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 Question about speed of light and water
- Dao Tuat
- · Replies 3 ·
Graduate Experimenting with the speed of gravity
- \/3RT1G0
- · Replies 10 ·
Graduate Speed of light in an inertial frame
- MeJennifer
- · Replies 9 ·
Graduate Speed of light in a black hole
- rcgldr
- · Replies 1 ·
Graduate Is the Earth Flat? An Analysis of Spacetime Curvature
- markintheworld
- · Replies 3 ·
Graduate Learning General Relativity: A Beginner's Guide
- Vroomfondel
- · Replies 12 ·
Graduate What is the significance of the weak field approximation in general relativity?
- Thrice
- · Replies 3 ·
Graduate How Does Time Dilation Affect Light Speed from a Moving Spaceship?
- Giulio B.
- · Replies 3 ·
Graduate Gravitational Time Dilation.Or not?
- Riposte
- · Replies 15 ·
Graduate Constant speed of light in vaccum?
- violetS
- · Replies 4 ·
Graduate Contact Aliens: Faster Than Light Speed?
- lockecole
- · Replies 3 ·
Graduate A frame dragging experiment in an accelerated reference frame
- Redhat
- · Replies 5 ·
Graduate Time in SR and relativistic mass
- exponent137
- · Replies 7 ·
Graduate Did the Frame-Dragging Experiment Validate the Theory of Relativity?
- LaPalida
- · Replies 7 ·
Graduate Minkowski's 4 dimensional world
- therapeuter
- · Replies 30 ·
Graduate Spinning Objects in GR: Can a Geodesic be Traveled?
- MeJennifer
- · Replies 6 ·
Undergrad Dilated Time: What were they smoking?
- SexyElf
- · Replies 18 ·
Graduate Gravity Mystery: Ask "GR Crowd" for Deeper Understanding
- oldman
- · Replies 12 ·
What's wrong with this thinking?
- Tsunami
- · Replies 8 ·
Undergrad Is Light a Wave or a Particle in Spacetime?
- waznboyd
- · Replies 18 ·
Graduate Experimental Proofs of Special Relativity: Myons, Bertozzi & More
- philipp2020
- · Replies 3 ·
Graduate Subtle Distinction: Speed of Light for All Observers
- actionintegral
- · Replies 10 ·
Graduate Massive objects traveling near the speed of light
- pete5383
- · Replies 2 ·
Graduate Is Time the Key to Understanding Dimensions?
- Outlandish_Existence
- · Replies 6 ·
Graduate Do Wormholes Really Exist? Evidence and Explanation
- superweirdo
- · Replies 28 ·
Graduate Difficulties with interstellar travel
- vincentm
- · Replies 3 ·
Graduate Does Using a Sound Clock Affect Lorentz Transformations in Relativity?
- covers
- · Replies 8 ·
Graduate Can a frame of reference be wrong in determining motion in space-time?
- Born2Perform
- · Replies 99 ·
Graduate Two black holes falling head-on
- Jorrie
- · Replies 5 ·
Graduate Clock Synchronization: Einstein's Procedure & Others
- bernhard.rothenstein
- · Replies 2 ·
Graduate Guessing the experiment performed in I' by observers from I
- bernhard.rothenstein
- · Replies 2 ·
Graduate Of sailing and relativity and titillating patterns
- DaveC426913
- · Replies 2 ·
Graduate Evaluating the Elapsed Time Difference Between Clocks in a Gravitational Field
- MeJennifer
- · Replies 1 ·
Graduate Painleve-Gullstrand coordinates
- pervect
- · Replies 3 ·
Graduate Metric Elements and Einstein Equations in a Variable-Dependent Formulation
- eljose
- · Replies 3 ·
Graduate Understanding Violation of Causality: Explained by Reference Frames
- David Laz
- · Replies 5 ·
Graduate Gravitational waves and negative energy.
- alias25
- · Replies 8 ·
Graduate Questions on Black Holes - Answers Wanted
- Markrids
- · Replies 11 ·
Graduate Spacetime in Newtonian kinematics
- jcsd
- · Replies 1 ·
Graduate Why does time slow down when traveling at high speeds?
- blahblahblah12345
- · Replies 10 ·
Graduate Are the Spaceships' Worldlines Straight in Relativity?
- MeJennifer
- · Replies 7 ·
Undergrad Why is Time Relative? - Understand the Concept
- onestarburns
- · Replies 43 ·
Graduate Is the Mass of a Cube of Matter Determined by Its Total Energy?
- quasar987
- · Replies 15 ·
High School Gravity Barrier: Facts & Explanation
- shelpdogg
- · Replies 8 ·
Graduate Spacetime Curvature: Exploring Stephen Hawking's The Universe in a Nutshell
- Leonardo Sidis
- · Replies 13 ·
Graduate Can Gravitons Escape Black Holes?
- eep
- · Replies 33 ·
Graduate Does Warping Spacetime Generate Mass?
- daniel_i_l
- · Replies 1 ·
Graduate Gravity & Curvature: Explaining Geometrical Orbit of Particles
- blumfeld0
- · Replies 38 ·
Graduate What causes a marble slab to become a non-Euclidean continuum?
- pervect
- · Replies 12 ·
Graduate Relativity Principle: Is Privileged Frame Possible?
- Born2Perform
- · Replies 16 ·
Graduate Absolute Motion: Can Wristwatches Prove It?
