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
Insights The Schwarzschild Geometry: Part 2 - Comments
- PeterDonis
- · Replies 2 ·
High School Could gravity be used to send light speed signals?
- farolero
- · Replies 30 ·
Undergrad Deriving the FLRW Metric: 4D Euclidean Space Needed?
- kent davidge
- · Replies 11 ·
High School Can we take a shrinking frame of reference?
- farolero
- · Replies 21 ·
Graduate Non static and isotropic solution for Einstein Field Eq
- Leonardo Machado
- · Replies 11 ·
Undergrad Mercury Precession and the Hypothetical Oblate Sun Model
- universityteacher
- · Replies 12 ·
High School Solving Ambiguity in QFT in Curved Spacetime
- fxdung
- · Replies 6 ·
High School Is a Rocket at Light Speed Truly Infinite Mass?
- farolero
- · Replies 3 ·
Undergrad Coordinate vs. Non-Coordinate Basis in General Relativity
- kent davidge
- · Replies 14 ·
High School Confused about how long it takes to cross an event horizon
- BenAS
- · Replies 21 ·
Undergrad Unifying gravity and quantum mechanics
- kent davidge
- · Replies 15 ·
Undergrad Is the Contraction of a Mixed Tensor Always Symmetric?
- arpon
- · Replies 4 ·
High School Speed of Light at near C speeds
- Lavar
- · Replies 14 ·
High School E = mc^2, Wikipedia Mass–energy equivalence Clarification
- Albertgauss
- · Replies 18 ·
Undergrad What happens when two light beams approach each other.
- albertrichardf
- · Replies 6 ·
Graduate Relativity in Complex Analysis: Is There a Formulation?
- vinven7
- · Replies 2 ·
High School Solving Field Equations & Schwarszchild Metric
- vinven7
- · Replies 1 ·
Undergrad Velocity 4-Vector for Light Ray
- MikeLizzi
- · Replies 1 ·
Undergrad Understand Shape of Universe: Spatially Flat?
- kent davidge
- · Replies 4 ·
Undergrad The Curious Case of White Holes: Unraveling the Mysteries of Spacetime Curvature
- DaniV
- · Replies 3 ·
High School General relativity vs. Newtonian gravity
- calinvass
- · Replies 11 ·
High School Does Graphene Have Infinite Mass?
- Noduagga
- · Replies 1 ·
Undergrad Something I noticed about Doppler asymmetry
- JohnnyGui
- · Replies 18 ·
Undergrad Maxwell's Eqs. & Tensor Notation
- Incand
- · Replies 7 ·
High School Black Holes: Questions on Event Horizon Observer
- kent davidge
- · Replies 5 ·
High School Inside a Black Hole: Rest Frame & Singularity
- tionis
- · Replies 5 ·
Graduate Mastering General Relativity: Student Experiences
- kent davidge
- · Replies 2 ·
Undergrad Quantizing Fluid Mechanics & Gravity: A Debate
- Narasoma
- · Replies 3 ·
Graduate Nonvanishing Torsion: When Does It Occur?
- EnigmaticField
- · Replies 4 ·
High School Is this the reason why time slows down as speed increases?
- farolero
- · Replies 9 ·
High School Relativity: Curving of Space & Mass Inflation Explained
- farolero
- · Replies 18 ·
High School Lorentz transformation formulas for arbitrary distances
- Jeronimus
- · Replies 18 ·
Undergrad What is the mass of a black hole made of?
- kent davidge
- · Replies 44 ·
Undergrad General Relativity: Is There No Universal Frame or No Way to Tell?
- Afterthought
- · Replies 7 ·
High School Did I Just Create 2.5 Kilograms of Energy?
- Algr
- · Replies 15 ·
Undergrad Metric Components: Inner Product of Vector U & V
- kent davidge
- · Replies 15 ·
Undergrad Speed of Light from Car Headlights & Brake Lights
- Tony Sims
- · Replies 2 ·
Undergrad Time: Questions for Curious Minds
- Vibin Narayanan
- · Replies 3 ·
Undergrad Understanding Wormhole Solutions to the Einstein Field Equations
- 1v1Dota2RightMeow
- · Replies 13 ·
Undergrad Rotating Black Holes: Q&A with First-Time Poster
- Farang
- · Replies 3 ·
High School Is Flatness a Relative Term in the Universe?
- newjerseyrunner
- · Replies 14 ·
Undergrad Does Planck Time Imply an Acceleration Limit?
- Battlemage!
- · Replies 2 ·
Undergrad What Are the Intriguing Questions Surrounding Time Dilation?
- bookofproofs
- · Replies 21 ·
High School Can velocity be determined in flat space?
- Chris Miller
- · Replies 43 ·
High School Spotting a Black Hole in the Microwave Background
- tionis
- · Replies 12 ·
Undergrad Stretching a rubber band increase its mass but how?
- Patrick Pihl
- · Replies 12 ·
High School Visualizing 3D Contours of Spacetime
- Easton Morrill
- · Replies 2 ·
Undergrad Help with Newtonian Gravity as Limit of General Relativity
- needved
- · Replies 1 ·
High School Special case of the twin paradox in special relativity
- Jeff B L
- · Replies 19 ·
Undergrad Magnetic Charges & Lorentz Invariance: Finding Papers
- nenyan
- · Replies 4 ·
Undergrad Help Understand Retarded Function: Einstein Eq. Linearized
- needved
- · Replies 1 ·
Undergrad Does global topology lead to a preferred frame in SR?
