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 More on Parallel Transport: Existence & Uniqueness
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Is Non-Zero Metric Determinant Enough for a Global Coordinate System?
  • · Replies 9 ·
Replies
9
Views
1K
Undergrad Gravitational time dilation near Earth
  • · Replies 37 ·
2
Replies
37
Views
5K
Undergrad Relativistic velocity scenario
  • · Replies 11 ·
Replies
11
Views
2K
High School Okun argument against relativistic mass - pedagogy
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Prediction of GR for the gravitational pull
  • · Replies 11 ·
Replies
11
Views
2K
Undergrad Energy-Momentum Tensor: Validity in Relativity?
  • · Replies 8 ·
Replies
8
Views
3K
High School Gravity of hollow sphere vs. solid sphere of same mass
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Understanding parallel transfer
  • · Replies 36 ·
2
Replies
36
Views
7K
High School Can sound distort the fabric of space?
  • · Replies 31 ·
2
Replies
31
Views
4K
High School Metric tensor of a perfect fluid in its rest frame
  • · Replies 13 ·
Replies
13
Views
3K
Undergrad Multivariable Calculus Project: Spacetime/Black Holes
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Rindler coordinates in Minkowski spacetime
  • · Replies 4 ·
Replies
4
Views
4K
High School Is a "meter" observer dependent?
  • · Replies 12 ·
Replies
12
Views
2K
High School Confused About the Length of Time Between Ticks in Time Dilation
  • · Replies 21 ·
Replies
21
Views
5K
Graduate ADM mass of a spacetime and mass of the associated matter
  • · Replies 6 ·
Replies
6
Views
3K
Undergrad Math of Relativity: Topology Needed?
  • · Replies 19 ·
Replies
19
Views
2K
Undergrad Levi-Civita symbol in Minkowski Space
  • · Replies 14 ·
Replies
14
Views
8K
High School Length Contraction & Time Dilation: Relative Velocity Impact?
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Defining the surface gravity of a black hole
  • · Replies 12 ·
Replies
12
Views
4K
Undergrad Relativistic Energy Equations: When to Use Each
  • · Replies 5 ·
Replies
5
Views
2K
High School Negative Mass: Does it Impact Spacetime & Gravity?
  • · Replies 1 ·
Replies
1
Views
1K
High School Lorentz Transformation direction of motion
  • · Replies 8 ·
Replies
8
Views
3K
Undergrad Why is time dilation not symmetric for satellites and Earth?
  • · Replies 15 ·
Replies
15
Views
3K
Undergrad What is the velocity of light in uniformly rotating frame?
  • · Replies 9 ·
Replies
9
Views
2K
High School Uniform motion and time dilation - real or perspective based
  • · Replies 30 ·
2
Replies
30
Views
3K
High School Trying to understand how FTL would violate causality....
  • · Replies 145 ·
5
Replies
145
Views
17K
Graduate Questions about Einstein's 1916 GR Paper: Answers Needed
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Minimal coupling in general relativity
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Diffeomorphism invariance and gauge invariance
  • · Replies 2 ·
Replies
2
Views
2K
High School Are All Four GW Detectors Currently Operational for Simultaneous Observing?
  • · Replies 3 ·
Replies
3
Views
1K
High School Does Time Dilation Occur in a Perfectly Circular Orbit at Near-Light Speed?
  • · Replies 93 ·
4
Replies
93
Views
11K
Graduate Compute Induced Metric on Kerr Event Horizon
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Dark Matter vs Modified Gravity: Uncovering New Theories
  • · Replies 4 ·
Replies
4
Views
2K
Graduate General relativity -- Proof of energy measured by observer
  • · Replies 8 ·
Replies
8
Views
4K
Graduate General relativity. What does momentum conservation mean?
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Why Open Manifolds are Relevant in Relativity
  • · Replies 17 ·
Replies
17
Views
2K
Graduate General Relativity: Components of ds^2
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Relativity, magnetic attraction, and comoving electrons....
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad Gravity: Constant on Earth? | Is It Divisible?
  • · Replies 10 ·
Replies
10
Views
1K
High School Where is all the places that QM and SR/GR disagree?
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Embeddings of Gauge Group in Einstein-Yang-Mills Theory
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Understanding ISSS from Minkowski Space to Poincaré Group
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Is Einstein's elevator different for gravity?
  • · Replies 42 ·
2
Replies
42
Views
4K
High School The Speed of Light and Time: A Constant Debate
  • · Replies 12 ·
Replies
12
Views
2K
Graduate Understanding Orbital Angular Momentum Coupling to Christoffel Connection
  • · Replies 1 ·
Replies
1
Views
2K
High School What do I see while falling into a black hole?
  • · Replies 31 ·
2
Replies
31
Views
4K
Undergrad Relativistic Momentum: Deriving an Expression
  • · Replies 25 ·
Replies
25
Views
3K
Undergrad Green's theorem in tensor (GR) notation
  • · Replies 19 ·
Replies
19
Views
4K
Undergrad Speed of Light Logic: Flaw Explained
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Question about GPS clock synchronization
  • · Replies 22 ·
Replies
22
Views
3K
Undergrad Is there a physical explanation for the relationship between light and space?
