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 What is the nature of the force causing deviation from a circular orbit in GR?
- Buzz Bloom
- · Replies 29 ·
High School Light Beams Attraction: e=mc^2 & Asymmetry
- c704710
- · Replies 5 ·
Graduate Conserving Quantity in Schwarzschild Metric
- binbagsss
- · Replies 3 ·
Undergrad Uniting Quantum Mechanics & General Relativity: 3 Forces & Geometry
- jines
- · Replies 2 ·
Undergrad Meaning of Constants of Motion in General Relativity
- Vrbic
- · Replies 4 ·
Undergrad Getting to Grips with Rank-2 Tensors
- Silviu
- · Replies 3 ·
High School Temperature & Relativity: Can Plasma Fusion Test Limits?
- jk22
- · Replies 3 ·
High School Event in SR: Explained w/ Example for Better Understanding
- Pushoam
- · Replies 8 ·
High School Special relativity; mixed up time and space due to motion
- Hiero
- · Replies 12 ·
High School Some questions about light and relativity
- thetexan
- · Replies 29 ·
High School Relativity’s Effect on Consciousness
- silas mckee
- · Replies 11 ·
High School Gravity: Force or Distortion of Spacetime?
- Lunct
- · Replies 71 ·
Undergrad Is Time Reversal Symmetry Truly Fundamental?
- Alfredo Tifi
- · Replies 6 ·
Undergrad Deriving Schwarzschild Solution: Easier Strategies?
- davidge
- · Replies 23 ·
High School Rindler - uniform acceleration
- Lapidus
- · Replies 3 ·
Undergrad Rod Near Event Horizon: What Would Happen?
- Cato
- · Replies 2 ·
High School Black Hole Gravitational Lens: Bending Light & Mass
- Ashraf Siddiqui
- · Replies 2 ·
Undergrad Assumption that the rest mass energy is mc^2
- snate
- · Replies 8 ·
Graduate ##2+1##-D Einstein gravity is topological and only non-trivial locally
- Afonso Campos
- · Replies 2 ·
Undergrad Derivation of length contraction
- Pushoam
- · Replies 7 ·
High School C as Energy Conversion Constant: Conservation Law Explained
- xcom2112
- · Replies 3 ·
Graduate Cosmological constant in the semiclassical limit of quantum gravity
- Afonso Campos
- · Replies 8 ·
High School Einstein's Epiphany of Constant Light Speed
- thetexan
- · Replies 4 ·
Undergrad Metric Tensor as Simplest Math Object for Describing Space
- NaiveBayesian
- · Replies 6 ·
High School Is General Relativity Incomplete Without Dark Matter and Dark Energy?
- mustang19
- · Replies 8 ·
Undergrad Gravitation vs Curvilinear Coordinates: Analysis of Weinberg's Book
- davidge
- · Replies 7 ·
Undergrad What is the hyper-cylindrical line element?
- Caroline
- · Replies 2 ·
High School Negative potential energy and negative mass
- Vicara
- · Replies 71 ·
Undergrad Time Dilation, Clocks, & Gravity
- Pushoam
- · Replies 3 ·
Graduate Boundary conditions on the Euclidean Schwarzschild black hole
- Afonso Campos
- · Replies 3 ·
Graduate How to obtain components of the metric tensor?
- Matter_Matters
- · Replies 7 ·
Undergrad Calibration of Minkowski Diagram: Explaining Invariance of S^2
- Pushoam
- · Replies 1 ·
Undergrad Time as a Dimension: Exploring Galilean and Lorentz Transformation
- Pushoam
- · Replies 5 ·
Undergrad Lorentz transformation validity
- Pushoam
- · Replies 10 ·
High School In a cyclotron, the time to make it all the way around is Different
- physics user1
- · Replies 4 ·
Graduate Brain Overload: Comparing Proper Time, Ephemeris Time & Coordinate Time
- Matter_Matters
- · Replies 11 ·
High School Understanding Black Hole Equations Conceptually
- Ryan Jackson
- · Replies 5 ·
High School How Can You Create a Physics-Based Video Game to Teach Relativity?
- gradev
- · Replies 26 ·
Undergrad Time Dilation: One Year in Jupiter = How Many Years on Earth?
- ahmed emad
- · Replies 6 ·
Graduate Evaluate Covariant Derivative on Tensors
- Jonsson
- · Replies 7 ·
High School Can Photons be in a Stable Orbit? GR Analysis
- Grinkle
- · Replies 1 ·
Undergrad How do the Lorenz equations for time account for the movement of Alpha Centauri?
- arydberg
- · Replies 11 ·
Undergrad Variation of perfect fluid and Lie derivative
- TAKEDA Hiroki
- · Replies 4 ·
Undergrad Static, Isotropic Metric: Dependence on x & dx
- davidge
- · Replies 2 ·
High School Gravitational Waves: Mass Interaction Questions Answered
- NotASmurf
- · Replies 3 ·
Undergrad Square of the difference of four-vectors
- Arny_Toynbee
- · Replies 22 ·
Undergrad Rest Energy in special relativity
- Bhope69199
- · Replies 14 ·
High School Black Hole Tensile Strength: What Happens at Planck's Length?
- hexexpert
- · Replies 7 ·
Graduate EoM in Schwarzschild geometry: geodesic v Hamilton formalism
- Matter_Matters
- · Replies 31 ·
Undergrad How is Simultaneity Defined in Spacetime Diagrams by A.P. French?
