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 Invariance of spacetime interval
  • · Replies 10 ·
Replies
10
Views
6K
Undergrad Are Gravity Waves Rare? Understanding the Elusive Phenomenon
  • · Replies 8 ·
Replies
8
Views
3K
Graduate Is the tensor product T^ab T_ab non-negative?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate What happens to a laser pulse that is beamed through a gravity well?
  • · Replies 12 ·
Replies
12
Views
3K
Graduate Lagrangian equation in special relativity
  • · Replies 2 ·
Replies
2
Views
3K
Graduate What Is Gravity and How Does It Relate to Space-Time and Mass?
  • · Replies 16 ·
Replies
16
Views
3K
Graduate Do Falling Particles in Schwarzschild Solution Radiate?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Travelers Live Longer: Proven by Physics
  • · Replies 16 ·
Replies
16
Views
8K
Graduate Is there a true singularity in nature?
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Can one determine that an instrument is an accelerometer locally?
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Density in the friedmann equation
  • · Replies 7 ·
Replies
7
Views
3K
Graduate Obtaining the Metric in a Boosted Observer Frame?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Possible to adjust light with magnetic field?
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Derivation of classical limit in c = 1 units (i.e. without cheating)
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Self-rotating body with speed of light
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Gravitational Wave Detection: Understanding Interferometers
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Help with understanding Minkowski diagrams
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Rectilinear vs Curvilinear Motion: Explained
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Describing 4-vectors in space-time
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Mass Increase When Moving at Speed of Light?
  • · Replies 11 ·
Replies
11
Views
3K
Graduate 'Direction' of space-time curvature ?
  • · Replies 9 ·
Replies
9
Views
3K
Graduate How Does Changing Velocity Affect Inertial Frame Transformations?
  • · Replies 12 ·
Replies
12
Views
3K
Graduate Length contraction and the direction of motion
  • · Replies 7 ·
Replies
7
Views
4K
Graduate Opposite beams of photons or electrons
  • · Replies 4 ·
Replies
4
Views
2K
Graduate A non-inertial frame is non-inertial with respect to what?
  • · Replies 7 ·
Replies
7
Views
3K
Graduate What Happens to Rest Mass Objects from a Photon’s Perspective?
  • · Replies 10 ·
Replies
10
Views
3K
Undergrad Travel time for a space ship at relativistic speeds
  • · Replies 7 ·
Replies
7
Views
8K
Undergrad Is Velocity Constant in the Instantaneous Rest Frame?
  • · Replies 3 ·
Replies
3
Views
7K
Graduate Special relativity: local frames versus global frame in a loop scenario
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Should a stationary charge on the earth radiate?
  • · Replies 12 ·
Replies
12
Views
4K
Graduate Can Black Holes Actually Die Out?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Question re: time dilation equations
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Information Transfer and the speed of light
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Spacelike and Timelike singuralites
  • · Replies 2 ·
Replies
2
Views
5K
Undergrad Einstein relativity- radiowaves when travelling at v>0.1c
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Laps and Shift Function: Understanding the Role of t^a in Wald's GR Book (p.255)
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Faster than speed of light spaceship.
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Question about derivation of surface gravity of a black hole
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Faster than light / compress space
  • · Replies 9 ·
Replies
9
Views
7K
Graduate Weyl Tensor Components in n-Dim Manifold: N=3?
  • · Replies 5 ·
Replies
5
Views
8K
Graduate Gravitational time dilation, redshift and doppler
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Twin Paradox (by acceleration)
  • · Replies 51 ·
2
Replies
51
Views
9K
Graduate Riemann tensor: indipendent components
  • · Replies 5 ·
Replies
5
Views
4K
Graduate Derivation of Proper Time and Proper Space
  • · Replies 17 ·
Replies
17
Views
7K
Undergrad Why can't we see the light before we turn on the bulb?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Topography of spacetime over time.
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad Can Two Spaceships Perceive Faster-Than-Light Speeds Relative to Each Other?
  • · Replies 12 ·
Replies
12
Views
3K
Undergrad What is Albert Einstein's Theory of Spacetime?
  • · Replies 2 ·
Replies
2
Views
2K
High School What does E=mc^2 mean? How can it be used in an example?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Is acceleration relative? (In the same way that velocity is)
  • · Replies 32 ·
2
Replies
32
Views
8K
Graduate Does an object's mass truly increase with velocity due to kinetic energy?
  • · Replies 8 ·
Replies
8
Views
3K
Graduate Light speed thought experiment
  • · Replies 10 ·
Replies
10
Views
3K
Graduate Does compressing a mass to a smaller sphere change the curvature of space?
  • · Replies 11 ·
Replies
11
Views
4K
Graduate How Does Relativity Explain Light Behavior When Fired from a Moving Spacecraft?
