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 Thought Experiment on the speed of light
  • · Replies 5 ·
Replies
5
Views
5K
Graduate Explaining the Grand Design: Time & Change without Time
  • · Replies 31 ·
2
Replies
31
Views
6K
Graduate Can Energy Really Exist on the Surface of a Black Hole?
  • · Replies 49 ·
2
Replies
49
Views
10K
Graduate Table of Connection Coefficients
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Varying Gravitational Field - Invariant Tetrahedron?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Downloading e-books makes Kindle heavier?
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Debunking the Myth: The Truth About Black Holes and Accelerated Particles
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Question about FTL travel vs. FTL acceleration
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Can special relativity result in alternative realities?
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Visual effects of SR versus GR
  • · Replies 5 ·
Replies
5
Views
2K
Graduate What does it mean to move through time?
  • · Replies 19 ·
Replies
19
Views
7K
Graduate Gravity Effects on Rod Length - Reference Sources
  • · Replies 52 ·
2
Replies
52
Views
9K
Undergrad Needing a basic clarification with SR
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Solving Problems with Tensor in 2+1 Dimensions
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Einstein's relativity proves caloric theory?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Explaining Mass Increase Outside of Relativity: The Role of Internal Resistance
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Twin paradox: who decided who is the younger one
  • · Replies 62 ·
3
Replies
62
Views
13K
Graduate Time Dilation and Length Contraction near the Event Horizon of a BH
  • · Replies 33 ·
2
Replies
33
Views
9K
Graduate I require the assistance of a physicist.
  • · Replies 14 ·
Replies
14
Views
2K
High School Breaking Light: Can You Outrun the Speed of Light?
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Comparing Gravity in Newtonian and Relativistic Frameworks
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Relativity Theory: Connecting Gravitational & Velocity Time Dilation
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Wgat would a light clock measure in free fall?
  • · Replies 11 ·
Replies
11
Views
4K
Graduate What energy term determines gravity in GR?
  • · Replies 7 ·
Replies
7
Views
3K
Graduate Momentarily Comoving Reference Frame
  • · Replies 4 ·
Replies
4
Views
8K
Graduate Gamma5 x d^2 Lorentz invariant?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Coordinate change to remove asymptotic geodesic?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Alternative way to calculate the special relativistic time dilation factor
  • · Replies 28 ·
Replies
28
Views
7K
Graduate Galilean Transformation Limitations: Explained w/ Example
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Problem Landau relativity special
  • · Replies 3 ·
Replies
3
Views
3K
Graduate What is the need for KK-theories (and similar)
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Geometric representation of two-forms.
  • · Replies 9 ·
Replies
9
Views
2K
Graduate Observing Light Flash from 0.9999c Moving Body
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Questioning speed of light and infinite mass
  • · Replies 9 ·
Replies
9
Views
4K
Graduate Inertial frame of reference of light speed (And beyond)
  • · Replies 12 ·
Replies
12
Views
3K
Graduate GPS & Relativity: Position Error Lower Than 38000 Feet?
  • · Replies 60 ·
3
Replies
60
Views
14K
Graduate Question about viewpoints in relativity
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Time dilation and relative velocity
  • · Replies 19 ·
Replies
19
Views
4K
Graduate Symmetry assumption in derivation of SR
  • · Replies 9 ·
Replies
9
Views
4K
Graduate Is this a legitimate derivation of the changing of mass?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate On the Reissner-Nordstrom Metric
  • · Replies 22 ·
Replies
22
Views
7K
Graduate Family of nested spheres in Schwarzschild spacetime
  • · Replies 1 ·
Replies
1
Views
2K
High School Real life examples of simultaneity
  • · Replies 115 ·
4
Replies
115
Views
23K
Graduate Mass-less particles? How can that be?
  • · Replies 30 ·
2
Replies
30
Views
6K
Graduate How does SR apply to rotating bodies?
  • · Replies 5 ·
Replies
5
Views
3K
Graduate I don't understnad how to get the 4-volume element for a Minkowksi space
  • · Replies 4 ·
Replies
4
Views
7K
Graduate Spinning mass & spatial distortion
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Einstein Field equations for dummies
  • · Replies 2 ·
Replies
2
Views
4K
Graduate Spinning Mass & Spatial distortion
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Photon, Lagrange Point, Binary Black Hole
  • · Replies 7 ·
Replies
7
Views
6K
Graduate Lorentz Transformations and Photon Delay
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Is there a spacetime which is timelike and spacelike complete but null
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Speed of light measurements using different light source.
