore Time Dilation in Minkowski Diagrams
  • · Replies 10 ·
Replies
10
Views
2K
High School Gravitational Waves as Transportation | Space Travel
  • · Replies 6 ·
Replies
6
Views
1K
Undergrad Can Warping Spacetime Create a "Warp Bubble" in GR?
  • · Replies 1 ·
Replies
1
Views
2K
High School Spin & Frame of Reference: Detecting Motion in Space
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad In gravitational assistance, does the mass matter?
  • · Replies 10 ·
Replies
10
Views
2K