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
Graduate What would reality be like without SR?
- teachmemore
- · Replies 18 ·
Graduate Gravity curvature and graviton
- Nikarus
- · Replies 18 ·
Graduate Do you know how to derive the General Theory of Relativity?
- FoxCommander
- · Replies 4 ·
Graduate How does light from the past ever reach me?
- closet mathemetician
- · Replies 7 ·
Graduate Massless Klein-Gordon equation not conformally invariant?
- bcrowell
- · Replies 6 ·
Graduate Why does the tensor product equal 1/n! times the wedge product in equation 2.96?
- LAHLH
- · Replies 3 ·
Graduate Can general relativity explain the difference in tides between land and sea?
- dodo
- · Replies 3 ·
Undergrad Time Travel Proposal: Observing Objects from the Past?
- NetMage
- · Replies 5 ·
Graduate What is the measurement of an angle in special relativity?
- sudhindra
- · Replies 1 ·
Graduate Does gravitational mass change during collapse?
- nickyrtr
- · Replies 16 ·
Graduate What is the Chern-Simons form in general relativity?
- jinbaw
- · Replies 1 ·
Graduate Is the Boltzmann Equation in GR Truly Coordinate Independent?
- DrFaustus
- · Replies 9 ·
Graduate What Is the Effect of Length Contraction on Time Dilation in Relativity?
- hprog
- · Replies 8 ·
Graduate How Does Light Behave in a Moving Light Clock?
- teachmemore
- · Replies 10 ·
Graduate Spacetime and limit c->infinity
- JustinLevy
- · Replies 23 ·
Graduate Understanding Einstein Field Equations Through Tensor Calculus
- JDoolin
- · Replies 57 ·
Graduate SR length contraction question
- ehasan
- · Replies 2 ·
Graduate General Relativity Effective Potentials
- Auburnman
- · Replies 5 ·
Graduate Conceptualizing travel toward a light source
- teachmemore
- · Replies 6 ·
Graduate Reference that explains general relativity
- jinbaw
- · Replies 6 ·
Graduate Einstein needs to show his work
- rhenretta
- · Replies 9 ·
Graduate Can proper time be calculated for varying velocity along a worldline?
- ehasan
- · Replies 8 ·
Graduate Acceleration of a circulatory particle
- ehasan
- · Replies 2 ·
Graduate Coordinate singularities and coordinate transformations
- jinbaw
- · Replies 7 ·
Graduate How Do You Model an Apple Falling into a Black Hole Using Integral Calculus?
- Rapidrain
- · Replies 10 ·
Graduate Third derivative of quadrupole moment as source of radiation
- bcrowell
- · Replies 4 ·
Graduate Issues with a proof of E=mc²
- Cheman
- · Replies 16 ·
Graduate Event horizon: light delay and grav. time dilation
- Searinox
- · Replies 4 ·
Graduate Question from Weinberg's cosmology text
- blueeyedblond
- · Replies 5 ·
Graduate The Theory of the Transverse Doppler Effect
- Irrational
- · Replies 3 ·
Graduate Lorentz factor for slow speeds
- cshum00
- · Replies 1 ·
Possible Proof of Time Travel: Is it Physically Possible?
- AfRoMaNn
- · Replies 3 ·
Graduate Relativity and the arrow of time
- josephwouk
- · Replies 25 ·
Undergrad Why did Einstein reject the ether if Lorentz's theory worked?
- hprog
- · Replies 28 ·
Graduate Why Do Some Theories Suggest Speeds Faster Than Light?
- kfx
- · Replies 10 ·
Graduate Shear stress in Energy-momentum Stress Tensor
- Q-reeus
- · Replies 16 ·
Undergrad Gravity /electromagnetism /measuring
- forcecarrier
- · Replies 3 ·
Graduate The Pioneer Anomaly and Vacuum Energy
- josephwouk
- · Replies 7 ·
Graduate What causes the warping of space-time?
- TheAlkemist
- · Replies 25 ·
High School Why faster than light is impossible?
- scope
- · Replies 13 ·
Graduate Lorentz invariance and General invariance
- mtak0114
- · Replies 1 ·
Graduate Do massive objects warp spacetime into spherical shapes?
- venton
- · Replies 10 ·
Graduate What is the different between Minkowski Space an Semi Riemann Space?
- ber70
- · Replies 1 ·
Graduate Dimensions and information content
- josephwouk
- · Replies 6 ·
Undergrad Can wormholes make you travel faster then c
- mat1101
- · Replies 5 ·
Undergrad Why Can't Anything Exceed the Speed of Light?
- jamesfirst
- · Replies 4 ·
Graduate Going crazy: can someone spot the error in this simple derivation?
- nonequilibrium
- · Replies 7 ·
Graduate How Do Conformal Maps Preserve Angles in Different Geometric Contexts?
- bcrowell
- · Replies 3 ·
Graduate Existence of quasi-euclidean spacelike hypersurfaces?
- PAllen
- · Replies 5 ·
Graduate Eddington Finkelstein coordinates in the Schwarzschild spacetime
- vitaniarain
- · Replies 4 ·
Graduate What are valid coordinate transforms (diffeomorphisms)?
