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 Parallel transport vs Fermi Transport
- davidge
- · Replies 5 ·
Undergrad Calculating Perturbative Expansion of Metric Inverse in Cosmology
- Frank Castle
- · Replies 1 ·
Undergrad Does ##x_\mu x^\mu## Equal ##(x_\mu)^2## in Einstein Notation?
- Silviu
- · Replies 4 ·
High School Time is neither matter nor energy then why it is influenced by Gravity?
- STAR GIRL
- · Replies 7 ·
High School Special relativity implies the space cannot be "closed"?
- Hiero
- · Replies 50 ·
Undergrad Why use Schwarzschild metric for light deflection and planetary precession
- davidge
- · Replies 4 ·
High School How to travel back in time according to General Relativity?
- TheQuestionGuy14
- · Replies 24 ·
High School Does Consciousness Create Time in a Timeless Space?
- BL4CKB0X97
- · Replies 45 ·
Graduate Why Orbital Time is 6πGM in Schwarzschild Geometry
- Jonsson
- · Replies 4 ·
High School Velocity-Composition Law w/ c=1: Deriving the Formula
- SiennaTheGr8
- · Replies 1 ·
Undergrad Metric transformation under coordinate transformation
- Tursinbay
- · Replies 9 ·
Undergrad What is the nature of the force causing deviation from a circular orbit in GR?
- Buzz Bloom
- · Replies 29 ·
High School Do light beams of different frequencies attract asymmetrically?
- c704710
- · Replies 5 ·
Graduate Conserving Quantity in Schwarzschild Metric
- binbagsss
- · Replies 3 ·
Undergrad Can three quantum forces and spacetime geometry be unified?
- 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 Can plasma fusion temperatures test relativity's speed limit?
- jk22
- · Replies 3 ·
High School Why is the event concept necessary in special relativity?
- 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 Is gravity a force or spacetime distortion?
- Lunct
- · Replies 71 ·
Undergrad Is Time Reversal Symmetry Truly Fundamental?
- Alfredo Tifi
- · Replies 6 ·
Undergrad Deriving the Schwarzschild solution without computing all Christoffel symbols
- davidge
- · Replies 23 ·
High School Rindler - uniform acceleration
- Lapidus
- · Replies 3 ·
Undergrad Rod Near Event Horizon: What Would Happen?
- Cato
- · Replies 2 ·
High School Does a black hole bend light differently than other masses?
- 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 Is c the conversion ratio between energy and matter in E=mc²?
- 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 Why does time dilation depend on the speed of information transfer?
- 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 How to determine velocity of a reference frame in Minkowski diagram calibration
- Pushoam
- · Replies 1 ·
Undergrad Why is time a dimension in Lorentz transformation but not in Galilean 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 Why use coordinate time instead of proper time in satellite equations of motion
- 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 Why is dx² rotationally invariant in a static isotropic metric?
- davidge
- · Replies 2 ·
High School Do gravitational waves lose intensity as they escape from mass?
- 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 Schwarzschild geodesics: geodesic vs Hamiltonian equations differ
- Matter_Matters
- · Replies 31 ·
Undergrad How is Simultaneity Defined in Spacetime Diagrams by A.P. French?
- Pushoam
- · Replies 8 ·
High School Does approximate homogeneity preserve the FRW metric's spatial geometry?
- 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 Why is the action for a point particle proportional to invariant length?
- 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 Einstein on magnetic fields as electric fields in different reference frames
- 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 Do gravitational waves stretch laser wavelengths in LIGO detectors?
- Milan Vojnovic
- · Replies 31 ·
Undergrad Are relativistic length contractions physically real or just observational effects?
- ewq
- · Replies 10 ·
High School Why is every event in spacetime limited to our present point
- quantumfunction
- · Replies 34 ·
High School Escape velocity from a sphere moving at relativistic speed
- Dilema
- · Replies 2 ·
High School Why does light travel at 299792458 m/s?
- 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 Why can't I use light travel time to determine simultaneity in special relativity?
- 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 1D kinematics exercises with non-Euclidean metric tensors
- DaTario
- · Replies 10 ·
Graduate Schwarzschild coordinates beyond the event horizon
- Afonso Campos
- · Replies 2 ·
High School Why is dark energy so much weaker than gravity in galaxies?
- member 563992
- · Replies 1 ·
Graduate Radial, exterior, outgoing, null geodesics in Schwarzschild
- SonnetsAndMath
- · Replies 11 ·