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
Undergrad Unifying Gravity: The Quest to Understand a Fictitious Force
- Iheartscience
- · Replies 23 ·
Graduate Space-Time Curvature in General Relativity
- klen
- · Replies 9 ·
Graduate Deriving 8πG/c^4 in General Relativity
- shounakbhatta
- · Replies 1 ·
Graduate Momentarily co-moving inertial frames
- Geofleur
- · Replies 7 ·
Graduate Does Length Contraction affect measured velocity?
- taylorules
- · Replies 7 ·
High School Inertial Frames of Reference - Understanding Special Relativity for 11-Year-Olds
- Mahdi Al Sabad
- · Replies 8 ·
Graduate What curves space and bends light: Mass or Gravity?
- Dukon
- · Replies 22 ·
High School How Does Michelson-Morley Interferometer Measure Space-Time?
- Alex299792458
- · Replies 1 ·
Undergrad Speed of Light: Length Contraction & 20AU Paths
- EbolaHost
- · Replies 1 ·
Graduate Creating Mass w/ Velocity: Effects on EM Wave?
- marlowgs
- · Replies 5 ·
Graduate Question about time travel to the past
- JohnnyGui
- · Replies 19 ·
Graduate Derivation of Kirchhoff's Formula in Gravitational Radiation
- jstrunk
- · Replies 10 ·
Graduate Synge's "World Function": History & Significance
- facenian
- · Replies 3 ·
Undergrad How do we orbit the sun when you can set your origin anywhere....
- houlahound
- · Replies 22 ·
Graduate Are spatial and temporal dimensions interchangeable?
- R. E. Nettleton
- · Replies 7 ·
High School Could Everything on Earth Float Without Spacetime?
- George Akba
- · Replies 42 ·
Graduate How does gravity affect the path of light?
- Ron777
- · Replies 4 ·
Undergrad Gravitational Time Dilation: A Layman's Explanation
- Hihello
- · Replies 5 ·
Undergrad What does Purcell actually say about electromagnetism and relativity?
- bcrowell
- · Replies 32 ·
Graduate SR as Geometrical Constructions
- bcrowell
- · Replies 5 ·
High School Black Holes: Effects on Space Explored
- Joe_Limon
- · Replies 6 ·
Graduate What is the difference between standard and isotropic metrics?
- Emilie.Jung
- · Replies 9 ·
Graduate Cosmological constant times the metric tensor
- Isaac0427
- · Replies 12 ·
Graduate Is the equivalence principle related to the principle of relativity?
- Hihello
- · Replies 2 ·
Graduate Explore Entropy & Event Horizons: Self-Taught Physics
- Alicowie
- · Replies 2 ·
Undergrad SR Proves Eternalism: Is It Physically Substantial?
- guygerst
- · Replies 5 ·
Graduate Can You Truly Achieve No Motion in Space?
- AlanC
- · Replies 18 ·
Graduate Derivation from Landau and Liffshitz, vol 6
- Geofleur
- · Replies 21 ·
Graduate Are Gravitational Waves Lossy?
- Grinkle
- · Replies 5 ·
Graduate Alternative definitions of geodesic
- bcrowell
- · Replies 45 ·
Graduate Covariant fields and new physics
- giulio_hep
- · Replies 5 ·
High School Is time dilation just a problem with our clocks?
- Edriven
- · Replies 84 ·
Graduate What is a gravity wave detector measuring?
- Grinkle
- · Replies 5 ·
Graduate Is the center of mass fixed in Relativity?
- fast_squirrel
- · Replies 9 ·
Undergrad What is the Principle of Equivalence and how was it determined?
- Emilie.Jung
- · Replies 76 ·
High School What Are the Key Characteristics and Locations of Stellar Black Holes?
- DarioC
- · Replies 2 ·
Graduate Why doesn't the vertical light beam get out of a black hole?
- John Duffield
- · Replies 41 ·
Graduate Does Gravity Expand Space? Einstein's Theory Explained
- pforeman
- · Replies 1 ·
Graduate Using Light as a absolute frame of reference?
- FrancisClinton
- · Replies 55 ·
Graduate Time Dilation: Photon Reflecting Surface Experiment
- Aniket1
- · Replies 19 ·
Graduate Einstein-Hilbert action origin
- Emilie.Jung
- · Replies 18 ·
Graduate Clarification on synchronous clocks
- bahamagreen
- · Replies 10 ·
Graduate How to prove that something is a non-curvature singularity?
- bcrowell
- · Replies 23 ·
Graduate Understanding Invariance of Spacetime Intervals
- nomadreid
- · Replies 2 ·
Graduate Falling Through a Hole in the Earth: GR Effects on Motion
- Adrian F
- · Replies 11 ·
Graduate What Would Happen if 2 People Were 1 Light Hour Apart?
- Paras Patel
- · Replies 2 ·
Graduate Momentum in special relativity
- Sobhan
- · Replies 6 ·
Graduate What's the 3d equation of the Alcubierre warp?
- Teslanumber1
- · Replies 8 ·
Graduate What is the relativity of simultaneity measuring?
- DAC
- · Replies 20 ·
Graduate Traversable wormhole without negative energy (paper)
- MTd2
- · Replies 10 ·
Who Really Discovered Time and Its Origins?
