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 Gravitational Potential Energy: 1/2 Factor Explained
- t_r_theta_phi
- · Replies 2 ·
Undergrad What does the Einstein tensor actually tell you?
- space-time
- · Replies 7 ·
High School Help With Units in General Relativity
- needved
- · Replies 2 ·
High School Is Time Perception Similar to Browsing the Web?
- pBrane
- · Replies 15 ·
Undergrad Noticing CTC's / time travel in a Godel space-time
- space-time
- · Replies 5 ·
Graduate Riemann Tensor Equation: Simplifying the Riemann-Christoffel Tensor
- redtree
- · Replies 5 ·
Undergrad Spacetime Metric Topology: Does g Induce O?
- nateHI
- · Replies 10 ·
High School Gravitational time dilation depth charge
- tionis
- · Replies 24 ·
Undergrad Modeling the effects of GW and the "Earth Frame"
- GeorgeDishman
- · Replies 66 ·
Undergrad Can one determine the velocity of a photon in the fourth dimension using limits?
- physics22
- · Replies 12 ·
Undergrad Conformal transformation of the line element
- physicality
- · Replies 2 ·
High School Mach's Principle: Understanding the Universe's Rotation Around Us
- WCOLtd
- · Replies 12 ·
Graduate Relationship between metric tensor and position vector
- redtree
- · Replies 2 ·
Undergrad Alice Sees Sudden Acceleration at Event Horizon
- gl0Wyrm
- · Replies 14 ·
Undergrad Understanding Relativistically Spinning Disk/Ring: Lorentz Boosts
- Juxtaroberto
- · Replies 13 ·
Undergrad Effect of Special Relativity on Spacecraft Thrust & Isp
- Sebastiaan
- · Replies 12 ·
High School Can I get clarification on the constant speed of light
- Quandry
- · Replies 53 ·
Graduate Prep for Hawking/Ellis: Point Set Topology Needed
- Andrew Kim
- · Replies 1 ·
Undergrad Comparing Gravitational Waves & Post-Newtonian Approximation
- Vrbic
- · Replies 2 ·
Undergrad What is the Concept of Velocity and Acceleration in General Relativity?
- AngPhysics
- · Replies 2 ·
Undergrad What Actually Happens vs What You See in SR
- Afterthought
- · Replies 6 ·
Insights Spacetime Diagrams of Light Clocks [comments]
- robphy
- · Replies 22 ·
High School Box in gravitational field
- Einstein's Cat
- · Replies 17 ·
High School Could light be slowed down and be observed
- RandyD123
- · Replies 22 ·
Undergrad What is the velocity of the photon through the fourth dimension x4?
- AstroMath
- · Replies 14 ·
High School Light follows Geodesics-Spacetime-Big Bang-Time dilation
- chester20080
- · Replies 11 ·
Undergrad What happens during acceleration in time dilation?
- Electric to be
- · Replies 19 ·
High School Schwarzschild Metric: Non-Rotating Black Holes & Examples
- AleksanderPhy
- · Replies 14 ·
Graduate Relativistic conduction current density?
- ChristopherMDS
- · Replies 3 ·
Undergrad What are the independent components of the Riemann tensor
- Andrew Kim
- · Replies 7 ·
Undergrad Radar Doppler effect: classical vs relativistic
- penelopa
- · Replies 17 ·
Graduate Recognize 1-Way Horizon Coordinate-Independently?
- strangerep
- · Replies 12 ·
Graduate Is there a mathematical proof for the existence of black holes?
- parshyaa
- · Replies 9 ·
Undergrad Christoffel symbols transformation law
- guitarphysics
- · Replies 6 ·
Graduate Derivation of Black Hole Entropy: Hawking & Beckenstein's Arguments
- quickAndLucky
- · Replies 4 ·
Undergrad Time to Form Black Hole? | Observer Slows Time at Event Horizon
- Cobalt101
- · Replies 4 ·
High School Can 5D Kaluza-Klein Theory Be Adapted for 2D Space-Time Models?
- Spinnor
- · Replies 12 ·
Undergrad A light wave and a sound wave travelling together
- freshnfree
- · Replies 7 ·
Undergrad Is Anything Truly at Rest in Every Frame of Reference?
- parshyaa
- · Replies 3 ·
High School If in a lift we can tell if acceleration is due to g or to a push
- alba
- · Replies 4 ·
High School Is there an opposite phenomenon for time dilation ?
- steveJOBS
- · Replies 2 ·
High School Time on 1st & 2nd Floors: Gravity & Light Measurement
- NewToThis
- · Replies 3 ·
High School How can we derive the value of energy in rest mass and the relationship to c^2?
- alba
- · Replies 19 ·
Graduate Weyl Vacua Solutions to GR: Derivation from Riemann Tensor
- redtree
- · Replies 1 ·
Undergrad Solving Mass-Speed Relation Proof Challenges
- anachin6000
- · Replies 5 ·
High School What is the difference between curved spacetime and a field?
- alba
- · Replies 7 ·
Undergrad Explain Relativistic Mass: Special Relativity & F=ma
- ReptileBaird
- · Replies 7 ·
Undergrad Is gravity really not a force according to the weak equivalence principle?
- Figaro
- · Replies 7 ·
Undergrad Godel Solution Metric: Shapes & Descriptions
- space-time
- · Replies 1 ·
High School Speed of Light Invariant in Vacuum: Experiment Proof
- freshnfree
- · Replies 15 ·
Undergrad Past Existence: Can Conjectures Be Tested?