  • · Replies 8 ·
Replies
8
Views
3K
Undergrad Time Dilation: 1.25yr Trip at 2.40x10^8m/s
  • · Replies 12 ·
Replies
12
Views
3K
Graduate Mach's Principle: Right or Wrong?
  • · Replies 37 ·
2
Replies
37
Views
7K
Undergrad Do Gravitating Bodies Warp the Fabric of Space?
  • · Replies 80 ·
3
Replies
80
Views
11K
Graduate How come massless photon has energy
  • · Replies 17 ·
Replies
17
Views
6K
Graduate Conformal Spacetime: Paths of Photons & Massive Particles
  • · Replies 3 ·
Replies
3
Views
4K
Undergrad Layman in search of help understanding relativity
  • · Replies 21 ·
Replies
21
Views
4K
Graduate Confused about Euler-Lagrange Equations and Partial Differentiation
  • · Replies 6 ·
Replies
6
Views
2K
Graduate How Does Zero Acceleration in One Frame Manifest as Nonzero in Another?
  • · Replies 19 ·
Replies
19
Views
10K
Graduate Can you be in stable orbit inside a blcak hole?
  • · Replies 26 ·
Replies
26
Views
5K
Graduate Absolute light speed or velocity or both?
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Time dilation where there is no net gravity?
  • · Replies 9 ·
Replies
9
Views
3K
Graduate Gravitational Waves: Do They Bend Like Light?
  • · Replies 14 ·
Replies
14
Views
3K
Graduate Different acceleration in an accelerating rocket?
  • · Replies 16 ·
Replies
16
Views
4K
Undergrad In Ensteins theroy of gravity.when a cannon ball is fired up,it
  • · Replies 43 ·
2
Replies
43
Views
6K
Graduate Einstein's Field Equation: 4D Spacetime & Cosmological Constant
  • · Replies 6 ·
Replies
6
Views
6K
Graduate Can You Get a Cosmic Tan from Lights Across the Universe?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Straight line through spacetime.
  • · Replies 58 ·
2
Replies
58
Views
9K
Graduate Torsion and the conservation of angular momentum
  • · Replies 12 ·
Replies
12
Views
4K
Graduate A clever cosmologist refutes relativity
  • · Replies 29 ·
Replies
29
Views
4K
Graduate Relativistic Momentum: Please help me to see that it is conserved.
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Relativistic Effects: When to Consider v/c Ratios
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Why isn't the Cotton tensor identical zero?
  • · Replies 5 ·
Replies
5
Views
4K
Graduate How can we use differential geometry to improve our understanding of SR?
  • · Replies 28 ·
Replies
28
Views
6K
Graduate Motion and the Warping of Space
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Relative speed of light paradox
  • · Replies 17 ·
Replies
17
Views
5K
Undergrad Relativity & Heat: Does Speed Increase Heat Needed?
  • · Replies 1 ·
Replies
1
Views
1K
  • Poll Poll
Graduate Gravity speed vs light speed experiment
  • · Replies 39 ·
2
Replies
39
Views
9K
Graduate Acceleration inside an event horizon
  • · Replies 15 ·
Replies
15
Views
5K
Graduate A ambiguous variation of Einstein-Hilbert action
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Length contraction (objects & space or objects only)
  • · Replies 10 ·
Replies
10
Views
5K
Graduate Time Dilation/Proper Time Question
  • · Replies 17 ·
Replies
17
Views
13K
Graduate Vacuum solutions, and Explicit source terms
  • · Replies 8 ·
Replies
8
Views
3K
Graduate Trying to understand linear frame dragging
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Derivation of Relativistic Momentum
  • · Replies 6 ·
Replies
6
Views
9K
Graduate Why is charge/current density 4 vector a twisted differential 3-form?
  • · Replies 2 ·
Replies
2
Views
5K
Graduate Compact support of matter fields
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Raychaudhuri equation in Jacobson's paper (gr-qc/9504004) ?
  • · Replies 2 ·
Replies
2
Views
3K
Graduate The speed of light and time dilation
  • · Replies 12 ·
Replies
12
Views
15K
Graduate Conservation of momentum a universal truth
  • · Replies 33 ·
2
Replies
33
Views
5K
Undergrad How does motion affect the potential energy of a spring?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Relativistic centripetal force
  • · Replies 195 ·
7
Replies
195
Views
31K
Graduate Need help explaining light speed limit to younger brother
  • · Replies 28 ·
Replies
28
Views
4K
Undergrad Challenge to the 1st postulate
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Pound-Rebka Experiment: Understanding Gamma Ray Detection & Doppler Effect
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Struggling with the relationship between the Lagrangian L and the interval ds?
  • · Replies 4 ·
Replies
4
Views
4K
Graduate Can Fermat's principle be applied to gravitational lensing?
  • · Replies 11 ·
Replies
11
Views
5K