- actionintegral
- · Replies 14 ·
Graduate Time Dilation Explained: SR vs GR | Modern Physics by Taylor and Zalifatos
- OS Richert
- · Replies 38 ·
Graduate Mathmatics Needed: Learn Special & General Relativity
- THE 1
- · Replies 7 ·
Undergrad Is E=MC2 the Complete Equation for Energy-Mass Relation?
- ravisastry
- · Replies 34 ·
Graduate Can Charge Affect the Event Horizons of Black Holes?
- Quaoar
- · Replies 11 ·
Graduate Is Everything in the Universe Just Space-Time Geometry?
- himura_kenshin
- · Replies 12 ·
Graduate Interpreting GR: Is Spacetime Geometry Necessary?
- kvantti
- · Replies 3 ·
Graduate Conserving Lorentz Invariant Momentum in Particle Collisions
- MetaJoe
- · Replies 3 ·
Graduate Mass of a Singularity: Hawking's Explanation
- Born2Perform
- · Replies 5 ·
Undergrad Matter-Energy Conversion: Gravity & Speed Questions
- Nahaz
- · Replies 9 ·
Graduate Question About Special Relativity
- RabidSmurf
- · Replies 17 ·
Graduate Hollow spherical blackhole thought experiment
- Instine
- · Replies 144 ·
Graduate Can SR fully explain magnetic force?
- Sheyr
- · Replies 7 ·
Graduate Same experiment performed in different inertial reference frames
- bernhard.rothenstein
- · Replies 5 ·
Graduate What is the Relative Speed of Photons in Opposite Directions?
- nighthelios
- · Replies 15 ·
Undergrad Twins in Motion: A Thought Experiment on Relative Speed and Age Differences
- Born2Perform
- · Replies 24 ·
Graduate Do the laws of relativity hold true for all forms of media?
- friendkey
- · Replies 17 ·
Graduate Doppler Effect & Einstein's Theory: Explained & Proven?
- physicsignoramus
- · Replies 9 ·
Graduate What is the Relationship Between Time and Gravity in the Early Universe?
- MeJennifer
- · Replies 16 ·
Graduate Why aren't electrons considered black holes ?
- Quaoar
- · Replies 18 ·
Graduate Stress-Energy tensor of a rotating disk
- pervect
- · Replies 2 ·
Graduate Are you sure that objects which moves enought fast are not black holes?
- Born2Perform
- · Replies 3 ·
Graduate Calculating Mass-Energy of a System Without Using Pseudotensors
- tim_lou
- · Replies 35 ·
Graduate A question about the rationale of SR?
- AltCtrlDel
- · Replies 15 ·
Undergrad Light Speed: Consequences of Relativistic Speeds
- blimkie
- · Replies 3 ·
Graduate Common misconceptions of cosmological horizons and superluminal expansion
- Robert100
- · Replies 3 ·
Graduate General relativity and time dilation
- Joe1
- · Replies 6 ·
Graduate Length and time for a given metric
- wandering.the.cosmos
- · Replies 1 ·
Graduate Is There Any Scientific Evidence Supporting the Idea of Viewing the Future?
- oneodubleo
- · Replies 1 ·
Graduate Determinant g = g_{00} det |g_{ij}|
- wandering.the.cosmos
- · Replies 5 ·
Graduate Does Antigravity Have a Basis in Justifiable Physics?
- argonurbawono
- · Replies 3 ·
Special Relativity Day: Albert Einstein's 1905 Theory
- neutrino
- · Replies 1 ·
Graduate GR Background Independence: Indeterminate and Non-local?
- RandallB
- · Replies 25 ·
Graduate The Mystery of Gravity: Unraveling the Cause of the Fundamental Force
- hover
- · Replies 13 ·
Graduate The Completeness of the Kruskal Extension: A Flaw in the Black Hole Solution?
- pervect
- · Replies 8 ·
Graduate Does the Velocity of Magnetic Field Effects Violate Maxwell's Equations?
- yogi
- · Replies 5 ·
Graduate Gravity / equivalence principle
- jbusc
- · Replies 10 ·
Undergrad Light clock and teaching of special relativity
- bernhard.rothenstein
- · Replies 12 ·
Undergrad How Long Would Earth Lose Sun's Gravity? - Helical
- Helical
- · Replies 3 ·
Graduate Einstein did not derive E =mc2 first
- ajay22444
- · Replies 38 ·
Graduate Is the Terrell-Penrose Effect accurately depicted in these animations?
- clj4
- · Replies 6 ·
Graduate Why Twins Feel Different Speeds on Opposite Carousels
- whoelsebutme
- · Replies 5 ·
Graduate Gravitational time dilation due to one's own mass
- DiamondGeezer
- · Replies 8 ·
Graduate Is There a Limit to Temperature in Relativistic Thermodynamics?
- gijeqkeij
- · Replies 7 ·
Graduate Does the Twins Paradox Always Hold True for Inertial and Non-Inertial Observers?
- Al68
- · Replies 11 ·
Graduate How Does Relativistic Deceleration Affect Velocity Calculations in Space Travel?
- Al68
- · Replies 70 ·
Undergrad Calculate Time Difference: Relativity Equation for Sun and Earth Masses
- kajak
- · Replies 4 ·
Graduate How do you prove the relationship between electromagnetic and metric tensors?
- Emanuel84
- · Replies 3 ·
Graduate What Color Would a Light Beam Appear While Chasing It at 0.999c?
- Quantum1332
- · Replies 6 ·
Graduate Black holes and scientific fraud
- Crothers
- · Replies 10 ·