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 Energy Formulas in SR: Explained
  • · Replies 42 ·
2
Replies
42
Views
4K
Graduate Trouble wrapping my head around GR
  • · Replies 17 ·
Replies
17
Views
2K
Graduate Covariant Derivative - where does the minus sign come from?
  • · Replies 9 ·
Replies
9
Views
3K
High School What is the Real Life Twin Paradox?
  • · Replies 10 ·
Replies
10
Views
2K
Graduate Orthonormal Basis in General Relativity - Carroll
  • · Replies 3 ·
Replies
3
Views
1K
Graduate Understanding General Relativity & Quantum Gravity
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Redshift in Terms of k | General Relativity
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Relativistic mass in Six Not-so-easy Pieces (Feynman)
  • · Replies 13 ·
Replies
13
Views
2K
Graduate Gauge Formalism of Gravity: A-Z Guide
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Are time machines possible? (serious)
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Yet another "never crosses the horizon" question
  • · Replies 12 ·
Replies
12
Views
2K
Graduate The Significance of FRW Metric for Cosmological Redshift
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Help! EM Exam: Covariant LW Fields Derivation Questions
  • · Replies 1 ·
Replies
1
Views
1K
Graduate What is the Relationship Between Time and Matter?
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Explaining Magnetism Using Special Relativity
  • · Replies 9 ·
Replies
9
Views
2K
Graduate Spacetime: Is There Zero Separation for Charged Particles?
  • · Replies 7 ·
Replies
7
Views
2K
Graduate Gravitational Collapse Calculations Problem Solved
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Length contraction test in electrical circuits
  • · Replies 11 ·
Replies
11
Views
2K
Graduate Escape the Horizon: Can I Pull My Friend Back?
  • · Replies 15 ·
Replies
15
Views
2K
Graduate What is the significance of hypervolume in quantum physics?
  • · Replies 10 ·
Replies
10
Views
2K
Graduate Product of Tangent Vectors & Affine Parameter
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Dirac theory over gravitational constant reduction.
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Does Entering a Black Hole Speed Up Universal Aging?
  • · Replies 43 ·
2
Replies
43
Views
6K
Undergrad Algebra Question: Where Does the 2 Come From?
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Schwarzschild Extension Coordinate Transformation Algebra
  • · Replies 8 ·
Replies
8
Views
2K
Graduate Force in the Centre of a Black Hole: Explained
  • · Replies 4 ·
Replies
4
Views
1K
Graduate Clarifying Black Hole Horizons: An Examination of Observer Perspectives
  • · Replies 133 ·
5
Replies
133
Views
10K
Graduate Comoving/Proper distance, transverse comoving distance
  • · Replies 1 ·
Replies
1
Views
5K
Undergrad Time Dilation on Earth: Why Hemisphere Matters
  • · Replies 59 ·
2
Replies
59
Views
6K
Undergrad Light Travel After Big Bang: Baseball Universe Impact
  • · Replies 7 ·
Replies
7
Views
2K
Graduate Tod & Hughston GR Intro: FRW Metric Derivation w/ R=6k or R=3k?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Computing trajectories in Schwarzschild spacetime
  • · Replies 35 ·
2
Replies
35
Views
8K
Graduate Curvature Singularity: Necessary & Sufficient Conditions
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Is it possible to stop time completely?
  • · Replies 6 ·
Replies
6
Views
5K
Graduate Light Speed at 0.8c: Is My Understanding Correct?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Stationary/ Static Conditions Metric?
  • · Replies 6 ·
Replies
6
Views
2K
Graduate How does the curvature of spacetime affect space?
  • · Replies 13 ·
Replies
13
Views
2K
Undergrad Is this quote from Steven Weinberg right?
  • · Replies 24 ·
Replies
24
Views
4K
Graduate Help - Speed of Light: Get Answers to Your Questions
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Godel Metric Cosmological Constant
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Does Metric Signature Affect Torsion Definition?
  • · Replies 1 ·
Replies
1
Views
1K
Graduate If the local is defined as the 'Hubble radius'
  • · Replies 5 ·
Replies
5
Views
1K
Graduate Ricci Tensor/Scalar Contraction Manipulation Q&A
  • · Replies 9 ·
Replies
9
Views
2K
Graduate Understanding Proper Time in General Relativity & Special Relativity
  • · Replies 8 ·
Replies
8
Views
2K
Graduate Question about Special Relativity and matching results
  • · Replies 28 ·
Replies
28
Views
3K
Graduate Valence Tensor of "DVu/Du" Acting on Vector: Analyzing 1 to 1
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Speed of light vs speed of sound
  • · Replies 32 ·
2
Replies
32
Views
9K
Undergrad Gravity & Matter: What is the Connection?
  • · Replies 6 ·
Replies
6
Views
3K
Graduate What Causes Frame-Dragging? Explained in Vernacular
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Will the Earth Observers See a Burning Spaceship?
