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 Gaussian normal coordinates and Riemann normal coordinates
- Ken Gallock
- · Replies 7 ·
High School Is the Andromeda Paradox accepted in physics?
- TheQuestionGuy14
- · Replies 40 ·
Undergrad Proving Geodesics in Hyperbolic Geometry
- ChrisJ
- · Replies 15 ·
High School Near Light Speed Runner: Will We See the Light?
- lovicodo
- · Replies 7 ·
Undergrad Connection Types: Affine vs Non-Affine
- kent davidge
- · Replies 2 ·
High School Which Watch Will Have Slower Time: Object 1 or Object 2?
- Sandip Patel
- · Replies 37 ·
Undergrad Gravitational Effects on Age of Earth's Core
- Freonpsandoz
- · Replies 4 ·
Undergrad Bijectivity of Manifolds: Can m≠n?
- kent davidge
- · Replies 2 ·
Undergrad Why are direct sums of Lorentz group representations important in physics?
- tomdodd4598
- · Replies 4 ·
Undergrad Displacement vector in general relativity
- kent davidge
- · Replies 9 ·
High School Is Spacetime Really a Block Where All Moments Exist Simultaneously?
- NoahsArk
- · Replies 50 ·
Undergrad Time dilatation thought experiment
- Simi
- · Replies 31 ·
High School Is the speed of light constant to all observers?
- TheQuestionGuy14
- · Replies 25 ·
Undergrad Newtonian analogue of energy-momentum relation?
- greypilgrim
- · Replies 14 ·
Undergrad Motion of Null, Timelike & Spacelike Particles
- Nusc
- · Replies 6 ·
Undergrad Why Don't We Detect Gravitational Shadows?
- Mr J
- · Replies 2 ·
Undergrad Measuring Star Radii with General Relativity
- Natchanon
- · Replies 3 ·
Undergrad Are wormholes and tachyon fields unified?
- BadgerBadger92
- · Replies 2 ·
Undergrad Writing Metric in Matrix Form: Method?
- ChrisJ
- · Replies 4 ·
Undergrad Convert Metric Tensor to Gravity in GR
- max_zhou
- · Replies 12 ·
Undergrad Does S-T Curvature Change Particle Shape?
- Hugh de Launay
- · Replies 16 ·
Undergrad Are All Particle-Rest Inertial Frames the Same?
- PFfan01
- · Replies 4 ·
Undergrad Is current in a wire frame-specific?
- DJ_Juggernaut
- · Replies 9 ·
Undergrad Is energy-momentum invariant and/or conserved?
- greypilgrim
- · Replies 7 ·
High School Why does a LIGO arm stretch and not move in unison?
- Henri Garcia
- · Replies 46 ·
Graduate Hawking and Unruh effects -- Differences and interpretations
- Joker93
- · Replies 16 ·
High School Lorentz Invariant Paths in Spacetime
- snoopies622
- · Replies 6 ·
Undergrad How Many Gravitons Were Detected in Recent Gravity Wave Observations?
- snorkack
- · Replies 58 ·
Undergrad Electric & Magnetic Fields Inside Conducting Wires
- bob012345
- · Replies 14 ·
Undergrad Quantum Mechanics in Spacetime: Is it Discrete?
- jaketodd
- · Replies 9 ·
High School Another spaceship and two points question....
- TomTelford
- · Replies 34 ·
Undergrad GR vs Newtonian Physics: Mass Curving Spacetime & Gravity Effects
- Justin Hunt
- · Replies 9 ·
High School Does Negative Mass Have Physical Significance in Modern Theories?
- snoopies622
- · Replies 5 ·
Undergrad Modern Definition of Mass: Does a Photon Have It?
- msumm21
- · Replies 7 ·
Undergrad Inertial Frames: Constant Quantities?
- Zahid Iftikhar
- · Replies 17 ·
High School Gravity Deflects Light & Massless Particles: Einstein & Susskind
- jeremyfiennes
- · Replies 8 ·
Undergrad Is Mathematics a Paradigm of Truth in General Relativity?
- Ittiandro
- · Replies 1 ·
Undergrad Can Black Holes Store More Information Than We Think?
- Spas Stoilov
- · Replies 19 ·
High School What Theories Explain the Black Hole Paradox?
- Pallavi
- · Replies 12 ·
Undergrad Black Hole Stability Conjecture: Why Is It Important?
- Suzanne Rosenzweig
- · Replies 5 ·
Undergrad Intuitive explanation for Riemann tensor definition
- t_r_theta_phi
- · Replies 8 ·
High School Math-Based Time Dilation Paper: Seeking Suggestions
- Philip Norheim
- · Replies 12 ·
High School Questions about the relativistic kinetic energy expressions
- Ricardo
- · Replies 58 ·
High School How do physicists know that the past is immutable?
- benorin
- · Replies 4 ·
High School Time Perception: Is It Different from Time Dilation?
- TheQuestionGuy14
- · Replies 5 ·
Graduate Energy distribution on Alcubierre walls
- Eytan Suchard
- · Replies 7 ·
Undergrad Why is Displacement Current Excluded from Four-Current?
- particlezoo
- · Replies 5 ·
Undergrad Deriving Lorentz Transformation
- Arman777
- · Replies 22 ·
Undergrad Gravitational time dilation derivation
- kairama15
- · Replies 3 ·
High School Tidal Forces When Falling into a Black Hole
- jartsa
- · Replies 14 ·
High School Observing a Beacon Impact a Neutron Star/Event Horizon
- Grinkle
- · Replies 10 ·
Undergrad If time doesn't pass at the event horizon, how is it crossed?