  • · Replies 159 ·
6
Replies
159
Views
11K
Undergrad Solving Confusion About Parallelograms in Curved Spacetime
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Lorentz transformation in 2 dimensions
  • · Replies 5 ·
Replies
5
Views
4K
High School Which frame of reference is the correct one?
  • · Replies 13 ·
Replies
13
Views
2K
Graduate Intro to String Theory: Lightcone Gauge & Oscillators
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Equations for observed distance/velocity in SR
  • · Replies 40 ·
2
Replies
40
Views
4K
High School Exercise for Students: Incorrect Special Relativity Analysis
  • · Replies 3 ·
Replies
3
Views
1K
High School How Does Speed Influence Time and Particle Decay in Einstein's Theory?
  • · Replies 91 ·
4
Replies
91
Views
7K
High School Special Relativity Q: Choosing Light as Ref
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Number of independent components of the Riemann tensor
  • · Replies 6 ·
Replies
6
Views
4K
Undergrad Index Notation for Lorentz Transformation
  • · Replies 11 ·
Replies
11
Views
9K
High School The perfect relativistic quantum particles simulation
  • · Replies 2 ·
Replies
2
Views
1K
High School Relativistic simultaneity and symmetry problem
  • · Replies 52 ·
2
Replies
52
Views
4K
High School If anyone here doesn't yet get the twin "paradox". .
  • · Replies 11 ·
Replies
11
Views
2K
Undergrad Gravitational time dilation calculation near a Black Hole
  • · Replies 8 ·
Replies
8
Views
7K
Graduate Find EM Potential from EM Tensor | Math Solutions
  • · Replies 7 ·
Replies
7
Views
1K
Undergrad What is the most correct way to write a vector in GR?
  • · Replies 16 ·
Replies
16
Views
2K
Graduate Distance from Black Hole to experience Time Dilation
  • · Replies 14 ·
Replies
14
Views
9K
Undergrad Classical Newtonian Physics: Space & Time Independence
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Deriving Weak-Field Schwarzschild Metric from LEFEs
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Interactive Minkowski Diagram Tool
  • · Replies 4 ·
Replies
4
Views
4K
High School Rotating Disks: Particle Movement & Spin
  • · Replies 12 ·
Replies
12
Views
2K
Graduate Are Spacelike and Timelike Orthogonal: Mathematical Proof Explained
  • · Replies 12 ·
Replies
12
Views
5K
Undergrad How Does Time Dilation Affect Jill's Perception of Jack's Clocks?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad If Mass is relative, is "gravitational" mass relative?
  • · Replies 19 ·
Replies
19
Views
3K
Undergrad Can time be compressed without affecting distance?
  • · Replies 8 ·
Replies
8
Views
2K
High School Can Two Objects Exist in Each Other’s Past Simultaneously?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Clock Synchronization: Jack & Jill's View
  • · Replies 18 ·
Replies
18
Views
3K
Undergrad Time dilation of a rotating disk
  • · Replies 35 ·
2
Replies
35
Views
7K
Undergrad What Does Shankar Mean in Prof Shankar's Introduction to Relativity?
  • · Replies 6 ·
Replies
6
Views
2K
High School Zeno's arrow paradox and general relativity?
  • · Replies 21 ·
Replies
21
Views
5K
High School Magnitude of gravitational time dilation
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad Understanding Schutz's Geodesic Deviation Eq. 6.84
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Gradient one-form: normal or tangent
  • · Replies 8 ·
Replies
8
Views
3K
Graduate Can time be considered a direct function of movement?
  • · Replies 37 ·
2
Replies
37
Views
6K
Undergrad Moving Clock: Lorentz Factor Calculation
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Relativistic doppler shift and radar
  • · Replies 5 ·
Replies
5
Views
3K
Undergrad Why would we need faster than light travel?
  • · Replies 45 ·
2
Replies
45
Views
5K
High School Object A is moving relative to O , what does it mean?
  • · Replies 3 ·
Replies
3
Views
4K
Undergrad Einstein's Train: Does Speed Exceed c?
  • · Replies 4 ·
Replies
4
Views
2K
High School How Planetary Bodies Affect Space Time
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Special relativity: frames of reference
  • · Replies 12 ·
Replies
12
Views
2K
High School Ideal demonstration of time dilation
  • · Replies 24 ·
Replies
24
Views
3K
Undergrad Radial Proper Dist. Objects Free Fall: Calculating Δs
  • · Replies 7 ·
Replies
7
Views
2K
Graduate The formation of the event horizon.
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad What is Einstein's equation used for?
  • · Replies 7 ·
Replies
7
Views
3K
High School Charged Black Hole Hawking Radiation: Answers to Questions
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Myths of Modern Popular Physics
  • · Replies 13 ·
Replies
13
Views
2K
Undergrad Question about deriving E=mc^2
  • · Replies 22 ·
Replies
22
Views
3K