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 The spacetime length of finite spacelike intervals
- cianfa72
- · Replies 67 ·
High School Analogies for Gravitational Attraction in Physics
- geordief
- · Replies 2 ·
Undergrad Acceleration in special theory of relativity
- LagrangeEuler
- · Replies 6 ·
High School Black Hole Energy Conversion - How Does It Work?
- Peter Cole
- · Replies 9 ·
Undergrad Time and Lorentz transformations
- trees and plants
- · Replies 22 ·
High School Could Universe Expansion Be Causing a Decay in the Speed of Light?
- Matilda111
- · Replies 22 ·
Undergrad What is a "rotating worldline"?
- etotheipi
- · Replies 8 ·
High School Explaining Perihelion Shift of Mercury in GR Theory
- Herbascious J
- · Replies 13 ·
Undergrad How to work out the tetrads for given functions?
- etotheipi
- · Replies 9 ·
High School Why Aren’t ALL SR Effects Cumulative?
- MacWylie
- · Replies 28 ·
High School Time Dilation: Away or Toward Observer?
- Involute
- · Replies 3 ·
Graduate Differences between Actions in Curved Spacetime
- Haorong Wu
- · Replies 1 ·
Undergrad New paper gravitomagnetism explains dark matter effects
- kodama
- · Replies 4 ·
High School Clocks Vanishing into Thin Air - Gravitational Time Dilation
- Buckethead
- · Replies 27 ·
High School Understanding Spacetime Diagrams | Basics Explained
- Grasshopper
- · Replies 5 ·
Undergrad Electric Field seen by an observer in motion
- aliens123
- · Replies 59 ·
Undergrad Lorentz transformations: 1+1 spacetime only
- robwilson
- · Replies 93 ·
Undergrad Observing Christmas Lights in a Black Hole: What You See
- D.S.Beyer
- · Replies 13 ·
High School Is the Twins Paradox Equivalent to GPS Time Dilation?
- Buckethead
- · Replies 70 ·
High School Understanding Lorentz Transformations in Special Relativity
- Kaguro
- · Replies 24 ·
High School How does time dilation affect measurements of wheel rotation on a moving bus?
- etotheipi
- · Replies 8 ·
Insights The Electric Field Seen by an Observer: A Relativistic Calculation with Tensors
- robphy
- · Replies 1 ·
Undergrad Postulates of Special Relativity: Speed of Light in Inertial Frames
- Q1111
- · Replies 9 ·
Undergrad Diffeomorphism Invariance, Passive/Active Interpretations GR Insight
- haushofer
- · Replies 10 ·
Graduate Einstein's Elevator Trajectories: Desloge & Philpott 1987, Hamilton 1978
- Mathieu Rouaud
- · Replies 5 ·
High School Special Relativity & Einstein's Equivalence Principle
- jeremyfiennes
- · Replies 12 ·
Undergrad Thorne's error in explaining gravitational time dilation
- Guillermo Navas
- · Replies 1 ·
Undergrad Relativistic Energy & Robert M. Wald's General Relativity
- aliens123
- · Replies 15 ·
High School Event Horizon: Non-Overlapping Radii Explored
- Seppo Turunen
- · Replies 22 ·
Undergrad An algebraic manipulation in Schutz's book on GR
- MathematicalPhysicist
- · Replies 5 ·
Undergrad Principle of relativity: active vs passive point of view
- cianfa72
- · Replies 29 ·
High School Does special relativity entail matter annihilation?
- zoltrix
- · Replies 26 ·
Undergrad One more talk about the independence of Einstein's SR axioms
- dextercioby
- · Replies 71 ·
Undergrad Alcubierre Drive & Gravitational Waves: Alien Effects?
- Grasshopper
- · Replies 2 ·
Undergrad Pole-Barn Paradox: Is My Understanding Correct?
- Grasshopper
- · Replies 2 ·
Graduate Latest Warp Drive Research: Examining Chronology Protection Conjecture
- James Essig
- · Replies 6 ·
High School Black Hole Observation: Outside Observer & Spherical Symmetry
- ScruffyNerf
- · Replies 3 ·
Undergrad Einstein's 1935 Paper on Wormholes & Modern Physics
- dsaun777
- · Replies 2 ·
Undergrad Special Relativity: 3 Objects, Momentum & Time Dilation
- learning
- · Replies 4 ·
Undergrad What tests can falsify general relativity?
- francis20520
- · Replies 118 ·
Undergrad Why binary systems for gravitational waves?
- binbagsss
- · Replies 15 ·
Undergrad Is Scale Factor a Scalar? Sean Carroll Invitation
- George Keeling
- · Replies 12 ·
Undergrad Can the Spacetime Interval at a Singularity Change Our Understanding of Time?
- Grasshopper
- · Replies 9 ·
Undergrad Correcting General Relativity Effect on Atomic Time
- phoenix-anna
- · Replies 12 ·
High School Velocity Addn Paradox: SR Postulate Explained
- jeremyfiennes
- · Replies 11 ·
High School What Happens When Light Approaches a Black Hole?
- complete_noob
- · Replies 2 ·
Graduate Why Is Time Dilation Considered a Real Phenomenon?
- mariusmyburg
- · Replies 61 ·
Undergrad Is Heart Rate Invariant in Different States of Motion?
- aclaret
- · Replies 4 ·
Undergrad Space - time and the illusion of time
- thegroundhog
- · Replies 14 ·
Undergrad Cross Product in E_u: Explaining Gourgoulhon's Text
- aclaret
- · Replies 4 ·
Graduate GBAR Experiment (CERN) - Genève
- Marilyn67
- · Replies 31 ·
High School Understanding the Stress-Energy Tensor & Solar Mass in General Relativity
- empdee4
- · Replies 14 ·
Undergrad Doppler effect - can't imagine how the frequency of light can change
- musicgold
- · Replies 9 ·
High School Is this explanation of gravity under General Relativity legit?
