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
High School "Forced Conclusion" in Train-Embankment Experiment
- Ian432
- · Replies 52 ·
High School Does light's lack of inertia explain why its speed is constant?
- dayalanand roy
- · Replies 6 ·
Undergrad Relativistic Kinetic Energy Derivation
- PCB
- · Replies 22 ·
Undergrad What is the source of curvature in an accelerating frame?
- Adel Makram
- · Replies 30 ·
Undergrad Do the Energy-Momentum Transformations apply to Photons?
- tade
- · Replies 32 ·
Undergrad Time Dilation in Hypothetical Faster-than-Light Travel
- JEJoll
- · Replies 6 ·
Undergrad Special theory of relativity argument
- exponent137
- · Replies 21 ·
High School Can entanglement changes at E1 and E3 both affect particle A at E2?
- Stephanus
- · Replies 2 ·
Undergrad Why does dividing by invariant proper time preserve Lorentz transformability?
- SiennaTheGr8
- · Replies 10 ·
High School Using Lorentz Transformations vs Time Dilation/Length Contraction
- Jonathan Densil
- · Replies 17 ·
Undergrad How Do Orbiting Black Holes Generate Gravitational Waves?
- jnorman
- · Replies 4 ·
Undergrad Relativistic Momentum: 880kg Spacecraft at 1/2 C
- rickross
- · Replies 2 ·
Undergrad Relativistic Mass Oscillation & Gravitational Field at R
- Devin
- · Replies 5 ·
Undergrad Relativity of Simultaneity: An Overview
- wildebeest44
- · Replies 3 ·
Undergrad Does the rocket twin's view of Earth's clock speed depend on distance in GR?
- idea2000
- · Replies 29 ·
High School Why is the position four-vector X=(ct, x, y, z) Lorentz-invariant?
- SiennaTheGr8
- · Replies 6 ·
Undergrad How Do Lorentz Transformations Affect Perceptions of Time and Distance?
- space-time
- · Replies 5 ·
Undergrad Earth as Inertial Ref. Frame: Test Relativity's Precision
- pixel
- · Replies 2 ·
High School DeBroglie Wavelength with Relativistic Electron
- Oaxaca
- · Replies 3 ·
Undergrad Lorentz Transformation: Writing in Different Forms
- befj0001
- · Replies 5 ·
High School Speed of light -- Why is it constant?
- Docscientist
- · Replies 7 ·
High School What happens to the final image of a person falling into a black hole?
- jBase
- · Replies 4 ·
High School Turning Einstein’s train thought experiment on its head
- vstbagdad
- · Replies 8 ·
High School Distinguishing inertial reference frames
- bwana
- · Replies 12 ·
Special Relativity Comic Strip: Today's Edition
- pixel
- · Replies 1 ·
Undergrad Project Greenglow: Is Anti-Gravity Possible?
- Ontophobe
- · Replies 3 ·
High School What is the gravitational effect an accelarated mass?
- Burtay Mutlu
- · Replies 2 ·
High School Would this thought experiment measure the speed of light correctly?
- Ian432
- · Replies 4 ·
Undergrad How does a photon view the universe?
- Al X
- · Replies 5 ·
Undergrad Experiment to test the basic assumption of SR
- ralfcis
- · Replies 32 ·
Undergrad Three assumptions underlying relativity theory
- ralfcis
- · Replies 17 ·
High School Where is the slowest point in terms of time?
- Josh_H
- · Replies 15 ·
Undergrad Why Does Time Dilation Occur in the Light Clock Thought Experiment on a Train?
- DAC
- · Replies 28 ·
High School Time Dilation: When Earth or Light Speed Travel?
- Anis SNOUSSI
- · Replies 2 ·
High School Can Force Change Mass w/ Constant Velocity?
- hackhard
- · Replies 9 ·
Graduate Time reversal of gravity and Richard Feynman lecture on past and future
- ande4jo
- · Replies 6 ·
Undergrad What Actually is Length Contraction?
- Sturk200
- · Replies 15 ·
Undergrad Not understanding Hulse Taylor period shift calculation
- Prometeus
- · Replies 6 ·
High School Name of experiment confirming mass-gravitational attraction?
- Matt Benesi
- · Replies 29 ·
High School Was gravity's spacetime deformation the last step of general relativity?
- KarminValso1724
- · Replies 4 ·
High School Gravitational Waves @ relativistic speed?
- tionis
- · Replies 53 ·
High School Speed of Light Lowered in Vacuum: Consequences for Relativity?
- PaulElu
- · Replies 2 ·
Undergrad Does four-momentum invariance imply vectorial momentum conservation?
- Anton Alice
- · Replies 13 ·
High School Deriving vacuum permittivity and permeability from quantum field theory
- Younghun park
- · Replies 7 ·
High School How would Ether simplify science?
- ASGARDIANBRONY
- · Replies 7 ·
Undergrad Non-relativistic limit of the Lagrangian
- befj0001
- · Replies 5 ·
High School How does time dilation affect travel time at different speeds?
- John Fluharty
- · Replies 17 ·
High School Can We Reach Speed of Light w/ Model?
- ztdep
- · Replies 3 ·
Undergrad Cartesian Coordinates Interpretation in GR?
- clinden
- · Replies 41 ·
Undergrad Is Gravity inertia, acceleration or curvature in GR?
