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 Why do particles move along longest proper time trajectories
- Bas73
- · Replies 42 ·
Graduate Complex components of stress-energy tensor
- xpet
- · Replies 3 ·
Undergrad Electrical Current Repelling Magnets Due to Relativity
- Cardinalmont
- · Replies 8 ·
Undergrad Clock hypothesis, gravity time dilation and Equivalence Principle
- BilboBaggins2
- · Replies 60 ·
High School Visual Effects of Light Travel: Analyzing "Journey to Edge of Universe
- Randal Smith
- · Replies 7 ·
High School Synchronize Clocks in Relative Motion: How & Why
- exmarine
- · Replies 2 ·
Undergrad Nearly Lorentz Coordinate Systems: Is h a Tensor?
- Silviu
- · Replies 2 ·
Undergrad Finding Covariant and Contravariant components of Cylin Coor
- thusidie
- · Replies 3 ·
Graduate Uncovering the Truth Behind LIGO's Gravity Wave Detection: A Critical Analysis
- auou
- · Replies 117 ·
High School Gravity and how does the surface get it ?
- mr1batman
- · Replies 2 ·
Graduate Mystery of Einstein's Relativity Solved with Classical Physics
- vin300
- · Replies 3 ·
Undergrad Minkowski metric beyond the event horizon
- disregardthat
- · Replies 32 ·
Undergrad Incompleteness of geodesics as ##t \longrightarrow 0##
- Tio Barnabe
- · Replies 8 ·
Undergrad Going from Galilei to Minkowski
- Harry83
- · Replies 21 ·
High School Do Objects in Motion Create Gravitational Waves?
- Ross B
- · Replies 50 ·
Undergrad Calculate Time at Infinity for GR Observer: A Photon's Journey
- Kara386
- · Replies 5 ·
High School 2 clocks -- Using orthogonal light path detectors in a space ship
- Ross B
- · Replies 33 ·
Undergrad Geodesic Deviation in Static Spacetime: Flat Geometry
- timmdeeg
- · Replies 5 ·
Undergrad How is a vector a directional derivative?
- mp6250
- · Replies 10 ·
Undergrad Answer: Understanding the Effect of Gravity on Falling Objects
- Whitehole
- · Replies 13 ·
Undergrad Singularities in General Relativity
- Tio Barnabe
- · Replies 12 ·
Undergrad Explore Homogeneity of Space: Effects on Relativity Theory
- weezy
- · Replies 1 ·
Undergrad Manipulating Christoffel Symbols: Questions & Answers
- whatisreality
- · Replies 2 ·
High School Is anyone looking for this: reaching speed of light
- marmstrong941
- · Replies 21 ·
Undergrad Determining Mass & Info of Merging Neutron Stars from LIGO Signal
- jordankonisky
- · Replies 7 ·
Undergrad Relativistic field of moving charge. Why is it symmetric?
- Luis Babboni
- · Replies 2 ·
Undergrad Can't understand this argument for Lorentz transformation y'=y
- Happiness
- · Replies 15 ·
High School What (if anything) limits the speed of something falling into a black hole?
- jerromyjon
- · Replies 56 ·
High School Relativistic Mass of Sub-Atomic Particles: What Does it Mean?
- itoero
- · Replies 81 ·
Undergrad Maxwell's Equations, Hodge Operators & Tensor Analysis
- Silviu
- · Replies 2 ·
Undergrad Einstein Field Eqs: Stress Energy Tensor Explained
- Silviu
- · Replies 2 ·
High School Can General Relativity and Quantum Field Theory Be Reconciled?
- Megaton
- · Replies 3 ·
Undergrad Finding distance in polar coordinates with metric tensor
- thusidie
- · Replies 9 ·
Undergrad Speed of gravity vs. speed of light
- exponent137
- · Replies 7 ·
Undergrad Relativistic Mass Calculation with 4th Dimensional Vector
- afeser
- · Replies 9 ·
Undergrad Contradiction between two fundamentals
- commander_24
- · Replies 1 ·
Undergrad Torsion & Non-Closed Rectangle in Feynman & Penrose
- Sonderval
- · Replies 7 ·
Undergrad Spinning disk, length contraction, & equivalence principle
- Sorcerer
- · Replies 8 ·
Undergrad Theorem Proved: Universal Speed C in SR?
- andrew s 1905
- · Replies 2 ·
Graduate Can Weyl Tensor Look Like Negative Mass?
- gnnmartin
- · Replies 10 ·
High School Speed of light and modern physics
- commander_24
- · Replies 2 ·
Undergrad How do I apply weak field approximation to the Einstein field equation?
- Das apashanka
- · Replies 1 ·
Undergrad Why must the spacetime we inhabit be a geodesically complete manifold?
- Pencilvester
- · Replies 14 ·
High School According to General Relativity, would the Earth be 'flat'?
- AstralSentient
- · Replies 25 ·
Undergrad GR in Newtonian Limit: Understanding Weak Fields & Inequalities
- Silviu
- · Replies 3 ·
High School Is Light Traveling Through Time?
- Physicsislifetome
- · Replies 5 ·
High School Time Dilation: Moving Rocket 0.5c vs Accelerating Rocket 0.5c
- pavelbure9
- · Replies 4 ·
Undergrad Where Did LIGO Find Merging Black Holes?
