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 Light cones in faster than light travel
- mcmagicman530
- · Replies 2 ·
High School Einstein's Equation: E=MC2 Explained
- Xyooj
- · Replies 12 ·
Graduate How can the Rindler metric be derived for a uniform gravitational field?
- snoopies622
- · Replies 14 ·
Graduate Bouncing light question faster than c?
- RespeckKnuckl
- · Replies 5 ·
Graduate The Mysteries of Light: Understanding its Characteristics and the Speed Limit
- shamrock5585
- · Replies 25 ·
Graduate Gravitational potential from QM-like phase
- Jonathan Scott
- · Replies 2 ·
Graduate Metric Tensor Question: Special Relativity
- Someone1987
- · Replies 2 ·
Graduate Proving that the scalar product is invariant
- Someone1987
- · Replies 2 ·
Undergrad What physically happens to the object as it increases in mass
- mr-tom
- · Replies 5 ·
Graduate Bondi k and everyday clock synchronization
- bernhard.rothenstein
- · Replies 5 ·
Graduate Is Faster-than-Light Travel Possible with Constant Acceleration?
- nahkaimurrao
- · Replies 42 ·
Graduate Uniqueness of solutions to EFE?
- Hurkyl
- · Replies 3 ·
Graduate Comparing Charge and Gravity: Do They Follow the Same Rules of Motion?
- duordi
- · Replies 19 ·
Graduate Would the Pendulum's Shadow Vibrate at PHz on a Moving Wall?
- Hippasos
- · Replies 4 ·
Graduate Why Does Understanding GPS and Relativity Matter for Black Hole Exploration?
- OS Richert
- · Replies 7 ·
Graduate Principle of relativity and energy?
- FeynmanMH42
- · Replies 11 ·
Graduate Does charge change with velocity?
- duordi
- · Replies 8 ·
Graduate Watching young's double slit experiment in moving frame
- Sourabh N
- · Replies 12 ·
Graduate Synchronization Gauge Definition | What is it?
- bernhard.rothenstein
- · Replies 1 ·
Graduate Conservation of Energy in GR - Is Potential Energy Still Valid?
- mysearch
- · Replies 5 ·
Undergrad Gravity as Expansion: How Do Orbits Stay Constant?
- breedb
- · Replies 2 ·
Graduate How does light travel at its speed without infinite mass?
- Dave9600
- · Replies 28 ·
Graduate What Are Closed Timelike Curves?
- Champion
- · Replies 2 ·
Graduate Massless Particles: At Rest & Why?
- mite
- · Replies 13 ·
Graduate Twins Paradox in a Quasi-Uniform Gravitational Field | A Sci-Fi Exploration
- Al68
- · Replies 16 ·
Undergrad GRAVITY its time we figured it out.
- Thebrokentree
- · Replies 16 ·
Graduate Understanding the Relationship Between Energy, Mass, and Momentum in Relativity
- mysearch
- · Replies 5 ·
Graduate Does massless particles experience gravity
- mite
- · Replies 6 ·
Graduate Riemann curvature tensor as second derivative of the metric
- jdstokes
- · Replies 2 ·
Graduate How Does Photon Momentum Exist Without Mass?
- jspstorm
- · Replies 7 ·
Graduate Does Light Bend Spacetime and Have a Gravitational Pull?
- Tomtom
- · Replies 9 ·
Graduate What is the cause of spacetime curvature?
- physlad
- · Replies 6 ·
Undergrad Do Clocks Run Slower in Weaker Gravitational Fields?
- bobbyk
- · Replies 9 ·
Graduate Robertson-Walker metric in higher dimensions (and problematic Riemann tensor)
- wildemar
- · Replies 4 ·
Graduate Sum of the forces and torques = 0
- aranoff
- · Replies 20 ·
Graduate What exactly is stopping us from unifying GR and quantum mechanics?
- epkid08
- · Replies 26 ·
Graduate What is the Origin of the Spatial Metric in Non-Inertial Frames?
- jdstokes
- · Replies 4 ·
Undergrad Speed of civilisation development
- northcave
- · Replies 8 ·
Undergrad Relative Velocity: Henrik's Understanding
- Hernik
- · Replies 2 ·
Graduate Effect of acceleration on space-time fabric
- mite
- · Replies 1 ·
Undergrad What is the Reason Behind the Speed of Light?
- rogerp
- · Replies 42 ·
Graduate Is Time Travel Possible and Already Happening in Our World?
- epkid08
- · Replies 40 ·
Graduate How Do Covariant, Contravariant, and Mixed Tensors Transform?
- Reedeegi
- · Replies 1 ·
Graduate Matrix Representation of Tensors?
- Reedeegi
- · Replies 4 ·
Graduate Is the ds² Expression for a Uniform Gravitational Field Correct?
- snoopies622
- · Replies 7 ·
Graduate A new angle on the Right Angle Lever Paradox.
- yuiop
- · Replies 27 ·
Graduate What's the G-forces in a black hole event horizon?
- gaming_addict
- · Replies 7 ·
Graduate Revised Twin Paradox: What's Wrong?
- dkgolfer16
- · Replies 44 ·
Graduate Another Schwarzschild question
- snoopies622
- · Replies 38 ·
Graduate Is this a valid derivation of E=mc^2?
