Special and General Relativity Forum

Graduate Lorentz invariance of action derivation

Graduate Einstein again +, on large scale.

Graduate Time dilation in a moving frame striking two synchronized clocks

Graduate A basic question in general relativity

Undergrad Why is the speed of light squared in E=mc², and does a train's mass square at light speed?

Graduate How can time dialation cause gravity?

Graduate Can you go back in time without undoing all your past interactions with matter?

Graduate Experimental measurement of Einstein's Field Equations

Graduate What is the gravitomagnetic effect from mass flow?

Undergrad Time Dilation on a Merry Go Round

Graduate Newtonian description of Gravitational Potential Energy

Graduate Why do massless objects travel at c?

Graduate Raising and lowering indices of partial derivative

Graduate Is There a Logical Derivation for Einstein's Field Equations?

Graduate How Does Velocity Affect Time Dilation in Special Relativity?

Graduate Is it possible to see at high speeds?

Graduate Questions about gravity at relativistic velocities

Graduate Determining the density of a singularity

Graduate Does light traveling at constant velocity mean space is filled with vacuum?

Graduate How Fast Does Time Elapse for Us From a Photon's POV?

Graduate The static Killing vectors in Kruskal coordinates

Graduate Solving the Curved Space Puzzle: e or c?

Graduate Superluminal Frame Adjustments?

Undergrad Relativistic Energy of a Ball: Understanding the Equivalence of Mass and Energy

Undergrad I've gone faster than the speed of light, havent you?

Undergrad The Fascinating Movement of Andromeda Galaxy: Impact on Mass and Time?

Graduate Is symetry across inertial frames purely theoretical?

Graduate Symmetrical twin paradox with opposite acceleration

Graduate Energy discrepencies depending on frame of reference

Graduate Energy Conservation and Expansion of Space: A Thought Experiment

Undergrad How Does Bert Experience Time Differently While Traveling to Alpha Centauri?

Graduate Can spacetime be manipulated if it's not made of energy?

Graduate Kronicker Delta, Levi-Civita, Christoffel and tensors

Graduate Why is the measure and finititude of c critical?

Graduate E=mc^2 can C^2 be described as a physical process?

Undergrad Does accelerating expansion affect the passage of time?

Graduate What is the relationship between speed and coordinates in general relativity?

Graduate Drawing Spacetime Diagrams: Quick Solutions

Graduate Some Thought Experiments (simple ones)

Graduate Divergence theorem in curved space

Graduate Understanding Einstein Notation

Graduate How does the Stress Energy tensor relate to Noether's theorem?

Graduate Why does T^{α μ λ}A_μC_λ^γ = D^{γ α} represent 16 equations?

Graduate FRW dust solution with flat spatial hyperslices

High School Source of Gravity: What Causes Attraction Between Masses?

Graduate How much is Special Relativity a needed foundation of General Relativity

Undergrad Bullet from a moving train kinda

Graduate Computing Christoffel symbols, Riemann and Ricci tensors

Graduate Trying to understand Special Relativity

Graduate Deriving Bending of Light from Maxwell's Equations

Graduate Error in special relativity Albert Einstein assumed

Graduate Divergence of product of killing vector and energy momentum tensor vanishes. Why?

Graduate How Do Geometric Shapes Influence the Path of Gravity?

Graduate Four vectors in complex notation

Graduate Can Rest Energy be Derived from the Stress-Energy Tensor?

Graduate Violating the principle of relativity

Graduate Calculating Four-Velocity and Four-Momentum Using Schutz's Method

Graduate Tensor operations, Maxwell's field equations

Graduate Printing mistake in A First Course in General Relativity?

Graduate Why does a perturbed geodesic obey the geodesic equation?

Graduate General Relativity - gravity self coupling

Graduate Where does all this spacetime curvature come from?

Graduate Is black hole collapse stopped by zero point motion?

Graduate Length Contraction: Does Size Change Affect Density or Radiated Energy?

Graduate Why can't we use a photon's reference frame in relativity?

Graduate Arbitrariness in Special Relativity

Graduate The velocity of electron near speed of light?

Graduate Why do bounded coordinate derivatives prove geodesic completeness?

Graduate Show that the light velocity c is constant under Lorentz transformations.

Graduate Understanding solutions of GR

Graduate Time scales in Inertial Frames of Reference

Undergrad What is the difference between tensor indices positions?

Graduate An unusual view from Bridgman.

Undergrad How Does the Twin Paradox Affect Aging in Relativity?

Graduate Christoffel connection in Kaluza Klein Theory

Graduate Gravitational Wave Effect on Macroscopic Particles

Graduate What is Schutz's explanation for the space-time interval in general relativity?

Graduate Is Time Travel Comparable to Space Travel in Physics?

Graduate Circular Motion in SR/weak gravitational field limit

Undergrad Are photons affected differently by gravity?

• Poll

High School Special Theory of Relativity paper

Graduate Relativity of simultaneity implies a universe for each reference frame?

Graduate Relativistic Lagrangian of a Free Particle

Graduate How Can a Rocket Travel Faster Than the Speed of Light?

Graduate Neutral particle falling into a black hole

Graduate Does Energy Density Affect Gravitational Field Strength?

Graduate Does light travel at different speeds for different observers?

Undergrad Understanding Emergent Gravity & Spacetime: Resources for Laypeople

Graduate Time Dilation equation questions

Graduate Why does Andromeda collide with us if galaxies recede from us?

Graduate Energy-Momentum Equation of a Particle

Graduate How do gravitons relate to spacetime curvature in general relativity?

Graduate Hulse-Taylor versus Pluto-Charon

Graduate Get Advice on Publishing Physics Proof on Gravitational Time Dilation

Graduate Speed of light or speed of time?

Graduate Supplementary Reading for First GR Course: Schutz vs Hartle?

Graduate Electromagnetism, Relativity, Force, Space ?

Graduate C according to what reference frame?

Undergrad Orbiting around an object of variable mass