- Randy Subers
- · Replies 3 ·
High School Study Special Relativity: 6th Formers, Books & Websites
- TheAnt
- · Replies 8 ·
High School Understanding the Mystery of Sunlight Bending During a Solar Eclipse
- parshyaa
- · Replies 15 ·
Undergrad Is There a Mistake in My Understanding of Planck Units and Dimensional Analysis?
- facenian
- · Replies 11 ·
High School Can you explain GR without math?
- alba
- · Replies 30 ·
Undergrad Trick for Remembering Schwarzschild Christoffel's/EFE's?
- bolbteppa
- · Replies 4 ·
High School Gravity: Attractive or Repellent? Unanswered Questions
- SaltburnRhys
- · Replies 5 ·
Undergrad Speed of light and speed of sound both constant
- freshnfree
- · Replies 38 ·
High School Einstein's relativity of simultaneity & quantum paradox.
- AstroMath
- · Replies 20 ·
Undergrad Morris-Thorne Wormhole Metric Terms
- space-time
- · Replies 9 ·
Undergrad Correctly Using Lorentz Transformations: A Special Relativity Problem
- JuanC97
- · Replies 8 ·
Undergrad Inside Black Holes: Unraveling the Kerr Metric Structure
- Markus Hanke
- · Replies 14 ·
Undergrad Uniform acceleration and hyperbola
- mertcan
- · Replies 11 ·
Undergrad Could I travel to andromeda in my lifetime?
- tomasbede
- · Replies 10 ·
Undergrad Stupid question on index lowering and raising using metric
- smodak
- · Replies 17 ·
Graduate Einstein Hilbert action integral
- mertcan
- · Replies 32 ·
Undergrad What is an angle deficit in the curved space in GR?
- felicja
- · Replies 28 ·
High School How are matter and spacetime connected above the Planck scale?
- gva
- · Replies 2 ·
Undergrad Are There Black Holes in Galaxy Clusters?
- BadgerBadger92
- · Replies 5 ·
Undergrad LIGO light changes frequency not wavelength
- exponent137
- · Replies 105 ·
Undergrad Radio Comm Between 2 Points Diff Gravity: True?
- Hongo
- · Replies 3 ·
High School Nobel Prize in Physics for Relativity?
- Deepak K Kapur
- · Replies 6 ·
High School Energy Stored in Charged Capacitor: Kaluza-Klein Theory
- Spinnor
- · Replies 3 ·
Graduate Domain Wall Geometries: Continuous Coordinates, Discontinuous Metric
- Roy_1981
- · Replies 3 ·
Undergrad Why can't you use Simultaneity when doing Length Contraction
- Afterthought
- · Replies 13 ·
Graduate Lorentz Fitzgerald contraction
- Ritika
- · Replies 8 ·
Undergrad Need for GR: Historical Indications
- greypilgrim
- · Replies 12 ·
Undergrad Exterior Schwarzschild Solution & Gravitational Time Dilation
- space-time
- · Replies 10 ·
High School Observeving Black Hole and Time Dilation Question
- Seiten Maoh
- · Replies 15 ·
Undergrad Newtonian 4-Momentum Norm Analogue
- greypilgrim
- · Replies 5 ·
Undergrad Cox & Forshaw: Explaining E=mc^2's "Negative" Option
- EveningLight
- · Replies 4 ·
Graduate Physical reasons for having a metric-compatible affine connection?
- nearlynothing
- · Replies 28 ·
High School Gravity's Impact on Box w, l, & h: Myths & Facts
- Einstein's Cat
- · Replies 7 ·
Undergrad Total Energy of Particle in Potential: SR Explanation
- greypilgrim
- · Replies 4 ·
Undergrad Did the Big Bang separate space and time
- willem govaerts
- · Replies 4 ·
Undergrad Vector Transformation Law and Vector Spaces: Is it Abuse?
- Rburto
- · Replies 1 ·
Undergrad Lines of simultaneity in Twin Paradox spacetime diagram
- soothsayer
- · Replies 8 ·
High School Photon in a Box: Is Light Affected by Volume?
- jonatron5
- · Replies 17 ·
Undergrad What Does the Ricci Tensor Reveal About Einstein's Field Equations?
- AleksanderPhy
- · Replies 4 ·
High School Planck's Length, Length Contraction?
- Einstein's Cat
- · Replies 12 ·
High School How Far Is It To The Center Of The Milky Way/Tootsie Pop?
- Daleri Mc Rileda
- · Replies 13 ·
Undergrad Metric for Infinite Rod in Gen. Relativity
- t_r_theta_phi
- · Replies 1 ·
Undergrad Spatial geometry of constant Schwarzschild time hypersurface
- MeJennifer
- · Replies 20 ·
Undergrad Is Flamm's paraboloid a paraboloid?
- pchu
- · Replies 14 ·
High School Is Gravity Trapped Inside Black Holes?
- Umair Shariff
- · Replies 13 ·
Graduate Solving Exact Gravitational Plane Wave Confusion
- pervect
- · Replies 6 ·
Undergrad Action in Relativity: Non-Relativistic vs Relativistic Particles
- Meddusa
- · Replies 8 ·
Undergrad Deriving EM Energy Conservation from Lagrangian
- progato
- · Replies 2 ·
Undergrad Relationship between quadratic and square-root lagrangians
- stevendaryl
- · Replies 9 ·
Undergrad Time dilation time travel for novel - I need a calculation
- writer
- · Replies 16 ·