- dontbesilly
- · Replies 12 ·
Graduate A question about the speed of light puzzles me
- yeti1112007
- · Replies 4 ·
High School Michelson-Morley experiment proves nothing
- yeti1112007
- · Replies 11 ·
Graduate Understand Einstein Hole Argument: Norton's Expln & General Covariance
- ecce.monkey
- · Replies 57 ·
Graduate Gravitational Theory, Don´t grasp it.
- Moris526
- · Replies 5 ·
Graduate How is velocity defined in relativity and who measures it?
- Nizzeberra
- · Replies 9 ·
Undergrad What Makes the Speed of Light So Special in Physics?
- km90
- · Replies 2 ·
Graduate Bends in Space-Time vs Invariance
- WCOLtd
- · Replies 1 ·
Graduate How are Coordinates Defined in General Relativity?
- jdstokes
- · Replies 5 ·
Graduate Another speed of light question
- orgmark
- · Replies 56 ·
Graduate Do Extra Dimensions Really Matter Before String Theory?
- tnadys
- · Replies 1 ·
Graduate Derivative of metric tensor with respect to itself
- jdstokes
- · Replies 5 ·
Undergrad How does Einstein's model explain the relationship between gravity and energy?
- liam.buchanan
- · Replies 11 ·
Graduate How two clocks can each run slow in the other's reference frame
- jtbell
- · Replies 8 ·
Graduate Gravity in relation to mass & energy
- Denton
- · Replies 19 ·
Graduate Two Easy Questions: Mass & Speed Limit of C
- epkid08
- · Replies 27 ·
Graduate Uniting quantum physics with the theory of relativity
- Bjarne
- · Replies 7 ·
Graduate Why are clocks at opposite ends of an accelerating ship out of sync in the rest frame?
- PatPwnt
- · Replies 2 ·
Graduate What Happens When a Mechanism Reaches the Speed of Light?
- UltraViolet
- · Replies 13 ·
Graduate The hole argument and diffeomorphism invariance
- hellfire
- · Replies 4 ·
Graduate Behavior of light accelerating
- Chatt
- · Replies 2 ·
Graduate Velocity and proper acceleration
- rhz_prog
- · Replies 1 ·
Undergrad What Do We Understand About Gravity?
- orgmark
- · Replies 23 ·
Graduate Do Closed Timelike Curves Exist?
- twoface42
- · Replies 31 ·
Graduate Are There Any Neater Solutions for Notation Confusion in Metric Equations?
- DrGreg
- · Replies 12 ·
Undergrad Time dilation also for accelarated motion?
- Rhian
- · Replies 1 ·
Undergrad Reexamining Time Dilation: A Perspective from Both Frames of Reference
- armaan
- · Replies 2 ·
Graduate Define Electromagnetic Spacetime
- Lorensatcho
- · Replies 8 ·
High School Gravity After Mass Conversion to Energy - Layman's Guide
- teroenza
- · Replies 3 ·
Graduate Why Does the Simultaneity Equation Use Gamma Squared?
- skynelson
- · Replies 1 ·
Graduate Why Does the Standard Model Not Account for the Mass of Potential Energy?
- beeresearch
- · Replies 6 ·
Graduate Coming to terms with the velocity addition formula
- adimare
- · Replies 1 ·
Graduate What motivated Einstein to develop GR?
- quasar987
- · Replies 9 ·
Graduate Thought Experiment: Spaceship, Photon, and Relativity Explained in Simple Terms
- Chatt
- · Replies 3 ·
Graduate Understanding the Kerr Metric: Solving for Delta and Lambda functions
- Orion1
- · Replies 2 ·
Undergrad Why do radio and gamma photons arrive at the same time?
- Applemush
- · Replies 58 ·
Graduate Who Ages Faster in Relativistic Travel?
- phja
- · Replies 1 ·
Graduate Is the Shapiro Delay a Result of Space Curvature or Time Dilation?
- Zman
- · Replies 1 ·
Graduate Space Dilation in General Relativity: Facts, Measurement & Sources
- Zman
- · Replies 9 ·
Graduate Geometric Algebra and Spacetime Split: What are the Applications?
- heafnerj
- · Replies 2 ·
Graduate SR and Light Clocks - Confused
- aeromedic
- · Replies 24 ·
Graduate If the speed of light were zero
- WillBlake
- · Replies 5 ·
Graduate How does relative motion affect the speed of light?
- mtworkowski@o
- · Replies 27 ·
Graduate Gravitational time dilation from two or four bodies
- shalayka
- · Replies 7 ·
Graduate Third postulate of special relativity?
- zonde
- · Replies 13 ·
Graduate Question about pressure in GR
- bunburryist
- · Replies 15 ·
Poincaré's 1900 paper on Lorentz's theory
- sal
- · Replies 13 ·
Graduate Gravitational Collapse: Is Mass Referring to Rest Mass?
- nomadreid
- · Replies 2 ·
Graduate Backscattering of light at a black hole
- MasterD
- · Replies 1 ·
Graduate Accelerations at various distances.
- g_sanguinetti
- · Replies 29 ·
Graduate How Does Relativity Change at High Velocities and Small Distances?
- devronious
- · Replies 2 ·