- Martin_K
- · Replies 24 ·
High School Can Closed Timelike Curves Violate Entropy by Allowing Time Travel?
- TheQuestionGuy14
- · Replies 9 ·
High School Do Open Timelike Curves Exist?
- TheQuestionGuy14
- · Replies 5 ·
Undergrad Weyl Transformation of Metric: Cosmological Inflation
- Safinaz
- · Replies 1 ·
Undergrad How do you draw a spacetime diagram and what equation describes it?
- runningc
- · Replies 11 ·
High School What would happen if the speed of light were different?
- Hrithik mudaliar
- · Replies 66 ·
High School Closed Timelike Curves vs Time Loops: What's the Difference?
- TheQuestionGuy14
- · Replies 3 ·
Undergrad Transforming Contra & Covariant Vectors
- dyn
- · Replies 12 ·
High School Is it possible to experience time loops?
- TheQuestionGuy14
- · Replies 9 ·
Undergrad Is the Schwarzchild Radius Relativistic or Newtonian?
- bbbl67
- · Replies 75 ·
Undergrad Detecting Crossing Event Horizon w/ "Closed Box" Experiment
- Ibix
- · Replies 3 ·
High School Deriving Energy and Momentum in GR: 4-Component vs. Tensor Approach
- sweet springs
- · Replies 34 ·
High School Question on Schwarzschild Geometry
- nabil23
- · Replies 4 ·
High School Is the gravitational force higher than it should be?
- nabil23
- · Replies 7 ·
Undergrad Deriving Lorentz from time dilation and length contraction
- zox00
- · Replies 23 ·
High School Accounting for the constant speed of light
- grounded
- · Replies 40 ·
Undergrad Do objects appear heavier if they run over a scale very fast
- greypilgrim
- · Replies 30 ·
Undergrad Lorentz Transformation: Explaining Invariance of c?
- DanMP
- · Replies 14 ·
High School Special Relativity Self-Contradiction?
- Jonathan Stanley
- · Replies 13 ·
Undergrad How Does Time Dilation in Special Relativity Affect Clock Synchronization?
- Biker
- · Replies 5 ·
High School How is energy conserved in General Relativity?
- sweet springs
- · Replies 64 ·
High School Momentum in special relativity
- exponent137
- · Replies 49 ·
Undergrad Can Atoms & Baryons Exist Inside a Black Hole?
- harrylentil
- · Replies 3 ·
Undergrad Visual effect in special relativity
- andy95220
- · Replies 14 ·
Undergrad Relativity and Electromagnetism
- RMJ
- · Replies 27 ·
Undergrad Get Relation from Stress-Energy Tensor Def.
- fab13
- · Replies 2 ·
Undergrad Do electrons radiate when in free fall?
- idea2000
- · Replies 13 ·
Undergrad Velocity of Particle vs Inertial Frame Velocity
- Phillipdanbury
- · Replies 10 ·
Undergrad What is the role of the longitudinal rapidity in relativistic contexts?
- SiennaTheGr8
- · Replies 2 ·
Undergrad The Definition of Redshift for Photons
- binbagsss
- · Replies 36 ·
Graduate Time dilation in a magnetic field
- Mr C Odd
- · Replies 7 ·
Undergrad Solving Lorentz Contraction Question: What went Wrong?
- Kaguro
- · Replies 15 ·
Undergrad Is Mathpages the Best Resource for Understanding GR?
- m4r35n357
- · Replies 2 ·
Undergrad Einstein's unidimensional elevator and Rindler coordinates
- cianfa72
- · Replies 29 ·
Undergrad Easiest possible way to derive the Lorentz transformation
- Sorcerer
- · Replies 38 ·
High School Prove Lorentz Factor w/o Speed of Light
- geordief
- · Replies 9 ·
Graduate Can You Have Rest w/o Energy? Schwarzschild vs. Rindler Metrics
- stevendaryl
- · Replies 18 ·
Undergrad Is Velocity Through Spacetime Always Equal to 'c'?
- runningc
- · Replies 44 ·
Undergrad Space & Time Axes Coinciding: Consequences Explored
- Avi Nandi
- · Replies 3 ·
Graduate Schwarzschild Singularity & Black Hole: Same or Different?
- jeremyfiennes
- · Replies 1 ·
Undergrad A variation of the twin paradox
- imsmooth
- · Replies 24 ·
Undergrad Understand Twin Paradox, Leading Clocks Lag & Doppler Effect
- Sorcerer
- · Replies 3 ·
Undergrad Twin Paradox: Travel at Fractional Speed & Instantly Return ##v##
- m4r35n357
- · Replies 15 ·
High School Accelerating Expansion of Cosmos: Measured in Multiple Directions?
- exmarine
- · Replies 7 ·
Undergrad Lorentz Symmetry at Black Hole Event Horizon
- Milsomonk
- · Replies 3 ·
Undergrad Relativistic Simultaneity: A Thought Experiment
- Milsomonk
- · Replies 7 ·
Undergrad Index placement -- Lorentz transformation matrix
- dyn
- · Replies 9 ·
High School Space Curvature & Potential Energy
- PaulCam
- · Replies 5 ·
Undergrad Einstein's Equivalence Principle: Freely Falling Local Frames
- Jazzyrohan
- · Replies 4 ·