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 Defining Spacetime Coordinates
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Why is B's clock in advance instead of A's?
  • · Replies 8 ·
Replies
8
Views
3K
Undergrad Gravitational Waves: Questions from Josh on Mass & Space-Time
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Conservation of matter energy momentum tensor beyond GR
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Understanding Falling with Horizontal Velocity
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad Does time dilation cause the speed of light to be invariant?
  • · Replies 50 ·
2
Replies
50
Views
6K
Undergrad Geometric Interpretation of Einstein Tensor
  • · Replies 9 ·
Replies
9
Views
3K
Undergrad Conditions necessary for a human to survive event horizon
  • · Replies 28 ·
Replies
28
Views
6K
Undergrad Gravitational wave time variation
  • · Replies 49 ·
2
Replies
49
Views
5K
Undergrad Solving Determination of Locally Inertial Coordinates
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Proving Killing Vector of Static Spacetime - David
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Solving General Relativity's Schwarchzild & FRW Metrics
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad How can we visualize spin being invariant?
  • · Replies 11 ·
Replies
11
Views
2K
Undergrad Time in gravitational reference frame?
  • · Replies 43 ·
2
Replies
43
Views
5K
Undergrad Einstein's E=mc^2 equation -- question....
  • · Replies 11 ·
Replies
11
Views
2K
Undergrad Relativistic Kinetic Energy Derivation
  • · Replies 22 ·
Replies
22
Views
5K
Undergrad What is the source of curvature in an accelerating frame?
  • · Replies 30 ·
2
Replies
30
Views
5K
Undergrad Do the Energy-Momentum Transformations apply to Photons?
  • · Replies 32 ·
2
Replies
32
Views
9K
Undergrad Time Dilation in Hypothetical Faster-than-Light Travel
  • · Replies 6 ·
Replies
6
Views
3K
Undergrad Special theory of relativity argument
  • · Replies 21 ·
Replies
21
Views
3K
Undergrad Understanding Lorentz-Transformability & Invariant Operations
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad How Do Orbiting Black Holes Generate Gravitational Waves?
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Relativistic Momentum: 880kg Spacecraft at 1/2 C
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad Relativistic Mass Oscillation & Gravitational Field at R
  • · Replies 5 ·
Replies
5
Views
1K
Undergrad Relativity of Simultaneity: An Overview
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Understanding the GR Twin Paradox: Explained in a Concise Video
  • · Replies 29 ·
Replies
29
Views
3K
Undergrad How Do Lorentz Transformations Affect Perceptions of Time and Distance?
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Earth as Inertial Ref. Frame: Test Relativity's Precision
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Lorentz Transformation: Writing in Different Forms
  • · Replies 5 ·
Replies
5
Views
1K
Undergrad Project Greenglow: Is Anti-Gravity Possible?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad How does a photon view the universe?
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Experiment to test the basic assumption of SR
  • · Replies 32 ·
2
Replies
32
Views
4K
Undergrad Relativity: Coming to Terms 1: Starting Assumptions
  • · Replies 17 ·
Replies
17
Views
3K
Undergrad Why Does Time Dilation Occur in the Light Clock Thought Experiment on a Train?
  • · Replies 28 ·
Replies
28
Views
3K
Undergrad What Actually is Length Contraction?
  • · Replies 15 ·
Replies
15
Views
2K
Undergrad Not understanding Hulse Taylor period shift calculation
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Momentum & Energy Correlation: Is it Valid?
  • · Replies 13 ·
Replies
13
Views
2K
Undergrad Non-relativistic limit of the Lagrangian
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Cartesian Coordinates Interpretation in GR?
  • · Replies 41 ·
2
Replies
41
Views
4K
Undergrad Is Gravity inertia, acceleration or curvature in GR?
  • · Replies 46 ·
2
Replies
46
Views
6K
Undergrad Relativity Theory: General & Special Contexts
  • · Replies 15 ·
Replies
15
Views
2K
Undergrad Shuttle Orientation in Orbit: A GR Perspective
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Can Anyone Help Understand Einstein's 1905 Derivation of E=mc^2?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Equivalent statements of the weak energy condition
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Confusion about Dual Basis Vectors: Why are these two relationships equal?
  • · Replies 14 ·
Replies
14
Views
3K
Undergrad Asymmetric Tensor: Overview & Uses
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Deriving the Lorentz formula from my own example
  • · Replies 57 ·
2
Replies
57
Views
5K
Undergrad Using the metric to raise and lower indices
  • · Replies 14 ·
Replies
14
Views
7K
Undergrad Dimension Check of Einstein's Field Equations
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Are there any alternative interpretations to GR?
  • · Replies 48 ·
2
Replies
48
Views
5K
Undergrad Velocity, Gravitational Pull & Creator's Movement: Relation?