- DAC
- · Replies 12 ·
Graduate 4 velocity in Schwarzchild metric
- Big Guy
- · Replies 11 ·
Graduate Spotting Errors in Transverse & Longitudinal Accelerations
- greswd
- · Replies 2 ·
Undergrad Relative Time in Space: What Speed for 1 Day Equals 1 Day on Earth?
- mileymo
- · Replies 9 ·
Graduate Help with Twin Paradox: Understand Contradiction
- aliens123
- · Replies 30 ·
Graduate Time Dilation by Light Alone? A Software Engineer's Exploration
- stringpoet
- · Replies 13 ·
Graduate Observing the event horizon of a black hole
- Peter953
- · Replies 6 ·
Graduate Inertial observers explanation for unruh thermalization
- T S Bailey
- · Replies 9 ·
Graduate Muons hitting Earth half-life explanation in SR
- loislane
- · Replies 12 ·
Graduate What is the true nature of time and space for a photon?
- DiracPool
- · Replies 5 ·
Graduate Travel to Light Speed: Acceleration & Deceleration
- mileymo
- · Replies 3 ·
Undergrad Why is the Constant in Mass-Energy Equivalence C^2?
- Manel
- · Replies 7 ·
Graduate Do gravitational waves propogate slower when blocked by mass
- NotJimmy
- · Replies 5 ·
Graduate Can time dilation be explained by changes in the rate of entropy?
- newjerseyrunner
- · Replies 5 ·
Graduate Why the Delay? Uncovering Black Hole Reactions
- jartsa
- · Replies 8 ·
Graduate Does acceleration curve spacetime?
- DaniV
- · Replies 10 ·
Graduate Is Gravity Really the Weakest Force in the Universe?
- FredrikJ
- · Replies 5 ·
Undergrad Why does a black hole get bigger when it consumes mass?
- Mark Lees
- · Replies 10 ·
Graduate Problem with Purcell's model of electromagnetism
- John Duffield
- · Replies 24 ·
Graduate Time Dilation: Explained for Twin Paradox
- Heatherfield
- · Replies 16 ·
Insights Time Dilation and Redshift for a Static Black Hole - Comments
- stevebd1
- · Replies 42 ·
Graduate Gravity, Time Dilation & Black Holes: Q&A
- mileymo
- · Replies 4 ·
Graduate Redshift effect And photon energy loss
- ujellytek
- · Replies 3 ·
Graduate Proving Non-linear Wave Equation for Riemann Tensor
- dman12
- · Replies 3 ·
Graduate Barut's Electrodynamics Identity Problem
- facenian
- · Replies 17 ·
High School Electromagnets are a relativistic phenom?
- DaveC426913
- · Replies 47 ·
Graduate Very precise Michelson-Morley experiments
- wmikewells
- · Replies 22 ·
Undergrad What is the 2D Concept of Spacetime and How Does It Work?
- Dimitri655
- · Replies 20 ·
Graduate What is the interpretation of a Misner string in Bonnor's theory?
- bcrowell
- · Replies 6 ·
Undergrad Struggling with the Special Relativity and simultaneity
- Ut-Napishtim
- · Replies 60 ·
Graduate Proving "Rotation Matrix is Orthogonal: Necessary & Sufficient
- brotherbobby
- · Replies 5 ·
Graduate Time Dilation & Acceleration: Leaving Earth Effects
- wondercosmos
- · Replies 3 ·
Undergrad Does time depend on speed; or on velocity?
- Shafat Hasan
- · Replies 8 ·
Graduate Calculating Total Time Dilation in a Falling Photon Experiment
- Josh3to107
- · Replies 7 ·
Graduate Space-Time Curvature: Evidence of Mass Effect?
- Muhammad Sabih
- · Replies 6 ·
Undergrad A Question about the empirical evidence of time
- Maxila
- · Replies 28 ·
Graduate Gravity's Effects on Light: Why Light Doesn't Always Follow a Straight Line
- Muhammad Sabih
- · Replies 2 ·
Graduate Orientability of Null Submanifold w/ Boundary - Stokes' Theorem
- ifidamas
- · Replies 2 ·
Undergrad Why is special relativity a local phenomenon?
- sunrah
- · Replies 7 ·
Undergrad How Einstein believed that space is curved?
- FrancisClinton
- · Replies 3 ·
Graduate Double covariant derivative of function of scalar
- Prafulla Bagde
- · Replies 1 ·
Undergrad Lorentz Transforms & Distribution Funcs: Physics Intro Help
- Reed Kartye
- · Replies 4 ·
Graduate How Does Einstein's Corner Term Challenge 5D General Relativity?
- MikeL#
- · Replies 2 ·
Graduate Is Lorentz Contraction Specious for Photon Traversal Time?
- einswine
- · Replies 11 ·
Graduate Witness the Sky of an Accelerated Black Hole
- jartsa
- · Replies 7 ·
Graduate De Sitter space, basic questions
- binbagsss
- · Replies 37 ·
Graduate Why Don't Probes Approach Each Other at 1.5c in Relativity?
- TheScienceGuy
- · Replies 22 ·
Graduate Measuring Time: What Does it Mean?
- Berenices
- · Replies 11 ·
Graduate Are Gravity Waves Distortions of Space-Time That Create Gravitons?
- Gal
- · Replies 4 ·
Graduate Inertial & Non-Inertial Frames: Laws of Physics Explained
- Krishankant Ray
- · Replies 33 ·