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.
Threads
High School How does FTL travel violate causality if you only observe the past?
- sawtooth500
- · Replies 145 ·
Graduate Questions about Einstein's 1916 GR Paper: Answers Needed
- darockymn
- · Replies 1 ·
Graduate Minimal coupling in general relativity
- spaghetti3451
- · Replies 3 ·
Graduate Diffeomorphism invariance and gauge invariance
- spaghetti3451
- · Replies 2 ·
High School Are All Four GW Detectors Currently Operational for Simultaneous Observing?
- RockyMarciano
- · Replies 3 ·
High School Does Time Dilation Occur in a Perfectly Circular Orbit at Near-Light Speed?
- Steeve Leaf
- · Replies 93 ·
Graduate Compute Induced Metric on Kerr Event Horizon
- Jonsson
- · Replies 5 ·
Undergrad What modified gravity theories should we check if dark matter doesn't exist?
- Fred Bett
- · Replies 4 ·
Graduate General relativity -- Proof of energy measured by observer
- Jonsson
- · Replies 8 ·
Graduate General relativity. What does momentum conservation mean?
- Jonsson
- · Replies 3 ·
Undergrad Why Open Manifolds are Relevant in Relativity
- davidge
- · Replies 17 ·
Graduate General Relativity: Components of ds^2
- Jonsson
- · Replies 2 ·
Undergrad Magnetic attraction between comoving electrons in vacuum
- primefield
- · Replies 9 ·
Undergrad If Earth were split into 4 pieces far apart, would each have 25% gravity?
- Benplace
- · Replies 10 ·
High School Where is all the places that QM and SR/GR disagree?
- member 620756
- · Replies 2 ·
Undergrad Embeddings of Gauge Group in Einstein-Yang-Mills Theory
- PhilipSS
- · Replies 1 ·
Undergrad Understanding ISSS from Minkowski Space to Poincaré Group
- AlephClo
- · Replies 7 ·
Undergrad Is Einstein's elevator different for gravity?
- csullens
- · Replies 42 ·
High School Is time a product of light speed or does time have its own constant?
- Simon Peach
- · Replies 12 ·
Graduate Understanding Orbital Angular Momentum Coupling to Christoffel Connection
- psi*psi
- · Replies 1 ·
High School What do I see while falling into a black hole?
- snoopies622
- · Replies 31 ·
Undergrad Why does the integral of dp/ds diverge at v=0?
- Kumar8434
- · Replies 25 ·
Undergrad Green's theorem in tensor (GR) notation
- davidge
- · Replies 19 ·
Undergrad Why traveling at light speed in a medium seems to eliminate the magnetic field
- Silviu
- · Replies 5 ·
Undergrad Why do GPS satellites stay synchronized with each other in curved spacetime?
- Arkalius
- · Replies 22 ·
Undergrad Is there a physical explanation for the relationship between light and space?
- Buckethead
- · Replies 159 ·
Undergrad Solving Confusion About Parallelograms in Curved Spacetime
- Sonderval
- · Replies 2 ·
Undergrad Lorentz transformation in 2 dimensions
- jonjacson
- · Replies 5 ·
High School Which frame of reference is the correct one?
- AishaGirl
- · Replies 13 ·
Graduate What do oscillators mean in lightcone gauge string theory?
- binbagsss
- · Replies 1 ·
Undergrad Equations for observed distance/velocity in SR
- Arkalius
- · Replies 40 ·
High School Create a flawed relativity argument and expose the error
- pervect
- · Replies 3 ·
High School How Does Speed Influence Time and Particle Decay in Einstein's Theory?
- menniandscience
- · Replies 91 ·
High School Special Relativity Q: Choosing Light as Ref
- Cathr
- · Replies 8 ·
Undergrad Number of independent components of the Riemann tensor
- Sonderval
- · Replies 6 ·
Undergrad Index Notation for Lorentz Transformation
- fayled
- · Replies 11 ·
High School What would a perfect relativistic quantum particle simulation need?
- Jeronimus
- · Replies 2 ·
High School Relativistic simultaneity and symmetry problem
- Chris Miller
- · Replies 52 ·
High School Twin paradox spacetime odometer app
- m4r35n357
- · Replies 11 ·
Undergrad Gravitational time dilation calculation near a Black Hole
- Antonio
- · Replies 8 ·
Graduate Finding the EM potential Aν from the field tensor Fμν
- denijane
- · Replies 7 ·
Undergrad What is the most correct way to write a vector in GR?
- davidge
- · Replies 16 ·
Graduate Distance from Black Hole to experience Time Dilation
- eiyaz
- · Replies 14 ·
Undergrad Why are space and time independent in classical Newtonian physics?
- Dimani4
- · Replies 4 ·
Undergrad Deriving Weak-Field Schwarzschild Metric from LEFEs
- Nikhil Hadap
- · Replies 2 ·
Undergrad Interactive Minkowski Diagram Tool
- Divy Jain
- · Replies 4 ·
High School Can worldlines alone explain rotation, or do particles need orientation?
- Jeronimus
- · Replies 12 ·
Graduate Are spacelike and timelike vectors orthogonal?
- koustav
- · Replies 12 ·
Undergrad How Does Time Dilation Affect Jill's Perception of Jack's Clocks?
- Dimani4
- · Replies 2 ·
Undergrad If Mass is relative, is "gravitational" mass relative?