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Solve Ra[bcd]=0: What Permutations Work?
  • · Replies 15 ·
Replies
15
Views
2K
Undergrad Independence of speed of light and velocity of source
  • · Replies 34 ·
2
Replies
34
Views
5K
Undergrad Do Event Horizons Really Exist?
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Reducing Riemann Components to 20 - Step-by-Step Guide
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Gravitational Waves & Gravitational Pull: Explored
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad Is the Linear Ehrenfest Paradox Accurate for Circular Motion?
  • · Replies 33 ·
2
Replies
33
Views
4K
Undergrad Calc Precession of Mercury Orbit: Stress-Energy Tensor=0?
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Solving Tangent Plane Approximation in Einstein Gravity
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Learn About Tensors: Simple Explanations & Examples
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Isolated/Closed Systems: Relativistic Thermodynamics Explained
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad What Causes Different States of Mass and Energy in E = mc²?
  • · Replies 23 ·
Replies
23
Views
3K
Undergrad LIGO and speed of propagation of gravity
  • · Replies 15 ·
Replies
15
Views
4K
Undergrad What Happens to Time in the Twin Paradox of Relativity?
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad What is the resolution to the problem with E cross B field and E>B?
  • · Replies 5 ·
Replies
5
Views
3K
Undergrad Did Scott Kelly age less than his twin, or more?
  • · Replies 12 ·
Replies
12
Views
2K
Undergrad Energy of a Rotating Binary system
  • · Replies 21 ·
Replies
21
Views
2K
Undergrad Why Does GR Not Allow Global Reference Frames?
  • · Replies 14 ·
Replies
14
Views
2K
Undergrad Special relativity thought experiment
  • · Replies 8 ·
Replies
8
Views
1K
Undergrad Do gravitational waves transmit energy in all cases?
  • · Replies 12 ·
Replies
12
Views
3K
Undergrad Gravitational Waves: Time, Synchronization, Speed
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Relativity & Uncertainty: Exploring the Impossible
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Twin Paradox Resolution -- Inertial frames
  • · Replies 46 ·
2
Replies
46
Views
6K
Undergrad Frame-Independent Set of Events?
  • · Replies 14 ·
Replies
14
Views
2K
Undergrad Effects of Stretching Space Time: Questions & Answers
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Does mass become infinite near the speed of light?
  • · Replies 60 ·
3
Replies
60
Views
17K
Undergrad Anthropic Lower Limit on Cosmological Constant
  • · Replies 0 ·
Replies
0
Views
1K
Undergrad Shooting Video on Planet Z Near a Black Hole
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Is Gravity Really the Weakest Fundamental Force?
  • · Replies 22 ·
Replies
22
Views
4K
Undergrad Travelling (at) the speed of light away from a lightsource
  • · Replies 6 ·
Replies
6
Views
1K
Undergrad Relativity of Simultaneity and Time
  • · Replies 45 ·
2
Replies
45
Views
5K
Undergrad Gravitational Wave Discovery & Einsteinian Gravity: What's the Connection?
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Why is microgravity experienced on the ISS despite the presence of gravity?
  • · Replies 47 ·
2
Replies
47
Views
7K
Undergrad Increase Mass/Energy of Stationary Spacecraft?
  • · Replies 14 ·
Replies
14
Views
2K
Undergrad Michelson-Morley Exp: Does this Paper Have Validity?
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Length Contraction: Lorentz vs Einstein Explained
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Gravity Wave Measurement: Measuring the Relative
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Hasn't Gravitational Lensing Already Proved Einstein? (LIGO)
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad Duration of recently measured gravitational waves
  • · Replies 22 ·
Replies
22
Views
3K
Undergrad Gravitational Lensing: The Impact of a Massive Earth
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Gravity Waves and Superposition?
  • · Replies 9 ·
Replies
9
Views
3K
Undergrad Relativity Q: Does Earthly Time Pass Slower to Outer Space Observers?
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad What Are Gravitational Waves and How Do They Work?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Writing an Abstract for Special Relativity: Tips & Tricks
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Acceleration without force is possible in relativity
  • · Replies 35 ·
2
Replies
35
Views
5K
Undergrad Special Relativity Books: An Illustrated Guide & Beyond
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Why does light Ray bend in accelerating elevator but not...
  • · Replies 28 ·
Replies
28
Views
6K
Undergrad Why can't Gravitational Accelerations vanish everywhere?
  • · Replies 69 ·
3
Replies
69
Views
6K
Undergrad Why is the medium in the Michelson Morley experiment ignored
  • · Replies 19 ·
Replies
19
Views
4K
Undergrad Electric Field of Moving Charge: Effects on Distance
  • · Replies 4 ·
Replies
4
Views
1K