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 Energy Tensor Gradients: ∂βTμυ
- dsaun777
- · Replies 5 ·
Undergrad Allowed transformations in General Relativity
- kent davidge
- · Replies 12 ·
Undergrad What does it mean for a spinor to transform under a representation?
- AndrewGRQTF
- · Replies 4 ·
High School Time dilation and light signals at relativistic speeds
- skyshrimp
- · Replies 2 ·
High School Do satellite clocks need adjustment for both special and general relativity?
- Zack K
- · Replies 5 ·
Undergrad Why does gravitational time dilation give larger radius for smaller time ratio?
- Zman
- · Replies 2 ·
Undergrad Does Special Relativity Deal with Non-Inertial Frames?
- Logic314
- · Replies 21 ·
High School Can we truly understand the concept of time?
- Levi Woods
- · Replies 42 ·
Undergrad Why Do Lorentz Transforms Look Like This?
- AndrewGRQTF
- · Replies 1 ·
High School Muons traveling to Earth, time dilation question
- Glenn G
- · Replies 7 ·
High School Why does negative energy always escape in Hawking radiation?
- Robert Friz
- · Replies 12 ·
High School Why does sunlight take 8 minutes to reach Earth?
- kent davidge
- · Replies 23 ·
Undergrad Can energy be harnessed from black holes for use on Earth?
- luke m
- · Replies 8 ·
Undergrad Twin paradox with symmetric travelers at 3c/5
- 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 Does charge add to relativistic mass-energy?
- 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 Does coordinate change induce gravity in the Schwarzschild metric?
- jk22
- · Replies 5 ·
Undergrad Why do different authors get different factors in the Riemann tensor formula?
- victorneto
- · Replies 1 ·
Undergrad How can charge and angular momentum be measured in black holes?
- CalcNerd
- · Replies 7 ·
Undergrad Does the commutator of vector fields have geometric meaning?
- 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 Is there a connection between the inhomogeneous wave equation and the spacetime interval?
- Prez Cannady
- · Replies 2 ·
Graduate Why use a tetrad instead of an orthonormal coordinate basis
- Higgsono
- · Replies 51 ·
Undergrad Simultaneity on a moving train
- west-river
- · Replies 41 ·
Undergrad Why does a stationary object near Earth accelerate in general relativity?
- 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 Does negative mass create white holes instead of black holes?
- abdirahman dahir
- · Replies 2 ·
High School Does infinite time pass outside when crossing a black hole's event horizon?
- 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 Can you distinguish acceleration from gravity in a sealed elevator?
- Jim Hammond
- · Replies 18 ·
Undergrad Can relational dynamics address time before the big bang?
- fresh_42
- · Replies 2 ·
High School If I travel at 0.5c from the sun, why does redshifted light still reach me 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 Why doesn't relativistic velocity subtraction give exact values?
- 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 Relativity of simultaneity with three moving observers
- learning
- · Replies 4 ·
Undergrad Can all tensor concepts be derived from metric invariance?
- kent davidge
- · Replies 3 ·
High School Why do twin paradox observers age differently if each feels time passes normally?
- 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 does gravity affect it?
- tylerfarzam
- · Replies 6 ·
Undergrad How do you get from the field equations to the geodesic equation?
- 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 gradient imply 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 Linking the second law of thermodynamics to closed timelike curves in GR
- mollwollfumble
- · Replies 2 ·
Undergrad Is the Speed of Light Bidirectional in an Expanding Universe?
- Tracer
- · Replies 31 ·
High School Why does acceleration history not affect special relativity calculations?
- Martyn Arthur
- · Replies 14 ·
Undergrad Acceleration vs Gravity in General Relativity
- bgq
- · Replies 2 ·
High School Ball thrown from moving spaceship at relativistic speed
- NoahsArk
- · Replies 10 ·
Graduate Killing vector notation confusion time translation
- binbagsss
- · Replies 6 ·