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
Graduate Does Wikipedia's time dilation space travel example ignore turnaround effects?
- kornelma
- · Replies 5 ·
Graduate Does FTL Travel Really Lead to Time Travel?
- frakie
- · Replies 11 ·
Graduate What is a principal null direction
- purakanui
- · Replies 5 ·
Graduate Could Maximum Gravity Explain Curved Space Phenomena?
- -Job-
- · Replies 11 ·
Graduate Twins Paradox - but with a different spin
- qualiaoftao
- · Replies 36 ·
Graduate The Elegance and Complexity of Theories Beyond Special and General Relativity
- RiddlerA
- · Replies 18 ·
Graduate Instantaneous communication, Aharanov-Bohm and the Coulomb Gauge
- maverick_starstrider
- · Replies 1 ·
Graduate Why isn't velocity a dimension in SR?
- vinven7
- · Replies 3 ·
Undergrad Does a clock on a fast-moving shuttle record less time than one on Earth?
- apinkpwny
- · Replies 34 ·
Graduate Correlating/deriving space time bend with law of gravitation
- San K
- · Replies 2 ·
Undergrad How To Travel at The Speed of Light
- JtValentine
- · Replies 5 ·
Graduate SR - car with headlights - new twist
- elegysix
- · Replies 5 ·
Graduate 4-velocity transforms as a vector?
- haushofer
- · Replies 9 ·
Graduate 0.0018 degrees/year due geodetical effect
- Alvydas
- · Replies 2 ·
Graduate Energy momentum of linearized gravity.
- IRobot
- · Replies 4 ·
Graduate Measuring curvature of space around a star
- lavinia
- · Replies 8 ·
Graduate How can a black hole evaporate instantly if speed of gravity is c?
- kamenjar
- · Replies 30 ·
Undergrad Why the speed of light in the equation?
- jack616
- · Replies 13 ·
Graduate Time dilation in minkowski diagrams
- center o bass
- · Replies 12 ·
Universal Rate of Movement = Time
- jetstone
- · Replies 2 ·
Graduate Time dilation and Length contraction in Saddle Geometries
- kmarinas86
- · Replies 5 ·
Graduate Traveling parallel to a ray of light through a gravitational field
- mrspeedybob
- · Replies 8 ·
Graduate Lorentz Boosts in Group Representation (from Weinberg)
- Elwin.Martin
- · Replies 4 ·
High School Does time dilation affect the relative motion that causes it?
- swerdna
- · Replies 10 ·
Graduate What do I see if I was a particle at speed moving by a spaceship?
- fbs7
- · Replies 4 ·
Graduate Is Mass the Absolute Frame of Reference in the Universe?
- RiddlerA
- · Replies 36 ·
Undergrad Why do we still use special relativity if general relativity is more correct?
- lmoh
- · Replies 2 ·
Graduate Does gravity travel at light speed, faster, or instantaneously?
- farmer
- · Replies 41 ·
Graduate Timelike geodesics in Schwarzschild Metric.
- Nilupa
- · Replies 2 ·
Graduate Time dilation vs effects of high speed motion
- cookes3
- · Replies 1 ·
Undergrad What is the evidence for and against block universe theory?
- Jm84
- · Replies 14 ·
Graduate Covariant derivative of coordinates
- jfy4
- · Replies 3 ·
Graduate Light's direction of travel, bending, and speed
- bahamagreen
- · Replies 2 ·
Graduate Does Time Equate to Motion in the Theory of Relativity?
- twitch1
- · Replies 11 ·
Undergrad Is the Earth's gravity actually caused by its acceleration?
- joan pendleto
- · Replies 4 ·
Graduate Does radioactivity suffer time dilation?
- singhvi
- · Replies 9 ·
Graduate How does LQG handle discreteness?
- Vorde
- · Replies 1 ·
Graduate How Does Momentum in Special Relativity Connect with Quantum Mechanics?
- curiouser84
- · Replies 1 ·
Graduate Levi-Civita Symbol: Understanding Rank 8 Tensor Properties
- qinglong.1397
- · Replies 6 ·
Graduate Spacetime Interval in non-inertial frames.
- The1337gamer
- · Replies 7 ·
Graduate Can the speed limit be higher than light?
- Super Luminal
- · Replies 27 ·
High School How much faster does time pass in space in comparison to that on Earth?
- Ralphonsicus
- · Replies 6 ·
Graduate Can quantum mechanics explain the relationship between mass and energy?
- Algren
- · Replies 23 ·
Graduate Decoding Mercury's Anomalous Precession: Discovering Pre-GR Explanations | [url]
- dr_venturi
- · Replies 1 ·
Graduate No. of Independent Components of Riemann Tensor in Schwartzchild Metric
- ObsessiveMathsFreak
- · Replies 1 ·
Undergrad What does the time coordinate represent in spacetime?
- constantinou1
- · Replies 19 ·
Graduate Alternative derivations of time dilation
- elegysix
- · Replies 3 ·
Graduate Headlights reflected in a mirror at relativistic speed
- elegysix
- · Replies 29 ·
Undergrad Where can I find the formula for the relavistic rocket equation?
- Albertgauss
- · Replies 3 ·
Graduate Did CERN neutrino experiments measure speeds faster than light?
- Noja888
- · Replies 1 ·
Graduate What Lies Inside a Black Hole?