- Albertgauss
- · Replies 3 ·
Undergrad Gravitational Wave Modeling: A Thought Experiment
- Jim Lundquist
- · Replies 6 ·
Undergrad Understanding the Proof of Delta Variation for Determinant of Metric
- Das apashanka
- · Replies 3 ·
Undergrad Einstein Hilbert action
- Das apashanka
- · Replies 2 ·
High School Volumes and Hyper Volumes Related Special Relativity
- Sasha Jaffarove
- · Replies 1 ·
Undergrad Gradient in the rate of time vs acceleration
- synch
- · Replies 13 ·
Graduate Taylor Expansion of Metric Tensor: Troubles & Logic
- mertcan
- · Replies 4 ·
Undergrad How do you calculate the time component of a 4-Vector
- Philosophaie
- · Replies 6 ·
High School Gravitational waves and "warp drive"
- jerromyjon
- · Replies 1 ·
Undergrad EM Force vs. Gravity: Modeling Spatio-Temporal Curvature
- Ontophobe
- · Replies 5 ·
High School How is light influenced really close to the event horizon?
- MisterMuoN
- · Replies 11 ·
Graduate Calculating Ricci tensor in AdS space
- HamOnRye
- · Replies 8 ·
High School Is Einstein's explanation of gravity just a geometrical replacement?
- menniandscience
- · Replies 8 ·
High School Transforming Relativistic Kinetic Energy: A Concise Mathematical Trick
- quiet
- · Replies 7 ·
Undergrad Schwarzschild equation of motion: initial conditions
- Yukterez
- · Replies 55 ·
High School Faraday's disk and "absolute" magnetic fields
- Buckethead
- · Replies 128 ·
High School Einstein Proven Right by 2017 Eclipse? Investigation
- smodak
- · Replies 5 ·
Undergrad Shape of Vacuum Space: Constant Spatial Volume with Time
- TGlad
- · Replies 9 ·
Undergrad LIGO and light speed constancy
- ewq
- · Replies 118 ·
High School Do Gravitational Waves Always Travel at the Speed of Light?
- calinvass
- · Replies 13 ·
Graduate Does the inverse square law hold indefinitely for gravity?
- Jake Banner
- · Replies 2 ·
Undergrad Are Local Lorentz Transformations Possible with Varying ##\vec{x}##?
- Tio Barnabe
- · Replies 4 ·
Undergrad Are Electric and Gravitational Fields Different for Moving Objects?
- Silviu
- · Replies 5 ·
Undergrad Speed of light on a moving platform
- jay t
- · Replies 86 ·
High School Relative Rotation: Physics Approach for Newton's Bucket in Empty Universe
- Alfredo Tifi
- · Replies 5 ·
Undergrad Stress Energy Tensor: How Does It Implicate Flow of Energy?
- Silviu
- · Replies 6 ·
High School Postulates of General Relativity
- Jimmy87
- · Replies 17 ·
Undergrad Can two gravitational waves orbit each other?
- friend
- · Replies 11 ·
Undergrad Positive Charge Magnetic Fields: Real World Examples
- Windadct
- · Replies 5 ·
Graduate Black Hole Merger: Analytical or Numerical Solutions?
- sandy stone
- · Replies 9 ·
Undergrad Velocity Addition Formula: u_y > c?
- D O
- · Replies 2 ·
Undergrad Unexpected result on Lorentz transformation
- Tio Barnabe
- · Replies 2 ·
Undergrad Understanding Stress Energy Tensor of Fluids
- Silviu
- · Replies 13 ·
Undergrad Index Gymnastics: Matrix Representations & Rank-2 Tensor Components
- SiennaTheGr8
- · Replies 1 ·
Undergrad Does Feynman's Work on Gravitons Clarify Quantum Gravity?
- TensorAndTensor
- · Replies 1 ·
Graduate Derive the Bianchi identities from a variational principle?
- Gio83
- · Replies 2 ·
High School What happens when you solve for c?
- Joshua514
- · Replies 11 ·
High School Concept of the stability of the speed of light
- Graham P
- · Replies 7 ·
High School Can Relativity Theories Actually Permit Faster-Than-Light Travel?
- Citizen247
- · Replies 6 ·
Undergrad Pressure term in the energy stress tensor
- Ron19932017
- · Replies 9 ·
High School Newb question about relativistic mass
- Involute
- · Replies 28 ·
Undergrad How does Einstein define simultaneity in his 1905 paper?
- Aufbauwerk 2045
- · Replies 62 ·
Undergrad Comparing Vacuum Solutions to Topologies of Einstein Space
- TGlad
- · Replies 3 ·
Graduate How Does Physics Behave in 2+2 Dimensional Spacetimes?
- Intrastellar
- · Replies 7 ·
Undergrad Is Gravity Invariant During Motion?
- bahamagreen
- · Replies 2 ·
High School Electric+Magnetic Force Between a & b Charges: Inertial Frames
- Tahmeed
- · Replies 2 ·
Undergrad Twin paradox in SR and its applicability to radioactive decay
- Scott444
- · Replies 8 ·
High School Center of momentum and mass energy equivalence
- nitsuj
- · Replies 83 ·
Undergrad Proper time to reach the singularity - rocket acceleration
- timmdeeg
- · Replies 12 ·
Undergrad How does this not get me traveling to another star FTL?
- Scott444
- · Replies 18 ·
High School Understanding Mass and Density in Relativity Theory: A Critical Analysis
- sweet springs
- · Replies 27 ·
High School Could this FTL idea with a fast moving large mass be possibl
- michaellee8
- · Replies 1 ·
Undergrad Photon states should not evolve?
- Tio Barnabe
- · Replies 88 ·