- John Morrell
- · Replies 19 ·
Undergrad Can time be compressed without affecting distance?
- LordChallen
- · Replies 8 ·
High School Can Two Objects Exist in Each Other’s Past Simultaneously?
- EarthBound
- · Replies 1 ·
Undergrad What does Jill see when observing synchronized clocks on her train?
- Dimani4
- · Replies 18 ·
Undergrad Time dilation of a rotating disk
- JonnyHilbert
- · Replies 35 ·
Undergrad What Does Shankar Mean in Prof Shankar's Introduction to Relativity?
- abrogard
- · Replies 6 ·
High School Zeno's arrow paradox and general relativity?
- Andraz Cepic
- · Replies 21 ·
High School Magnitude of gravitational time dilation
- georgir
- · Replies 10 ·
Undergrad Understanding Schutz's Geodesic Deviation Eq. 6.84
- patrik1982
- · Replies 3 ·
Undergrad Is the gradient one-form normal or tangent to a surface?
- joneall
- · Replies 8 ·
Graduate Can time be considered a direct function of movement?
- dasmike1
- · Replies 37 ·
Undergrad Moving Clock: Lorentz Factor Calculation
- Dimani4
- · Replies 2 ·
Undergrad Relativistic doppler shift and radar
- Corvinus96
- · Replies 5 ·
Undergrad Why would we need faster than light travel?
- marksyncm
- · Replies 45 ·
High School Object A is moving relative to O , what does it mean?
- diazdaiz
- · Replies 3 ·
Undergrad Einstein's Train: Does Speed Exceed c?
- Chris Frisella
- · Replies 4 ·
High School How Planetary Bodies Affect Space Time
- BL4CKB0X97
- · Replies 4 ·
Undergrad Why don't time dilation results match in different reference frames?
- Dimani4
- · Replies 12 ·
High School Ideal demonstration of time dilation
- Andrew Wright
- · Replies 24 ·
Undergrad Radial Proper Dist. Objects Free Fall: Calculating Δs
- timmdeeg
- · Replies 7 ·
Graduate The formation of the event horizon.
- hexexpert
- · Replies 3 ·
Undergrad What is Einstein's equation used for?
- Ashley Warnes
- · Replies 7 ·
High School Charged Black Hole Hawking Radiation: Answers to Questions
- SlowThinker
- · Replies 2 ·
Undergrad Myths of Modern Popular Physics
- tzimie
- · Replies 13 ·
Undergrad Velocity in relativistic mass during acceleration integration
- JohnnyGui
- · Replies 22 ·
Undergrad Relativistic relative velocity
- davidge
- · Replies 19 ·
Undergrad Symmetry of Liénard-Wiechert Potentials
- particlezoo
- · Replies 1 ·
Graduate Time Dilation Test: No Deviation From Relativity Predictions Found
- Orodruin
- · Replies 1 ·
Undergrad Test the Speed of Light: Traveling Toward a Strobe Light
- AndyKeeble
- · Replies 6 ·
Graduate Four velocity with the Schwarzchild metric
- Pogags
- · Replies 2 ·
Undergrad Do most physicists believe time flows?
- eiyaz
- · Replies 1 ·
Undergrad Thought Experiment Contradiction: Find the Answer
- dylanreynolds1
- · Replies 3 ·
Graduate How these notions relate to the usual SR approach?
- leo.
- · Replies 18 ·
Undergrad Spinor Representation of Lorentz Transformations: Solving the Puzzle
- Frank Castle
- · Replies 6 ·
Undergrad Applications of Wedge-Product and Differential Forms
- davidge
- · Replies 10 ·
High School Why do observers see each other's lengths contract?
- MetinErsin
- · Replies 14 ·
Undergrad Could it be that the photon has a non-zero mass?
- sha1000
- · Replies 29 ·
Undergrad Relativity of simultaneity, time dilation misunderstanding
- sha1000
- · Replies 12 ·
Undergrad Why does a photon follow a curved path in a falling lift?
- CassiopeiaA
- · Replies 3 ·
High School Light pulse arrival time with length contraction at 0.6c relative speed
- david316
- · Replies 81 ·
High School What is the Worldline of a Quantum Particle Before and After State Reduction?
- cube137
- · Replies 2 ·
Undergrad Transforming a vector between nearby coordinate points
- davidge
- · Replies 6 ·
Graduate Gravity of a Light Pulse: Relation to E/c^2
- Simon Bridge
- · Replies 7 ·
Undergrad Calculating Gravitational Mass of Compressed Gas Cylinder
- Khashishi
- · Replies 8 ·
High School Exact coordinates for accelerated twin paradox observer
- Jeronimus
- · Replies 11 ·
Undergrad Energy contained in fuel in speed of light ship
- vansrv8
- · Replies 31 ·
Graduate How to Integrate the geodesic equations numerically?
- Matter_Matters
- · Replies 6 ·
Undergrad Particle accleration under gravitational waves?
- AAB1994
- · Replies 19 ·
High School An Interpretation of the Geometry of Space-Time Inside a BH
- dgm7691
- · Replies 7 ·
Undergrad Query on basic mechanics of Special Theory of Relativity
- Pebble
- · Replies 11 ·
Undergrad Why do collisions appear simultaneous in one frame but not another?
- IsakVern
- · Replies 3 ·