  • · Replies 9 ·
Replies
9
Views
2K
Graduate Bangs2.pdfEarman's "Lost Socks & Green Slime
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Simultaneous birth of two people in an inertial frame
  • · Replies 25 ·
Replies
25
Views
3K
Graduate Vanishing of Einstein tensor from Bianchi identity
  • · Replies 17 ·
Replies
17
Views
4K
Graduate Clocks Within Each Ship in Bell Spaceship Paradox
  • · Replies 141 ·
5
Replies
141
Views
13K
Graduate Questions on relativistic mass and directional relativity?
  • · Replies 30 ·
2
Replies
30
Views
4K
Graduate Neutron Stars & SR: Explained for Discovery Channel
  • · Replies 7 ·
Replies
7
Views
2K
Graduate How Does a Neutron Star Affect the Mass of an Object Falling Into It?
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Deriving Schwarz Metric Weak Limit: Carroll's Lecture Notes 1997
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Riddle Me This: Vibrating at Light Speed & Time Travel
  • · Replies 4 ·
Replies
4
Views
2K
Graduate FTL Expansion of Space: Rapidity & Infinity
  • · Replies 8 ·
Replies
8
Views
2K
Graduate How to classify coordinate as S-L,Null,T-L?
  • · Replies 15 ·
Replies
15
Views
2K
Graduate Type Godel Metric Line Element - Get Help Here!
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Inequalities. Special relativity.
  • · Replies 9 ·
Replies
9
Views
2K
Graduate Weak Field Approx, algebra geodesic equation
  • · Replies 28 ·
Replies
28
Views
3K
Graduate Metric tensor with diagonal components equal to zero
  • · Replies 15 ·
Replies
15
Views
5K
Graduate Generalisation of Time Dilation
  • · Replies 13 ·
Replies
13
Views
2K
Graduate Relative Velocities Equal in Std Config? Lorentz Transform
  • · Replies 3 ·
Replies
3
Views
1K
Graduate How to imagine higher dimensions?
  • · Replies 15 ·
Replies
15
Views
4K
Graduate Relativistic correction to the gravitational force?
  • · Replies 14 ·
Replies
14
Views
3K
Graduate Understanding the equivalence principle
  • · Replies 11 ·
Replies
11
Views
2K
Graduate Metric for uniform constant acceleration?
  • · Replies 18 ·
Replies
18
Views
4K
Graduate Using General Relativity to analyze the twin paradox
  • · Replies 152 ·
6
Replies
152
Views
14K
Graduate How do you calculate change in time at the speed of light?
  • · Replies 12 ·
Replies
12
Views
2K
Graduate Difficulties in the Computation of the Kretschmann scalar
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Near-instant Acceleration / Clocks
  • · Replies 15 ·
Replies
15
Views
2K
Graduate Measuring possible one-way anistropy of light speed
  • · Replies 28 ·
Replies
28
Views
4K
Graduate Theory on Speed of Light & Faster Travel
  • · Replies 5 ·
Replies
5
Views
1K
Graduate Twin Paradox in Kerr Metric - Help Needed
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Composition of 2 transformations of E
  • · Replies 10 ·
Replies
10
Views
2K
Graduate Can we distinguish between black holes and white holes?
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Sphere of Uniform Density: Exact Solution to Einstein's Field Eqns?
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Connection between Lorentz covariance and special relativity
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Gravity and General Relativity: The Curvature of Space-Time
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Tensor Density Transformation Law: Order of Jacobian Matrix?
  • · Replies 6 ·
Replies
6
Views
2K
High School Inertial and Non-Inertial Reference Frames
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Mass of Box A vs Box B with Photon Inside
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Symmetrical time dilation implies relativity of simultaneity
  • · Replies 9 ·
Replies
9
Views
4K
Undergrad Does the mass of a spinning object twist spacetime?
  • · Replies 14 ·
Replies
14
Views
2K
Graduate Transformation equation of velocity contradicts stellar aberration?
  • · Replies 11 ·
Replies
11
Views
2K
Graduate What is the Geodesic Equation for FRW Metric's Time Component?
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Quick expression on geodesic equation
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Proving Total Covariant/Total Partial Derivative EFE Derivation
  • · Replies 3 ·
Replies
3
Views
1K
Graduate Proof of Transformation Equation for Electric Field Ex
  • · Replies 7 ·
Replies
7
Views
2K
High School If we can move at the speed of light, can we pass a small hole?
  • · Replies 27 ·
Replies
27
Views
3K
Graduate Basic GR Questions: Krushkal Extension of Schwarzschild Metric
  • · Replies 18 ·
Replies
18
Views
2K
Graduate Time Dilation Effects of Warp Travel | 65 Characters
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Intuitive Interpretation of Rest Energy
  • · Replies 4 ·
Replies
4
Views
3K
Graduate How to calculate cosmological constant?
  • · Replies 17 ·
Replies
17
Views
2K
Graduate Tensor density from wedge product
  • · Replies 10 ·
Replies
10
Views
3K
Graduate Spatially separated events are time relative but .
  • · Replies 31 ·
2
Replies
31
Views
5K