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 Solving Einstein's Field Equation: The Schwarschild Metric & Beyond
- TimeRip496
- · Replies 3 ·
Undergrad Acceleration & Special Relativity: Explained
- delsaber8
- · Replies 4 ·
Graduate CMBr & Absolute Motion: A Query
- bland
- · Replies 14 ·
Graduate S DILEMMA: Time Dilation in Simple Harmonic Motion?
- THE HARLEQUIN
- · Replies 9 ·
Graduate The co-moving frame - acceleration, momentum and velocity
- Drew Carey
- · Replies 4 ·
Graduate Time dilation why or how, Special Relativity causes
- Einstein Devotee
- · Replies 95 ·
Graduate Would the one accelerating please stand up?
- David Carroll
- · Replies 142 ·
Graduate Understanding Homogeneity & Isotropy in FRW Metric
- binbagsss
- · Replies 1 ·
Graduate Massive Object Paradox: Traveling Near Speed of Light?
- em370
- · Replies 1 ·
Graduate Parallel Transport & Covariant Derivative: Overview
- "Don't panic!"
- · Replies 1 ·
Graduate Understand Electromagnetic Force in Different Inertial Frames
- MathewsMD
- · Replies 7 ·
Graduate General Relativity: Manifold/Sub-Manifold Metric Theorem Q-Schwarzschild
- binbagsss
- · Replies 4 ·
Graduate Quick Questions on Free Indices - Four-Vector Notation
- rwooduk
- · Replies 11 ·
Graduate Deriving Geodetic Line by Einstein: Clarifying Difficulties
- sujoykroy
- · Replies 2 ·
Graduate When can a metric be put in diagonal form?
- binbagsss
- · Replies 12 ·
High School Does light revolve around mass like the moon orbits the Earth?
- TimeRip496
- · Replies 9 ·
Graduate Signature, boundary conditions and topology
- lucas_
- · Replies 7 ·
Undergrad Relative velocity time dilation question
- Canadian09
- · Replies 13 ·
Graduate A plane shoots a bullet -- energy at different frame?
- lemd
- · Replies 6 ·
Undergrad Does gravity affect a magnetic/electric field?
- PWiz
- · Replies 4 ·
Graduate Ds^2 Invariant Interval: Sign Dependence?
- binbagsss
- · Replies 3 ·
Graduate Deriving FRW Metric: Ricci Vector Algebra Explained
- binbagsss
- · Replies 1 ·
Graduate Solve Einstein Field Equation without Vacuum Solution
- TimeRip496
- · Replies 4 ·
Graduate Difference between images produced by gravitational lensing
- PWiz
- · Replies 12 ·
Graduate I'm having trouble understanding Lorentz transforms
- davidbenari
- · Replies 31 ·
Graduate Contracting \mu & \alpha - What Does It Mean?
- unscientific
- · Replies 3 ·
Graduate Solving Tensor Index Manipulation Confusion
- kau
- · Replies 1 ·
Graduate Why never any length expansion under Lorentzian Relativity?
- hkyriazi
- · Replies 7 ·
Graduate Find lorentz transformation for arbitrary velocity (v) relat
- Pual Black
- · Replies 19 ·
Graduate Can EM waves carry information faster than light?
- Cobalt101
- · Replies 4 ·
Graduate Link between SR and a magnetic field
- arydberg
- · Replies 18 ·
Undergrad Why Is Gravity Different from Electromagnetic Radiation?
- TimeRip496
- · Replies 11 ·
Undergrad Relativity: Noob Ques. - Why Do People on Earth Seem Stationary?
- willm78
- · Replies 15 ·
Graduate Is space really just an illusion?
- Rajkovic
- · Replies 7 ·
Graduate Were there objections to Einstein's theory of relativity?
- blue_leaf77
- · Replies 35 ·
Graduate What is the Difference Between Vectors and Dual Vectors in Spacetime?
- pierce15
- · Replies 13 ·
Graduate Electric dipole equivalence principle paradox?
- jcap
- · Replies 1 ·
Graduate Is Absolute Space and Time Really Absolute?
- name123
- · Replies 44 ·
Graduate Time Dilation & Foreshortening: Understanding the Twin Paradox
- Dave1939
- · Replies 13 ·
Graduate What Are the Limits of Classical Physics in Understanding Inertial Frames?
- inkliing
- · Replies 4 ·
Graduate Time Dilation Effects on a Probe
- bodykey
- · Replies 10 ·
Graduate Equivalence Principle Test Kits
- Edward Wij
- · Replies 35 ·
Undergrad What is the equation for the Schwarzschild Radius and why is π not included?
- carcosachild
- · Replies 1 ·
Graduate Special Relativity: Solving for τ
- Holystromboli
- · Replies 4 ·
Graduate Positive Mass Theorem: Explained Simply for Gravity Shielding
- TimeRip496
- · Replies 1 ·
Graduate Eotvos effect - Apparent only?
- Simple_One
- · Replies 2 ·
Graduate Why is Normal Area to Light Rays Invariant?
- center o bass
- · Replies 1 ·
Undergrad How many observers are needed to calculate the relativistic speed equation?
- Quarlep
- · Replies 3 ·
Graduate Are all solutions to Einstein's Field Equations Lorentzian manifolds?
- ShayanJ
- · Replies 7 ·
Graduate How Do You Expand the Antisymmetrized Tensor \( T_{1234} \)?
- PhyAmateur
- · Replies 7 ·
Graduate Is the Perspective of a Photon in Relativity Truly Timeless?