- Pushoam
- · Replies 8 ·
High School Shape of Universe & Cosmological Principle
- ConfusedMonkey
- · Replies 2 ·
Undergrad Area of the event horizon of a rotating black hole
- Afonso Campos
- · Replies 1 ·
Undergrad Event and Cauchy horizons for a charged black hole
- Afonso Campos
- · Replies 5 ·
Undergrad Is the Principle of Relativity different for different theories?
- Pushoam
- · Replies 3 ·
Undergrad Can Born Rigid Motions Occur in Curved Spacetime?
- Tahmeed
- · Replies 8 ·
Graduate Two questions on the Stress-Energy Tensor
- zenmaster99
- · Replies 1 ·
Graduate Understanding the Relativistic Action for a Point Particle
- Higgsono
- · Replies 3 ·
High School Why is interstellar travel so hopelessly difficult?
- Ranvir
- · Replies 6 ·
Undergrad One way speed of light experiment proposal
- kkris1
- · Replies 46 ·
High School Conservation of Newtonian Force and the Invariance of Maxwell's Equations
- davidge
- · Replies 11 ·
Undergrad Dimensionless coupling constant of gravity
- gerald V
- · Replies 5 ·
Undergrad Electromagnetism and relativity
- bachir1994
- · Replies 2 ·
High School Muon Time Dilation: Earth vs Muon Perspective
- Allison
- · Replies 3 ·
Undergrad On the Relativistic Twisting of a rotating cylinder (Max von Laue)
- AVentura
- · Replies 192 ·
Graduate GR index gymnastics -- Have I misunderstood something or typo?
- Jonsson
- · Replies 12 ·
Undergrad Can a cosmologist cross an event horizon?
- Tom Mcfarland
- · Replies 24 ·
Undergrad LIGO Discovery - A question about space-time properties
- Milan Vojnovic
- · Replies 31 ·
Undergrad Relativism & Reality: Finding Length in Space
- ewq
- · Replies 10 ·
High School Why is every event in spacetime limited to our present point
- quantumfunction
- · Replies 34 ·
High School Escape Velocity from Relativistic Sphere: Derivation & Intuition
- Dilema
- · Replies 2 ·
High School Question: What Makes Light Move & Why Does It Travel at 299792458 mps?
- ahmed emad
- · Replies 2 ·
Undergrad Space-Time: A New Vision of the Universe
- GabrielCoriiu
- · Replies 1 ·
Graduate Multipole expansion of linearized field equations
- Stefaan Melis
- · Replies 9 ·
High School Can there be many Worldlines in 4D spacetime?
- quantumfunction
- · Replies 10 ·
High School Simultaneity in Special Relativity: Examining the Theory
- MartinWyckmans
- · Replies 3 ·
High School Why Do Bodies in Free Fall Change Position?
- Charly
- · Replies 9 ·
Undergrad How Does the Michelson-Morley Experiment Challenge Classical Physics?
- Pushoam
- · Replies 3 ·
Undergrad Can an Altered Thought Experiment Reconcile the Special Relativity Conundrum?
- hatflyer
- · Replies 82 ·
Undergrad Why does relativity not affect the speed of light?
- parshyaa
- · Replies 32 ·
Graduate Why isn't cosmological constant a mass of the graviton?
- Demystifier
- · Replies 21 ·
Undergrad Are Evanescent Gravitational Waves Measurable
- Paul Colby
- · Replies 20 ·
High School Does red-shifted light cause expansion of space?
- Addez123
- · Replies 29 ·
Undergrad Searching Ether Frame: Introduction to Special Relativity
- Pushoam
- · Replies 6 ·
High School Difference betwen space-like and time-like singularities
- Afonso Campos
- · Replies 4 ·
High School Gravitational Force and the Endless Supply of Massless Particles
- Chris Miller
- · Replies 8 ·
Graduate Simple 1D kinematic exercises with metric tensor
- DaTario
- · Replies 10 ·
Graduate Schwarzschild coordinates beyond the event horizon
- Afonso Campos
- · Replies 2 ·
High School Dark Energy & Expansion of Spacetime
- member 563992
- · Replies 1 ·
Graduate Radial, exterior, outgoing, null geodesics in Schwarzschild
- SonnetsAndMath
- · Replies 11 ·
Undergrad Simultaneity Paradox in Space: What's Going On?
- Arkalius
- · Replies 8 ·
Undergrad Is the Christoffel symbol orthogonal to the four-velocity?
- Sonderval
- · Replies 15 ·
Graduate Perihelion Precession in GR with Robertson Expansion
- Sonderval
- · Replies 4 ·
High School Do gravity and acceleration alter the speed of light?
- Ivan Bevanda E
- · Replies 21 ·
Undergrad Relativity and Eternalism: Proving the Possibility of 'Seeing the Future
- i_hate_math
- · Replies 8 ·
High School Question about energy-mass relationship
- parshyaa
- · Replies 2 ·
Graduate Bell's spaceship paradox: after the thread breaks....
- Philip Wood
- · Replies 18 ·
High School Is it possible to reach the singularity?
- ExecNight
- · Replies 20 ·
Undergrad Thought experiment- Dropping a rope into a Black hole
- YZEDY1one
- · Replies 17 ·
Undergrad Relative Motion vs Time: Paradox Explained
- EspressoDan
- · Replies 4 ·
Undergrad The name of the 3+1 metric where time is normal to space?
- gnnmartin
- · Replies 5 ·