Special and General Relativity Forum

Graduate An Easy Metric for Einstein Field Equations

Undergrad Does time dilation formula being close to 1 mean time has slowed?

Graduate Commuting the Lorentz transformation with derivative

Graduate Living Beyond Possible: Could I Age Less Than Earth?

Graduate How to send a faster-than-light signal (spot Paradox)?

Graduate Are All Black Hole Singularities Actually One and the Same?

High School What is SPEED OF LIGHT With Respect to an Observer?

Graduate Is the phase of a wave an invariant quantity in relativity?

Graduate What is the EM Lagrangian in curved spacetime?

Graduate The Center of a Black Hole - What's Going On?

Undergrad How can black holes have mass and matter if they are finite points?

Graduate How to measure the one way speed of light.

Graduate Is the Gauge Theory of Gravity Equivalent to Conservation Laws?

Graduate Wrong example of Covariant Vector

Graduate Hawking Radiation seems contrary to black hole dynamics

Graduate Foliation of Space Time Hypersurfaces

Graduate Twin paradox initial acceleration

Graduate Is the Discussion on Gravitomagnetic Moments in London Misleading?

Graduate How does beaming affect distance perception in special relativity?

Undergrad Why did Michleson assumed that ether is moving ?

Graduate Understanding Charged Black Holes

Graduate How can two distant objects influence each other at a distance

Graduate Relative Information and Time Paradox?

Graduate Traveling at c-(1 planck length/planck time), then accelerate. What happens?

Graduate Aberration of starlight due to

Graduate Holographic principle and entropy mapping of a BH

Graduate Speed of light in media other than vacuum

Graduate What is the physical interpretation of four-velocity in special relativity?

Graduate MMX and the earth's rotational sagnac

Graduate Can different paths in spacetime have the same separation?

Graduate From Equivalnce Principle to General Relativity

Graduate Notational conventions and their mathematical consequences

Undergrad Possible error in Wikipedia's time dilation article

Graduate Can the Symmetric Twin Paradox be Tested with Atomic Clocks?

Graduate Magnetic or Electric Field or Electromagnetic Field?

Graduate How to make two frames purely Galilean

Graduate Is time in our universe absolute?

Graduate Derivation of eq of motion of q in static E?

Undergrad Interacting gravitational fields

Graduate Could the curvature of space in general relativity represent a 4th dimension?

Undergrad Could you use contained light as a form of propulsion?

Graduate Time dilation in a spaceship orbiting Earth at near-light speed

Graduate Space-Time Puzzle: Why Objects Can't Be in Two Places at Once

Undergrad Testing whether gravity bends light

Graduate Calculating Ship Acceleration with Gauss Gun Propulsion

Graduate Does gravitational potential energy increase effective mass?

Graduate How can bike wheels make the same turns at 0.866c with length contraction?

Undergrad Does the equivalence principle account for Doppler and gravitational redshift?

Graduate Killing vectors on a 3D Euclidean space

High School How do objects know which is larger to attract accordingly?

Graduate Solving Einstein Field Equations for Minkowski Space with CTC

Undergrad Faster-than-light newbie question

Graduate Relativity of simultaneity in Greene's train thought experiment

Graduate Important and/or Interesting Spacetimes

Graduate Question about black holes and gravity

Graduate Relativistic inelastic collisions?

Graduate Does time dilation occur even in our everyday movements?

Undergrad Why do we need gravitons if gravity comes from accelerated frames?

Graduate Can a light beam stay trapped in a moving cart with ideal mirrors indefinitely?

Undergrad Does the spring constant k change in a moving reference frame?

Graduate How does the String Theory Propeller behave as you approach the event horizon?

Undergrad Gravity - a function of mass or of density?

Graduate Is There a Discrepancy in Distance Measurements?

Graduate If Two Spaceships close at a speed of 1.4c ?

Graduate What is the relationship between 4-momentum and energy/momentum components?

Graduate What is 'Curvature' of Spacetime

Graduate Length and time comparisons in SR

Graduate Penrose-Carter diagrams of various spacetimes

Undergrad Link between Thermo and Special Rel?

Undergrad Can Two Events Be Simultaneous in Multiple Reference Frames?

Graduate Metric tensor of a non-homogeneous universe

Graduate Need simple introduction to homology / cohomology theory

Graduate The feeling of time while traveling at the speed of light

Graduate Rotating vs. Stationary Mass Grav Effects?

Graduate How Does Gravity Affect Time and Distance in Space Travel?

Graduate Einstein-scalar field action -> Einstein-scalar field equations

Graduate Covariant derivative in spherical coordinate

Graduate How does length contraction apply to the distance between two photons?

Graduate Gravitational waves due to acceleration

Undergrad Can Gravitational Force Depend on Medium Like Electric Force Does?

Graduate Michelson–Morley experiment using objects with mass?

Graduate What Happens to Light Between Two Colliding Black Holes?

Graduate A study of the motion of a relativistic continuous medium

Graduate Phase velocity versus group velocity in superluminal pulse experiments

• Poll

Graduate Curved or non-curved space, what is more fundamental?

Graduate Do photons in a beam move at light speed relative to each other?

Graduate Gravity time dialation and acceleration?

Graduate Length contraction and time dilation equivelant?

Undergrad Does energy has gravitational force?

Graduate Source of Gravitational Energy

Graduate Lorentz tranformations and time slices

Graduate Why do both object and lightbulb see each other's time running 2× slower at 0.866c?

Graduate How Does Velocity Influence Energy Perception in Physics?

Graduate What Happens to Time Dilation at a Black Hole's Event Horizon?

Graduate What General Relativity Project Should I Undertake to Enhance My Knowledge?

Graduate Using GnuPG for encrypted communication on Physics Forums

Undergrad Can massless or near-massless particles move and accelerate?

Graduate What Is the Shortest Path on a Sphere If Not a Line of Latitude?

Graduate Why is There No Universal Space? - Henrik's Questions

Graduate Gravity and Mass: What's the Need for a Graviton?