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Can Moving a Hydrogen Atom by an Angstrom Alter Its Mass?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate What is the relativistic cause of planetary orbital rotation.
  • · Replies 16 ·
Replies
16
Views
5K
Graduate Which principle would be violated?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Understanding the Trace of the SEM Tensor
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Einstein holding Maxwell's equations above Newton's equations
  • · Replies 26 ·
Replies
26
Views
12K
Graduate Could GPS satellites be used to detect gravitational waves?
  • · Replies 2 ·
Replies
2
Views
4K
Graduate Equivalence principle and gravitational neutron diffraction
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Why Is the tt Component of the Metric Interpreted Differently in This Paper?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Perturbative Construction of General Relativity
  • · Replies 1 ·
Replies
1
Views
2K
High School Do not understand why 'c' is squared in Einstein's equation
  • · Replies 7 ·
Replies
7
Views
4K
Graduate How Do Black Holes Form from Space-Time Curvature?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Did Einstein Have Multiple Definitions of Time?
  • · Replies 28 ·
Replies
28
Views
26K
Graduate Maxwell's Equations in a Medium
  • · Replies 71 ·
3
Replies
71
Views
18K
Undergrad Why doesn't light get absorbed?
  • · Replies 3 ·
Replies
3
Views
4K
Undergrad Do Photons Have Mass and Momentum?
  • · Replies 170 ·
6
Replies
170
Views
25K
High School Why Does Gravity Pull Objects Together?
  • · Replies 75 ·
3
Replies
75
Views
53K
Graduate A question regarding Special Relativity.
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Can the Universe Travel Faster Than Light and Time Travel?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Can matter and anti matter manipulation be used for replication of
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Can two stationary electrons generate a magnetic field?
  • · Replies 7 ·
Replies
7
Views
3K
Undergrad What does time mean at t=1/infinity?
  • · Replies 8 ·
Replies
8
Views
4K
Graduate The crossing of two light waves, a point standing still ?
  • · Replies 16 ·
Replies
16
Views
4K
High School Is Time Travel Possible with Speed of Light?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Is There Research on Spacetime Elasticity and Its Relationship with Mass?
  • · Replies 7 ·
Replies
7
Views
6K
Undergrad Does Traveling Affect Age? A Thought Experiment
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Can Neutrinos Travel Faster thyan Light?
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Fourier transform in Minkowski space
  • · Replies 6 ·
Replies
6
Views
8K
Graduate The Schwartzschild solution - why no Stress Tensor?
  • · Replies 51 ·
2
Replies
51
Views
9K
Graduate Communicating Through an Einstein-Rosen Bridge Without Causality Violation
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad Potential energy contributes more to gravity
  • · Replies 12 ·
Replies
12
Views
3K
Graduate Question on Time Dilation for Traveling Observers
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Why Does Lorentz Transformation Not Yield the General Form of Four-Acceleration?
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad Verifying Time Dilation, Length Contraction & Space-Time Curvature
  • · Replies 27 ·
Replies
27
Views
5K
Graduate Questions about photons. Their interaction with time and their life-cycle.
  • · Replies 8 ·
Replies
8
Views
3K
Graduate Speed of Light and Relativity of simultaneity
  • · Replies 10 ·
Replies
10
Views
5K
Graduate What Are the Limits of Acceleration and Energy in Relativity?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Michelson-Morley experiment, a pointless exercise when taking SR into account ?
  • · Replies 11 ·
Replies
11
Views
3K
Graduate What is Waving in Light Waves?
  • · Replies 7 ·
Replies
7
Views
3K
Graduate Question on The Dichotomy Paradox
  • · Replies 3 ·
Replies
3
Views
3K
Graduate I have a crude understanding of dark energy and the relativist universe.
  • · Replies 16 ·
Replies
16
Views
3K
Undergrad Energy of photon never becomes zero
  • · Replies 10 ·
Replies
10
Views
4K
Undergrad Can the change in energy change the mass?
  • · Replies 13 ·
Replies
13
Views
4K
Graduate Time Dilation: Two Observers, Different Times
  • · Replies 6 ·
Replies
6
Views
2K
Graduate My understanding of Space, Time and spacetime
  • · Replies 61 ·
3
Replies
61
Views
11K
Graduate Newton's 3rd Law & Acceleration Paradox
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Conservation of momentum question
  • · Replies 8 ·
Replies
8
Views
3K
Graduate How can a metric connection have torsion?
  • · Replies 11 ·
Replies
11
Views
5K