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 Hawking Radiation and Shrinking Black Holes
- Robert Friz
- · Replies 12 ·
High School Sun Time vs Earth Time: Lorentz Transformations?
- kent davidge
- · Replies 23 ·
Undergrad Harnessing Energy from Black Holes: Possibility or Fantasy?
- luke m
- · Replies 8 ·
Undergrad Extended Twin Paradox: Explaining Time Lapse and Symmetry Principle
- JustTryingToLearn
- · Replies 3 ·
High School Solve FTL Problem with Faraday Cage and Relativity Theory
- Orest
- · Replies 2 ·
Undergrad How Do David and John Experience Proper Time Differently in Special Relativity?
- Pericles98
- · Replies 18 ·
Undergrad Can Gravitational Waves Affect Light Wavelengths?
- cianfa72
- · Replies 11 ·
High School Can Curving a Space-Cone Create a Black Hole?
- swampwiz
- · Replies 5 ·
High School Relativistic Mass-Energy: Charge & Particles
- 1977ub
- · Replies 3 ·
High School Gravitational Redshift and its effects on Photon
- Arman777
- · Replies 15 ·
High School Is Spacetime Truly a Finished Block or an Open-Ended Concept?
- Joao
- · Replies 6 ·
Undergrad Acceleration Frame Dependency - General Relativity
- kent davidge
- · Replies 3 ·
Undergrad Calculate mass from time dilation
- aneikei
- · Replies 20 ·
Graduate Derivation of the Noether current - Lorentz Transformation
- Higgsono
- · Replies 7 ·
High School Do Permanent Magnets Bend Spacetime? Basic Thread
- Dante Meira
- · Replies 7 ·
Undergrad Find Tangent Vector to Curve in 2D Cartesian Coordinates
- Apashanka
- · Replies 11 ·
High School Cause of time dilation when net gravity is zero
- DaveC426913
- · Replies 37 ·
Undergrad Contravariant derivative of tensor of rank 1
- Apashanka
- · Replies 8 ·
Undergrad Coordinate Change & Gravity: A Schwazschild Metric Analysis
- jk22
- · Replies 5 ·
Undergrad Riemann Tensor: Questions & Geometric Interpretation
- victorneto
- · Replies 1 ·
Undergrad Measuring Charge & Angular Momentum in Black Holes
- CalcNerd
- · Replies 7 ·
Undergrad The Commutator of Vector Fields: Explained & Examples
- Zhang Bei
- · Replies 1 ·
Undergrad Varying The Relativistic Action
- Luke Tan
- · Replies 11 ·
Undergrad Why is √(gμνdxμdxν) the Lagrangian for Geodesic Eq?
- Apashanka
- · Replies 12 ·
Graduate Einstein's Definition of Mass: m = E/c^2
- nikkor180
- · Replies 3 ·
High School Does the mass of an object increase in a gravitational field?
- Buckethead
- · Replies 65 ·
High School Measuring Michelson–Morley light beams
- P J Strydom
- · Replies 62 ·
High School Gravitational force of the Earth and Moon
- akhila_k
- · Replies 14 ·
High School Gravitational waves for data communication?
- alan123hk
- · Replies 23 ·
Undergrad Doppler like effect affecting observed time for a moving object
- Eismcsquared
- · Replies 1 ·
Undergrad Second Derivative of Time Dilation Equation
- Eismcsquared
- · Replies 2 ·
Undergrad Minus sign in Minkovsky´s metric
- DaTario
- · Replies 49 ·
Undergrad Inhomogeneous Wave Eq. & Minkowski Spacetime Interval
- Prez Cannady
- · Replies 2 ·
Graduate Understanding the Tetrad Formalism in General Relativity
- Higgsono
- · Replies 51 ·
Undergrad Simultaneity on a moving train
- west-river
- · Replies 41 ·
Undergrad Gravity in General Relativity: Explaining Acceleration
- nikkor180
- · Replies 9 ·
Undergrad Zero Gravity Near a Black Hole?
- xshovelfighter
- · Replies 2 ·
Undergrad Detect Negative Mass Matter: Experiments in Solar System
- Christofer Br
- · Replies 2 ·
High School Minkowski Diagram: Expanding Universe
- sqljunkey
- · Replies 3 ·
Graduate Action for a relativistic free particle
- Higgsono
- · Replies 9 ·
Undergrad Negative Mass & White Holes: Does It Create?
- abdirahman dahir
- · Replies 2 ·
High School What Happens When We Cross the Event Horizon of a Black Hole?
- Higgsono
- · Replies 21 ·
Undergrad Is a clock on the equator time dilated?
- Grimble
- · Replies 8 ·
High School Can gravitational time dilation explain the photon's deflection near the Sun?
- jeremyfiennes
- · Replies 46 ·
Undergrad Orbital Simulator with general relativity
- darkdave3000
- · Replies 18 ·
Undergrad How does everything move at C through spacetime?
- Joe30174
- · Replies 5 ·
Graduate How Does the Four-Way Vector Operation Relate to Potential Energy in Gravity?
- Jonathan Scott
- · Replies 5 ·
Undergrad Lorentz Transformation in One-Dimensional Space
- the_emi_guy
- · Replies 4 ·
Undergrad Maximally extended Schwarzschild spacetime
- Ibix
- · Replies 14 ·
High School Speed of Light -- Why doesn't it add to the speed of the emission source?