- Jim Graham
- · Replies 26 ·
Graduate 1 = v^2 + t^2? and look at spacetime as velocity as x axis, time as y axis.
- darkhorror
- · Replies 4 ·
Graduate Why does Born keep referring to the luminiferous ether in his 1920 relativity book?
- khil_phys
- · Replies 6 ·
Graduate Why does gravity stay attractive if time runs backwards?
- A-wal
- · Replies 560 ·
Graduate Is Our Understanding of the Space of Einstein Metrics Limited?
- Naty1
- · Replies 2 ·
Graduate How can objects in 4-D spacetime interact after experiencing time dilation?
- Snip3r
- · Replies 4 ·
Graduate Bell's Spaceship Paradox - Shouldn't the thread stay connected?
- riverway
- · Replies 10 ·
Graduate Does Bob see an object that fell into a black hole before he started watching?
- Smoggyrob
- · Replies 38 ·
Graduate Time in Physics 4-Vectors: Is Time Included in the Position Four-Vector?
- jaketodd
- · Replies 6 ·
Undergrad Gravitational waves and Tidal forces
- alvarogz
- · Replies 11 ·
Graduate Is the Arthur Beiser Logic in Concepts of Modern Physics Appropriate?
- bibhu1984
- · Replies 12 ·
Graduate Relativistic angular momentum and cyclic coordinates
- maverick_starstrider
- · Replies 3 ·
Graduate Why hasn't quantum gravity been unified after 60 years?
- hollowsolid
- · Replies 18 ·
Graduate Can someone explain the logic behind Einstein's Mirrors Experiment?
- Mike Hobbs
- · Replies 26 ·
Graduate Grazing collision of two black holes
- Antiphon
- · Replies 2 ·
Graduate Speed of light becomes Infinity and Zero
- RiddlerA
- · Replies 45 ·
Graduate Euler-Lagrange equations for geodesics with arbitrary parameter
- noamriemer
- · Replies 1 ·
Graduate Relativity of rotating system(s)
- S.R.Wilton
- · Replies 34 ·
Graduate What is varing in the variational principle of GR
- spocchio
- · Replies 1 ·
Graduate Lorentz Contraction/ Simultan Problem
- Albertgauss
- · Replies 4 ·
Graduate Solving D'Inverno Ch 19 Problem 19.5
- TerryW
- · Replies 2 ·
Graduate In curved space-time, what causes gravitational acceleration?
- ft_c
- · Replies 23 ·
Graduate Understanding Relative Velocity and the Speed of Light
- jumpin'jack
- · Replies 6 ·
Graduate Lie Derivatives and Parallel Transport
- PhizzyQs
- · Replies 4 ·
Graduate Does a beam rider see a distant clock's hands move?
- Taco Picasso
- · Replies 5 ·
Graduate What is the Best Book to Learn Topology for General Relativity?
- world line
- · Replies 4 ·
Graduate Definition of Negative Pressure in the Stress-Energy Tensor
- putongren
- · Replies 20 ·
Graduate Gravitational potential energy storage location
- jpo
- · Replies 46 ·
Graduate What is the Geometrical Meaning of the Einstein Tensor?
- TrickyDicky
- · Replies 8 ·
High School Can you touch yourself if you run around a tree at light speed?
- joffess
- · Replies 13 ·
Undergrad Twin paradox and time dilation
- X-rays
- · Replies 1 ·
Graduate If Geodesic are light cone, how can be test particle trajectiories
- spocchio
- · Replies 5 ·
Graduate Thought experiment for general rel., I can't remember how it goes
- ericqb
- · Replies 3 ·
Graduate Does the producing process of gravitational waves produce gravitation?
- climatos
- · Replies 12 ·
Undergrad E=MC^2 Here,say we want to find the energy of a single
- AakashPandita
- · Replies 9 ·
Graduate Proof of relativistic energy/mass to grow to infinity for v approaching c?
- Vincentius
- · Replies 10 ·
Graduate Why Do Reference Frames Yield Different Time Intervals in Special Relativity?
- Lucy Yeats
- · Replies 13 ·
Graduate The old car headlights at the speed of light scenario. conceptual questions
- elegysix
- · Replies 4 ·
Graduate Is it possible that Mass is the /same thing/ as curved spacetime?
- tgm1024
- · Replies 19 ·
Graduate Teaching relativity to a skeptic
- metiman
- · Replies 37 ·
Undergrad Why do pion decay and time dilation seem contradictory?
- PrincePhoenix
- · Replies 35 ·
Graduate Finding a good summary of Hawking-Penrose singularity theorems
- tom.stoer
- · Replies 2 ·
Undergrad One clock on Earth, one on Mars
- goodabouthood
- · Replies 26 ·
Graduate Ordinary and covaraint derivative
- world line
- · Replies 3 ·
Graduate Is There a Rigorous Proof That E_0 = mc^2?
- quZz
- · Replies 2 ·
Graduate Increase in weight if an object is illuminated
- climatos
- · Replies 3 ·
Graduate Does MOND involve field renormalization with a running gravitational constant?
- maverick_starstrider
- · Replies 6 ·
Graduate Existence according to reference frames
- nkpstn
- · Replies 7 ·
Graduate What is the angular speed limit, like linear speed limit is c?
- phydev
- · Replies 3 ·
Undergrad Weightlessness: Gravitational Effects When a > g
- scjoshi.007
- · Replies 7 ·