- PAllen
- · Replies 3 ·
Graduate Velocity addition ain't what it used to be
- yre
- · Replies 33 ·
Graduate Can wormholes be used for faster-than-light travel?
- Pragz
- · Replies 1 ·
Graduate Events in different reference frames
- atay1508
- · Replies 2 ·
Graduate Covariant derivative and geometry of tensors
- avorobey
- · Replies 6 ·
High School Is It Possible to Chase Yourself Around the World?
- Godswitch
- · Replies 11 ·
Graduate An issue I'm having with time dilation and other effects of speed
- 1MileCrash
- · Replies 4 ·
Graduate Is the Ricci tensor symmetric in a torsion-free connection?
- member 11137
- · Replies 28 ·
High School Is Spacetime Everywhere and Does it Stack Infinitely?
- jdfire33
- · Replies 3 ·
Graduate Why does light travel time alone not explain observed time dilation?
- hprog
- · Replies 11 ·
Graduate Local Minkowski space and free falling
- karlzr
- · Replies 11 ·
Graduate Choice of scaling function for Penrose diagrams
- bcrowell
- · Replies 7 ·
Graduate Lorentz transformations of the angular momentum
- scope
- · Replies 15 ·
Graduate Can a rigid rod from Earth to the Sun be rotated faster than light?
- LucasGB
- · Replies 16 ·
Graduate Can anything truly travel at lightspeed through both space and time?
- 1MileCrash
- · Replies 15 ·
Graduate What is the Lorentz-invariant metric for space-time in special relativity?
- zlasner
- · Replies 8 ·
Graduate Expressing 4-potential as a Fourier integral
- dnquark
- · Replies 7 ·
Undergrad How do we know that gravity results from mass?
- mrspeedybob
- · Replies 8 ·
Graduate Upper- and lower-index Levi-Civita tensor/symbol
- bcrowell
- · Replies 3 ·
Graduate Triangle GR thought experiment
- kamenjar
- · Replies 22 ·
Graduate Why does a photon have spin if time doesn't pass in its frame?
- scope
- · Replies 12 ·
Graduate Papers and books on wormholes and white holes for GR students
- pythagoras88
- · Replies 3 ·
Graduate Definition of black hole for the purposes of no-hair theorems?
- bcrowell
- · Replies 3 ·
Graduate Schwarzschild metric in 3-dimensional space-time
- Zinger0
- · Replies 30 ·
Graduate Einstein was wrong you can beat the damn game
- maxmaxus
- · Replies 11 ·
Graduate Is General Relativity Time Symmetric?
- Phrak
- · Replies 56 ·
Graduate Do materials have temporal elasticity?
- mrspeedybob
- · Replies 1 ·
Undergrad Accel Qs: Is Velocity Affected by Gravitational Acceleration?
- Rlam90
- · Replies 8 ·
Graduate What are the meanings of highlighted term?
- Hyperspace2
- · Replies 4 ·
Graduate What Does the 1 in the Spacetime Equation Mean?
- nomadreid
- · Replies 4 ·
Graduate Does the equivalence principle apply to clock rates in uniform acceleration?
- JDoolin
- · Replies 110 ·
Graduate Can E=mc^2 Be Derived Without Special Relativity?
- journeytospace
- · Replies 10 ·
Graduate Trying to understand the Lorentz transformation.
- Hellabyte
- · Replies 4 ·
Graduate Is Sciama's theory of inertia based on Mach's principle sound?
- Charlie G
- · Replies 7 ·
Graduate Where laser beam will fall (see the attachment)
- jubair.pk
- · Replies 8 ·
Graduate Negative Schwarzschild mass parameter?
- mersecske
- · Replies 16 ·
Undergrad Gravity: What Powers Mass's Pull on Objects?
- harp AP 2010
- · Replies 6 ·
Graduate Finding Components of the Christoffel Symbol
- MidnightR
- · Replies 2 ·
Could we be inside a larger universe like in Men in Black?
- physicsmum
- · Replies 16 ·
Undergrad Can Centrifugal Force Overcome Gravity?
- Lucky Eddie
- · Replies 1 ·
Graduate Photons and and equivalent number of atoms on gravity
- ensabah6
- · Replies 1 ·
Graduate Let's say i'm in Einstein's elevator
- rocca123
- · Replies 10 ·
Undergrad Do you see a distant light source sooner when traveling toward it at relativistic speed?
- newbiephysics
- · Replies 49 ·
Graduate Why does a clock appear to run slower on a space probe moving away from Earth?
- Mu naught
- · Replies 7 ·
Undergrad Will the combined object move left or right after an A vs B collision?
- hprog
- · Replies 3 ·
Graduate Wormholes to lead into different parts of space
- Zeteg
- · Replies 1 ·
Graduate How Does a Spherical Earth Challenge Our Perception of Space and Geometry?
- Hyperspace2
- · Replies 11 ·
Graduate Orthochronous transformations?
- myleo727
- · Replies 2 ·
Undergrad Why do we treat earth and why does it work as an inertial frame
- 1MileCrash
- · Replies 6 ·
Graduate Can an outside observer use electromagnets to solve the Barn-Pole Paradox?
- Kruse
- · Replies 4 ·