- PhDnotForMe
- · Replies 10 ·
Undergrad Einstein's Elevator: Gravity vs Acceleration
- Jim Hammond
- · Replies 18 ·
Undergrad Time Before Big Bang: Relational Dynamics & Singularities
- fresh_42
- · Replies 2 ·
High School Travel at 0.5c & Observe Redshifted Light Traveling at c
- Frederick T
- · Replies 4 ·
Undergrad Find E' in FLP Volume 1 17.4: Why Does It Work?
- Special K
- · Replies 2 ·
Graduate Levi Civita - SO(4) Group Theory: Proving Relation in Landau and Lifshitz
- Nusc
- · Replies 7 ·
Undergrad Locally inertial reference frame problem
- Pencilvester
- · Replies 4 ·
Undergrad What is the canonical form of the metric?
- George Keeling
- · Replies 8 ·
High School Take on Length Contraction at relativistic speeds
- Simi
- · Replies 115 ·
High School Beyond the Black Hole Singularity
- Kanishka Toshniwal
- · Replies 6 ·
Undergrad Can two inertial frames differ by the speed of light?
- Logic314
- · Replies 15 ·
Graduate Einstein Field Equations: Covariant vs Contravariant
- Prez Cannady
- · Replies 4 ·
Undergrad Solve General Relativity "Paradox" w/ Automatic Diff. ODE Solver
- m4r35n357
- · Replies 3 ·
Undergrad Understanding the Relative Velocity Paradox
- x0tek
- · Replies 13 ·
High School Struggles with the geometrical analogy
- whatif
- · Replies 62 ·
High School Verifying Time Effect of Gravity: Accurate to a Few Thousands of a Percent
- FactChecker
- · Replies 3 ·
Undergrad Computer Performance Evaluation (CPE)
- for_more_ken
- · Replies 8 ·
Undergrad Why is the Energy Momentum Tensor of a Perfect Fluid a Tenso
- klpskp
- · Replies 10 ·
High School Understanding Special Relativity: 2nd Year SR Course Explained
- starstruck_
- · Replies 4 ·
Undergrad Do we have to accept the physical existence of time?
- learning
- · Replies 23 ·
High School Einstein's definition of synchronization
- Jonathan Stanley
- · Replies 23 ·
High School I got confused about SR after trying to reply to another
- learning
- · Replies 4 ·
Undergrad Einstein & Relativity: Metric, Tensor Fields, Scalar Product
- kent davidge
- · Replies 3 ·
High School Time Dilation Theory Flaw: How Can They Be Different Ages?
- Chris S
- · Replies 17 ·
Undergrad Confusion about Einstein notation
- TimeRip496
- · Replies 9 ·
Graduate Distinguishing Riemannian Manifolds by Curvature Relationships
- tasguitar7
- · Replies 2 ·
High School Big Bang Theory: If There's No Center, How Is Universe Infinite?
- RandyD123
- · Replies 3 ·
High School Does Energy Have Mass and Other Beginner Physics Questions?
- tylerfarzam
- · Replies 6 ·
Undergrad Solve General Relativity Equation: Steps & Tips
- The black vegetable
- · Replies 4 ·
High School What is wrong with gravity equations?
- Spacepantz86
- · Replies 1 ·
Undergrad EM Lagrangian: Question on $(\partial_\mu A^\mu)^2$ Term
- -marko-
- · Replies 2 ·
High School Does time dilation prove the existence of an absolute zero velocity?
- Robert Rapplean
- · Replies 23 ·
High School Gravitational waves of moving or vibrating masses
- yahastu
- · Replies 19 ·
Graduate Electromagnetic tensor and time reversal
- Andrea B DG
- · Replies 6 ·
Undergrad Favorite Visualization of General Relativity?
- Devin Powell
- · Replies 40 ·
Undergrad Connection between entropy and time travel?
- mollwollfumble
- · Replies 2 ·
Undergrad Is the Speed of Light Bidirectional in an Expanding Universe?
- Tracer
- · Replies 31 ·
High School Special Relativity & Acceleration: Unequal Inertial Frames
- Martyn Arthur
- · Replies 14 ·
Undergrad Acceleration vs Gravity in General Relativity
- bgq
- · Replies 2 ·
High School Velocity Addition Q: Ball Thrown from Moving Ship?
- NoahsArk
- · Replies 10 ·
Graduate Killing vector notation confusion time translation
- binbagsss
- · Replies 6 ·
Undergrad Escape Velocity: Newtonian vs Relativistic
- sha1000
- · Replies 18 ·
High School Learning Lorentz Derivation: Solving x=vt+γx' vs. x=vt+x'/γ
- jeremyfiennes
- · Replies 38 ·
Undergrad Why Not Develop Relativistic Gravitational Theory Analogy to Electromagnetism?
- MichPod
- · Replies 8 ·
High School What is the meaning of the famous equation E=mc^2?
- PhDnotForMe
- · Replies 13 ·
Undergrad Killing Equation: Why Set g_μν,ρ V^ρ = 0?
- kent davidge
- · Replies 8 ·
Undergrad Lorentz Transform of E and B: Considerations by DJ Juggernaut
- Sorcerer
- · Replies 1 ·
High School Is the Lorentz transformation about observers?
- jeremyfiennes
- · Replies 9 ·
High School Moving Charge in a Magnetic field Problem
- DJ_Juggernaut
- · Replies 28 ·
High School Basic Lorentz transformation derivation
- jeremyfiennes
- · Replies 84 ·
Undergrad Time dilation for the Earth's orbit around the Sun
- DanMP
- · Replies 58 ·