- Involute
- · Replies 23 ·
Undergrad General Relativity: Angular Momentum, Gravity & Questions
- manolo-mm
- · Replies 7 ·
High School Light Speed Invariance: Experiments, Difficulties & Clarification
- georgechen
- · Replies 33 ·
Graduate Possible to publish a paper that contradicts Einstein's special relativity?
- georgechen
- · Replies 82 ·
High School Speed of Light: Questions Answered
- king123
- · Replies 8 ·
Undergrad Speed of light not an invariant in GR
- Pyter
- · Replies 105 ·
Undergrad What do physicists mean by "local degrees of freedom"?
- willidietomorrow
- · Replies 11 ·
High School What Links High Velocities, Strong Gravitational Fields, and Time Dilation?
- Lutz-F
- · Replies 11 ·
High School Interested in Black Holes, Neutron Stars, and White Dwarf Stars
- Peter Cole
- · Replies 39 ·
Undergrad General relativity, Electromagnetism and Feynman Diagrams
- LCSphysicist
- · Replies 1 ·
Graduate Gravitomagnetism: Derivation, Theory & Insights - Bill
- bhobba
- · Replies 3 ·
Undergrad Does rotation in Gödel spacetime depend on the frame of reference?
- PeterDonis
- · Replies 31 ·
Graduate What Does a Zero Metric Mean in the Context of Pre-Big Bang Physics?
- Physics4Funn
- · Replies 8 ·
High School Do photons travel instantaneously?
- Stevexyz
- · Replies 41 ·
Undergrad Coincidence of FLWR & CBR Homogeneity: Earth @ 0.0013c?
- mitochan
- · Replies 4 ·
Undergrad Is acceleration absolute or relative - revisited
- Peter Leeves
- · Replies 185 ·
Graduate Obtain Normal Vector of Bubble Wall in Spacetime
- John Greger
- · Replies 2 ·
Undergrad Why was Schrodinger's equation for the relativistic wave unsuccessful?
- LeoKrusty
- · Replies 1 ·
Undergrad Does string theory falsify the theory of special relativity?
- Dennis Blewett
- · Replies 19 ·
Undergrad Crossing Event Horizon: Physics of Disintegration?
- arusse02
- · Replies 13 ·
High School Metric tensor for a uniformly accelerated observer
- Pyter
- · Replies 55 ·
Undergrad Speed of Light in Different Mediums: Exploring Maxwell Equations
- Cosmic Lollipop
- · Replies 7 ·
Undergrad Derivation of E=pc & E=MC2: Which Came First?
- imsmooth
- · Replies 67 ·
High School Is Gravity Really a Force? A Look at General Relativity's Perspective
- Jupiter60
- · Replies 44 ·
Undergrad Calculating Distance Light Travels Near a Black Hole
- Haorong Wu
- · Replies 12 ·
Undergrad Understanding Relativity: How Moving Objects Experience Near Light Speed Travel
- JerryF
- · Replies 83 ·
Undergrad Decompose SL(2C) Matrix: Real Parameters from Complex
- DrDu
- · Replies 5 ·
Undergrad Explore Coordinate Dependent Statements in Orodruin's Insight
- George Keeling
- · Replies 5 ·
Graduate Is There a Unified Theory Between General Relativity and Electromagnetism?
- Karimselim1997
- · Replies 4 ·
Undergrad Equations of Spacetime Invariant - Understanding the Difference
- Thevan
- · Replies 4 ·
Undergrad Gravitational Waves Emitted by a Binary System
- lomidrevo
- · Replies 24 ·
Undergrad Solving GR 2-Body Problem with Summ. of Christoffel Symbols
- D.S.Beyer
- · Replies 12 ·
Undergrad Would circumnavigating the Universe allow one way measurement of light's speed?
- Flatland
- · Replies 69 ·
High School Energy Conservation in Relativity: Perpetual Motion?
- faramund
- · Replies 11 ·
High School Redshifted Photon Emission vs Transport: Magnitude of Gravitational Redshift
- Mickey1
- · Replies 10 ·
Undergrad How Do Dual Vectors Differ From Regular Vectors in Physics?
- pixel
- · Replies 35 ·
Undergrad Klein-Gordon: Schwarzschild Metric, Physically Acceptable?
- Vitani1
- · Replies 7 ·
Undergrad Is the premise of the Michelson–Morley argument still valid?
- Killtech
- · Replies 31 ·
Undergrad Interpretation of Potential Energy as Field Property
- zonde
- · Replies 5 ·
Undergrad Compute EOM for Spin Connection from Einstein-Palatini Action
- Lactose
- · Replies 1 ·
Undergrad Calculating Time Dilation & Galaxy Rotation Curve
- sha1000
- · Replies 7 ·
Undergrad Solving the Flickering Light Paradox
- astrodummy
- · Replies 20 ·
Undergrad Compute Gradient in GR: Step-by-Step Guide
- John Greger
- · Replies 3 ·
Undergrad Source of Gravity of heavy mass as per GTR
- eaglechief
- · Replies 14 ·
High School What Happens When Light Meets Matter in the Universe?
- vcandy
- · Replies 17 ·
High School Is time a true variable in the scheme of things?
- Suppaman
- · Replies 73 ·
Undergrad Gravity on Earth: Basic Qs Answered by Physicists
- Brooksie
- · Replies 8 ·