- maline
- · Replies 13 ·
Graduate Lack of uniqueness of the metric in GR
- RockyMarciano
- · Replies 21 ·
Undergrad Writing Components of a Metric Tensor
- kent davidge
- · Replies 6 ·
Undergrad Why do physicists show the magnetic field perpendicular to F
- physics user1
- · Replies 2 ·
Undergrad Rod falling through the event horizon of a black hole
- timmdeeg
- · Replies 27 ·
Undergrad Gravitational Waves & Energy: Is There a Consensus?
- epovo
- · Replies 9 ·
High School Do Twins Age Differently in Space?
- Chris Miller
- · Replies 75 ·
High School Schwarzschild Radius: Compression Inside Black Holes
- stoomart
- · Replies 10 ·
High School Space Bending: Questions Answered
- UfoPilot
- · Replies 3 ·
High School A light beam that never interacts with matter
- Hercuflea
- · Replies 11 ·
High School Is the Speed of Light Affected by Human Measurement Methods?
- Chris Miller
- · Replies 47 ·
Graduate The Mystery of the Minus Sign in Geometry, Topology, and Physics
- nenyan
- · Replies 2 ·
High School Why is E=mc² Defined with c Squared?
- STOKER
- · Replies 19 ·
Undergrad How can the Equivalence Principle hold when we consider tidal forces?
- Bernard
- · Replies 9 ·
High School Is Time Just a Perception or a Fundamental Aspect of Spacetime?
- Azaravicius
- · Replies 43 ·
Undergrad Complex Isomorphism Error in Lorentz Transform
- jk22
- · Replies 11 ·
High School Resistance of Space-Time fabric
- Ashiquee
- · Replies 7 ·
Graduate Isotropic metric and circumference of sphere
- Jonathan Scott
- · Replies 9 ·
Undergrad Understanding Electromagnetism & General Relativity
- Anypodetos
- · Replies 10 ·
Undergrad Generalized Tetrad Formalism for Rotating Spacetimes and the Equatorial Plane
- Vrbic
- · Replies 11 ·
High School Acceleration of Particles: Black Holes & Speed of Light
- Allen_Wolf
- · Replies 11 ·
Undergrad Why Are Equally Spaced Events Preserved in Transformation?
- TonyEsposito
- · Replies 6 ·
Undergrad Help with Anti-Relativity activist
- MikeLizzi
- · Replies 30 ·
Undergrad Michelson Morley Experiment Light Source
- Shehreyar Khan
- · Replies 3 ·
Undergrad Why does time have to be a complex (Minkowski metric)?
- feryopo
- · Replies 4 ·
Undergrad Interaction Term in EM Lagrangian - Explained
- Anypodetos
- · Replies 2 ·
Undergrad Solve Electromagnetic Field Acting on Charged Particle
- Mihai_B
- · Replies 3 ·
High School Learn Relativity Theory: Math Education Needed?
- modeler
- · Replies 2 ·
Graduate Relativity: Is "c" Speed in Vacuum Only?
- Jimber-Jaw
- · Replies 8 ·
Undergrad Stretched spring and change in mass
- Mohammed Shoaib
- · Replies 13 ·
High School Do black holes have a world line?
- tionis
- · Replies 10 ·
Undergrad Compute Relativistic Velocities of Photons & Neutrinos
- petrushkagoogol
- · Replies 6 ·
High School A universal compass/speedometer
- Chris Miller
- · Replies 20 ·
High School A question of why time dilates and what is described by it
- DerringDerpy
- · Replies 32 ·
Graduate Connection, Metric and Torsion
- pervect
- · Replies 3 ·
Undergrad GR as a Graded Time Dilation Field in Euclidean Space?
- rjbeery
- · Replies 42 ·
High School Calculate Speed of Relativistic Rocket by Observation
- Azaravicius
- · Replies 5 ·
High School Are objects moving relative to each other?
- Azaravicius
- · Replies 4 ·
Undergrad Differential Forms in General Relativity: Definition & Use
- kent davidge
- · Replies 3 ·
High School Measurements within our solar system with relativity in mind
- hsdrop
- · Replies 15 ·
Graduate Physical interpretation of Pauli-Lubanski pseudo-vector
- spaghetti3451
- · Replies 1 ·
High School Can we travel faster than the speed of light?
- Stephanus
- · Replies 26 ·
Graduate Transfer Momentum Along Axis by Torque: Special Relativity Analysis
- Jonathan Scott
- · Replies 9 ·
High School The moon and light that bends around it
- hsdrop
- · Replies 4 ·
Graduate Penrose Process & Hawking Area Theorem Explained
- Sumarna
- · Replies 6 ·
Undergrad Index Notation, Covector Transform Matrix Rep
- binbagsss
- · Replies 6 ·
High School Measuring Rest Length While Moving
- phyti
- · Replies 2 ·
Undergrad GR: How Much Mechanics is Involved?
- vector
- · Replies 6 ·
Insights General Relativity as a Gauge Theory - Comments
- haushofer
- · Replies 23 ·