- SovereignX
- · Replies 2 ·
Graduate Relativity Calculation: Two Events?
- name123
- · Replies 11 ·
Graduate Deflection of Light Around Massive Bodies
- DiracPool
- · Replies 4 ·
Graduate Light Production in Gravity: Freq/Energy Impact?
- Gary Boothe
- · Replies 5 ·
Graduate Relative Motion & Rotation of Axes of Reference
- Holystromboli
- · Replies 6 ·
Graduate Why can different observers agree on their relative velocity
- davidbenari
- · Replies 9 ·
Graduate Gravitational Energy in GR: Energy Conservation Explained
- david316
- · Replies 5 ·
Graduate Curved-space Maxwell equations by differential forms?
- center o bass
- · Replies 9 ·
Graduate Deriving Max Symmetric Space from Spherically Symmetric - Sean M. Carroll
- binbagsss
- · Replies 2 ·
Graduate Quick question on Geodesic Equation
- unscientific
- · Replies 8 ·
Graduate Moving object launched by observer into a Wormhole
- Quds Akbar
- · Replies 1 ·
Graduate Intersteller: Lecture by Kip Thorne
- Rising Eagle
- · Replies 1 ·
Graduate Gravity's reaction force in the relativist model?
- NoBodyAlive
- · Replies 1 ·
Graduate Does the Einstein Field Equation Apply to Small Particles like Electrons?
- TimeRip496
- · Replies 11 ·
Undergrad Get confused about time dilation
- asdff529
- · Replies 10 ·
Graduate Heuristic Evaluation of Stress-Energy Tensor
- Itserpol
- · Replies 2 ·
Graduate Cosmological Constant, Einstein equation Quick Question
- binbagsss
- · Replies 13 ·
Graduate Schwarzchild metric spherically symmetric space or s-t?
- binbagsss
- · Replies 9 ·
Graduate Solving Einstein's Equation with Cosmological Constant: De Sitter Space
- binbagsss
- · Replies 3 ·
Graduate Non-Constant Cosmo-Constant: Controversy in GR?
- ChrisVer
- · Replies 1 ·
Graduate Resolving Ehrenfest Paradox: STR vs General Theory
- wellorderingp
- · Replies 7 ·
Graduate SR vs GR Simultaneity: Comparing Moving & Static Observers
- smoothoperator
- · Replies 4 ·
Graduate Aging when travelling near the speed of light
- Cyran
- · Replies 22 ·
Graduate Coordinate basis for cotangent space
- Ibix
- · Replies 4 ·
Graduate Better Equivalence Principle Explained
- Didymus5
- · Replies 13 ·
Graduate Is the depiction of curvature in wormhole diagrams accurate or misleading?
- DaveC426913
- · Replies 8 ·
Graduate Birkhoff's Theorem: Spherically Symmetric Vacuum Solution Static or Stationary?
- binbagsss
- · Replies 3 ·
Graduate FRW Metric in d Dimensions: Can I Expand?
- ChrisVer
- · Replies 3 ·
Graduate Understanding Null Geodesics in Relativity: Insights from Dirac's Book
- exmarine
- · Replies 7 ·
Graduate Is Uncertainty in Physics Related to Relativity's Concept of Velocity?
- Holystromboli
- · Replies 6 ·
Graduate Are Everyday Objects Spacelike?
- Dixanadu
- · Replies 6 ·
Graduate Energy-Mass Equivalence & Higgs Field Interaction
- Quds Akbar
- · Replies 2 ·
Graduate Killing tensor/vector very basic context question about consevation
- binbagsss
- · Replies 6 ·
Graduate Help Solve FORTRAN Post Newtonian Gravity Simulation
- goalie39
- · Replies 2 ·
Graduate Looking for 'absolute still' with time dilation
- Labyrinth
- · Replies 3 ·
Graduate Index Notation: Understanding LHS = RHS
- unscientific
- · Replies 8 ·
Undergrad Einstein Mass-Energy Equation: Will Mass Change?
- pap123456
- · Replies 7 ·
Graduate What do you mean, approaching the speed of light?
- Holystromboli
- · Replies 13 ·
Graduate Einstein Equation Quick sign question
- binbagsss
- · Replies 8 ·
Graduate How To Understand This Lorentz Transform?
- abrogard
- · Replies 9 ·
Graduate Vielbeins: Is $$e^1.e^1$$ a Basis Like $$i.i=1$$?
- PhyAmateur
- · Replies 1 ·
Graduate Geodesics: Stationary Property & Dirac
- exmarine
- · Replies 5 ·
Graduate The Paradox of Aging in Relativity: Resolving the Twin Paradox with a Twist
- doaaron
- · Replies 105 ·
Graduate Newtonian Spacetime: MTW Chap 12 Q&A by Tom
- tom.stoer
- · Replies 15 ·
Graduate Rigidly Constantly Accelerating Frame
- unscientific
- · Replies 5 ·
Graduate Kruskal-Szekeres Radius: Explained for Beginners in GR
- smoothoperator
- · Replies 2 ·
Graduate Does FTL Communication Alter Time Dilation for Twin Observers?
- dragoneyes001
- · Replies 21 ·
Graduate Time Dilation Across the Universe: Implications & Expansion
- julianwitkowski
- · Replies 1 ·
Undergrad Accelaration & forces in different inertial referance frames
- arpon
- · Replies 5 ·
Graduate Why Does Time Not Slow in a G-Field?
- Agrasin
- · Replies 2 ·