Special and General Relativity Forum

Graduate Dust filled universe but dust is a real field.

Graduate Does time dilation between two planets equal the sum of each planet's effect?

Graduate The photon gas in the curved space

Graduate Relativistic Boat: Does It Float or Sink?

Graduate Can a black hole physically rotate if the singularity has zero volume?

Graduate Where s the moving train on the embankment?

Graduate Where to find additional tensor exercises and resources

Undergrad Weak and strong equivalence- what is the difference really?

Graduate Pendulum period in a gravity clock for moving and stationary observers

Graduate Multibody system in general relativity

Graduate Relativistic scattering Lab and CM frames

Graduate Questions About Absolute/Relative Velocity and Time

Graduate Why does the thrown clock show less time if geodesics maximize proper time?

Graduate Does spacetime cause inertia if the universe's average matter density is infinitesimal?

Graduate Why does Doppler shift depend on atom mass in recoil calculations?

Graduate Lorentz contraction of a light pulse

Undergrad Does a target move while light travels toward it?

Graduate Does light have a frame of reference and can distance change faster than c?

High School Seriously, why can't I go faster than the speed of light?

Undergrad Why does a travelling twin age slower but not get shorter?

Graduate Twin Paradox: Can Barbara Reach XEON Alive?

Graduate Gravitons are still theoretical, of course, but I'm not quite sure how

Graduate How Does the Curvature of Space Affect Our Perception of Gravity?

Graduate Hilbert's Derivation of Field Equations?

Graduate Derivation step in The Essential Einstein page 11

Graduate Relativistic velocity limitations

Graduate Gravitational Waves and the Role of Photons in LIGO

Undergrad Acceleration and time question

Graduate Einstein equation point mass solution

Graduate Does lowering indices on Lambda equal partial derivatives of covariant coordinates?

Graduate Singularities in colliding black holes

Graduate Unravelling Metrics of Spacetime

Graduate Deriving Equations for Light Sphere in Collinear Motion - O and O' Observers

Undergrad Why does time pass differently on a fast spaceship in special relativity?

Graduate Thoughts about Causality and Paradoxes

Graduate Uniform background dust of plank mass black holes.

Undergrad Thought experiment about Simultaneity

Graduate Where did Einstein say :mass curve space/time ?

Graduate Time dilation and space travel

Graduate Wormhole time travel: would Earth stay young while the Sun ages?

Graduate Relativistic gravity incomplete? Big Bang singularity

Graduate Is Faster than Light travel impossible?

Undergrad Would we as humans ever be able to travel close to the speed of light?

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Graduate GR in a universe without matter or energy

Graduate 2 black holes, 2*M -> 1 b.h., 2*M - f*2*M?

Undergrad Solving Velocity Addition Formula: 0.75c+0.75c = 0.96c

Undergrad What is the Lorentz contraction equation for bodies at relativistic speeds?

Graduate Question about Schwarzschild radius

Graduate Relativity and Spatial Dimension

Graduate How would you calculate how bodies curve space/time?

Graduate Einstein and idea that nothing can travel faster than the speed of light

Undergrad Why does a proton have more energy at high velocity if E=mc² gives a constant?

Graduate Does time slow down for travelers moving at the speed of light?

Graduate Absolute zero and hot in respect to time dilation

Graduate How do you derive Einstein's field equations?

Undergrad Light, dielectric medium, c, wavelength

Graduate General Relativity look at backwards.

High School Understanding Special Relativity: A Simple Explanation for KS3 Students

Graduate Gravitational vs geodesic proper time

Graduate Differences in Newtonian and Relativistic predictions of gravity

Graduate Increase in spin rate as object collases to black hole

Graduate Dificulty with Einstein's derivation of TAO

Graduate Formulation of Einstein-Hilbert Action

Graduate Writing the EFE in a different form

Graduate There is a mistake in relativity.

Graduate Sun Vanishes - How Long Till Orbits Change?

Graduate How little does a hydrogen atom curve space?

Graduate Is Lorentz Contraction Indistinguishable from Standard Relativity?

Undergrad Why does velocity change matter in the twin paradox?

Graduate Can you scoop out part of a black hole?

Graduate Understanding Einstein's Twin Paradox, past the usual level?

Graduate Zeno's Paradox Applied to Physics: Can Object B Catch Up?

Graduate Relativistic Rotation: Does v=rω?

Undergrad Object's mass does not increase as it approaches the speed of light?

Undergrad Does gravitational force continue indefinitely with distance?

Graduate Understanding Curvature Perturbation in Cosmology

Graduate Why does the equivalence principle only hold at a single point?

Graduate Relativity through different scales

Graduate Is the Cosmological Constant the Same as Dark Energy?

Undergrad Electric field and light and stuff

Graduate Physical meanings of universal coordinates in schwarzschild metric

Undergrad Mass at equator versus mass at pole

Graduate Experimental sticky (Hafele-Keating experiment)

Graduate False twin paradox with inertial substitute observer

Graduate Rotation and Minkowski diagrams.

Graduate Evotos Experiment: Equator vs. 45° Latitude

Graduate I am having troubles with the gravitational time dialtion equation.

Graduate Time and the relative speed of an Expanding Universe

Graduate Issues with Eddington-Finkelstein Coordinates

Graduate Why Does Rotating the Minkowski Metric Yield Non-Zero Curvature Components?

Graduate Why is the relativistic Lagrangian for a free particle proportional to 1/\gamma?

Undergrad The aether was a flawed experiment?

Graduate In 4-D, the Earth orbits around the sun in a straight line

Graduate Why FTL travel of light spot can't carry any information?

Graduate By photon's POV, would light travel infinity in no time?

Undergrad Units in E=mc² when mass is given in Newtons

Graduate Why Hawking radiation contains other particles besides photon?

Graduate Relativity Questions on Motion Limits

Graduate Is time dilation just an illusion caused by light travel delays?