- fog37
- · Replies 46 ·
High School A couple of questions on mass increase
- alba
- · Replies 33 ·
Undergrad When to use special vs general relativity?
- MoradLemans
- · Replies 15 ·
Graduate CED: Solving the Full-blown Classical Electromagnetism Problem
- dextercioby
- · Replies 1 ·
Graduate Israel junction conditions for simple metrics
- FunkyDwarf
- · Replies 4 ·
Undergrad Shuttle Orientation in Orbit: A GR Perspective
- MattRob
- · Replies 8 ·
Graduate Taylor expansion of the metric near a point in Riemannian geometry
- Cosmology2015
- · Replies 5 ·
Undergrad Plus sign in Einstein's 1905 Doppler formula for opposite light rays
- SiennaTheGr8
- · Replies 2 ·
High School Can FTL communication violate causality without one party moving?
- Stephanus
- · Replies 17 ·
Undergrad Equivalent statements of the weak energy condition
- hideelo
- · Replies 3 ·
Undergrad Why are dual basis vectors and reciprocal basis vectors the same thing?
- Vanille
- · Replies 14 ·
High School Gravity of the Earth decreases if it stops spinning?
- aiop
- · Replies 85 ·
High School Is special relativity incomplete?
- flexible_time
- · Replies 67 ·
Undergrad Asymmetric tensor definition and uses
- izzi wekwek
- · Replies 5 ·
High School Amount of energy to get a spaceship to 99% C
- Kaura
- · Replies 10 ·
Graduate How Does Arm Length Affect Doppler Shift Measurement?
- redkiss
- · Replies 8 ·
Undergrad Deriving the Lorentz formula from my own example
- JohnnyGui
- · Replies 57 ·
High School How do I define a second properly?
- BananaChris
- · Replies 5 ·
Undergrad Using the metric to raise and lower indices
- Kevin McHugh
- · Replies 14 ·
High School What is the amplitude of a gravitational wave at the source?
- mmusiak
- · Replies 9 ·
Undergrad Dimension Check of Einstein's Field Equations
- bentmol
- · Replies 1 ·
Undergrad Are there any alternative interpretations to GR?
- olgerm
- · Replies 48 ·
High School Gravity waves And entanglement quesro
- Justice Hunter
- · Replies 2 ·
High School Can the gun fire if observers disagree on simultaneity?
- Marrrtin
- · Replies 11 ·
Undergrad Does a moving massive object's gravitational field change in magnitude?
- kos
- · Replies 7 ·
High School What happens to a 12-km propeller's tips approaching relativistic speeds?
- xpell
- · Replies 40 ·
Undergrad Which permutations of bcd make Ra[bcd] vanish?
- Kevin McHugh
- · Replies 15 ·
Undergrad Independence of speed of light and velocity of source
- spacediver
- · Replies 34 ·
High School Can Time-Reversed Gravitational Waves Be Detected or Recovered?
- georgir
- · Replies 28 ·
Undergrad Do Event Horizons Really Exist?
- Tollendal
- · Replies 6 ·
High School How does spacetime warping explain gravity at Earth's poles and tides?
- Aman Trivedi
- · Replies 3 ·
High School General Relativity and Gravity?
- ProfuselyQuarky
- · Replies 13 ·
Undergrad Reducing Riemann tensor components from 64 to 21
- Kevin McHugh
- · Replies 6 ·
Undergrad Do gravitational waves experience gravitational pull like photons do?
- greswd
- · Replies 9 ·
Undergrad Is the Linear Ehrenfest Paradox Accurate for Circular Motion?
- JVNY
- · Replies 33 ·
Undergrad Calc Precession of Mercury Orbit: Stress-Energy Tensor=0?
- pixel
- · Replies 5 ·
High School Gaussian Curvature and Riemmanian Geometry
- ProfuselyQuarky
- · Replies 7 ·
Graduate Can Interstellar Travel Be Achieved Through Advanced Relativity Calculations?
- Fizica7
- · Replies 31 ·
High School Does LIGO's Detection of GW150914 Confirm General Relativity?
- yancey
- · Replies 2 ·
Undergrad Solving Tangent Plane Approximation in Einstein Gravity
- Lapidus
- · Replies 1 ·
Undergrad Why do all observers agree on the tensor itself but not its components?
- gianeshwar
- · Replies 3 ·
Undergrad Can you define isolated and closed systems in relativity?
- Twigg
- · Replies 2 ·
Undergrad What Causes Different States of Mass and Energy in E = mc²?
- arupel
- · Replies 23 ·
High School Cosmic Ray Muons: Finding Experimental Data for Special Relativity
- rnielsen25
- · Replies 2 ·
Undergrad LIGO and speed of propagation of gravity
- bcrowell
- · Replies 15 ·
Undergrad What Happens to Time in the Twin Paradox of Relativity?
- Alberto87
- · Replies 9 ·
High School Time dilation in strong gravitational fields: will the traveler age only 1 hour?
- Lim Y K
- · Replies 1 ·
Undergrad What is the resolution to the problem with E cross B field and E>B?
- jlr6042
- · Replies 5 ·
Undergrad Did Scott Kelly age less than his twin, or more?
- Karl Coryat
- · Replies 12 ·
Graduate Effect of Blue-Shifted GWs on Particles
- Gravitoastronomy
- · Replies 1 ·
Undergrad Energy of a Rotating Binary system
- greswd
- · Replies 21 ·