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 Makes Light Cone Physics So Intriguing?
- harshithelp
- · Replies 1 ·
High School What is galileian system of coordinate?
- DavidCcc
- · Replies 3 ·
Graduate Is poincare group simply connected?
- andrea.dapor
- · Replies 4 ·
Graduate Is law of universal gravitation really correct?
- DarkestNight
- · Replies 3 ·
Graduate Why is energy the time counterpart of momentum
- lolgarithms
- · Replies 4 ·
Graduate SR and GR in a medium, gravitational waves
- haushofer
- · Replies 5 ·
Graduate General Lorenz transformation is not group
- archipatelin
- · Replies 17 ·
Graduate Independent Components in Riemann-Christoffel Tensor
- Starproj
- · Replies 3 ·
Graduate Spacetime, curvature, orbit, matter and reactions
- Elliot.exe
- · Replies 2 ·
Graduate Spacetime - formal description of No Rip/Tear
- Julian M
- · Replies 4 ·
Graduate Time Dilation-Frames-Details and hypotheticals
- JackAtl
- · Replies 5 ·
Undergrad Solution to Time Dilation Problem
- atarr3
- · Replies 4 ·
Graduate Minkowski metric tensor computation
- Advent
- · Replies 6 ·
Graduate Why does light have a constant speed in vacuum?
- Taturana
- · Replies 4 ·
Graduate Physical meaning of tensor fields
- espen180
- · Replies 4 ·
Graduate Does Schwarzschild Solution work inside a massive body?
- nickyrtr
- · Replies 4 ·
Graduate Local frame in special relativity vs cosmological frame in general relativity
- rasp
- · Replies 2 ·
Graduate When will the person at point B see train2 and why?
- dwspacetime
- · Replies 36 ·
Graduate GR weak field approx. problem with Dunsby's notes
- enomanus
- · Replies 3 ·
Graduate Why does the traveling twin age less if both see each other's clocks slow down?
- aguycalledwil
- · Replies 2 ·
Graduate Relativistic Particle Collisions with Photons: Understanding Momentum and Energy
- soupdejour
- · Replies 9 ·
Graduate Is the Speed of Light a Constant?
- cary cato
- · Replies 26 ·
Graduate Can fast-moving matter collapse into a black hole due to relativistic mass increase?
- Mentallic
- · Replies 14 ·
Graduate Relativistic paradox involving torsion.
- Cleonis
- · Replies 37 ·
Graduate Can an Observer Moving at Light Speed Measure Their Own Speed?
- hamsterman
- · Replies 6 ·
Graduate Fractal dimension of CMBR? Cluster distribution?
- nomadreid
- · Replies 2 ·
Is time travel possible?
- harshithelp
- · Replies 1 ·
Undergrad Why does relative motion cause redshift if light always travels at constant speed?
- Evolver
- · Replies 36 ·
Undergrad What proofs of relativity can be understood without advanced physics?
- jamesb-uk
- · Replies 13 ·
What will clock 3 count when light reaches it?
- ghost11
- · Replies 4 ·
Graduate Why does force on moving charges differ from gamma-factor analysis?
- Xezlec
- · Replies 13 ·
Graduate Understanding Time Dilation Equations: Special vs. General Relativity
- Zman
- · Replies 3 ·
Graduate Einstein's Theory: The Speed of Light and Time
- Zman
- · Replies 9 ·
Graduate Gravitational Force between Moving Bodies
- nickyrtr
- · Replies 4 ·
Graduate Special relativity and acceleration
- Zman
- · Replies 64 ·
Graduate Thinking bout the Special Theory of Relativity
- darkSun
- · Replies 4 ·
Graduate Researching an Alternative Theory to General Relativity
- wofsy
- · Replies 2 ·
Graduate Four-vectors and related concepts
- Dale
- · Replies 50 ·
Graduate Light Clock in a Gravity well ?
- Austin0
- · Replies 6 ·
Undergrad Constance of speed of light and refraction index question
- Taturana
- · Replies 4 ·
Graduate Does time expand along with space in relativity?
- earamsey
- · Replies 3 ·
Graduate Does space expansion differ from Lorentz contraction in cosmology?
- rasp
- · Replies 10 ·
Graduate Integrating by parts in f(R) gravity field equations derivation
- ramparts
- · Replies 10 ·
Undergrad Light clock moving toward observer paradox
- flatearther
- · Replies 20 ·
Graduate Velocity translating into weight?
- BuddyPal
- · Replies 3 ·
Graduate Is absolute zero energy a meaningful concept in relativistic thermodynamics?
- Zman
- · Replies 7 ·
Graduate Length contraction falling down a hole.
- tickle_monste
- · Replies 4 ·
Undergrad Gravitational Attraction of Motionless Masses
- killshot
- · Replies 33 ·
Undergrad How do you set up and interpret space-time diagrams?
- w3390
- · Replies 8 ·
Graduate Running away from a beam of light
- dog6880
- · Replies 3 ·
Graduate The Greisen-Zatsepin-Kuzmin limit.
- inhahe
- · Replies 3 ·
Graduate Can Relativity be Applied to the Motion of Atoms and Intermolecular Forces?
- avocadogirl
- · Replies 3 ·
Graduate Minkowski in 5-D: what is the fifth?
- nomadreid
- · Replies 4 ·
Undergrad I finally figured out how to ask my question
- PaulRacer
- · Replies 39 ·
Graduate Minkowski vs deSitter: hyperbolic vs spherical?
- nomadreid
- · Replies 3 ·
Undergrad Who is in Motion: Two People, Constant Rate
- grounded
- · Replies 5 ·
Graduate Apparent Angular Size in Pinhole Camera Concept
- Austin0
- · Replies 2 ·
High School Why AND HOW could Time Slow DOWN?
- ConfusedRiou
- · Replies 11 ·
Graduate What does the travelling twin actually see?
- I_am_learning
- · Replies 8 ·
Graduate Time dilation in uniform field?
- dianaj
- · Replies 6 ·
Graduate Do Time Machines Account for the Movement of Planets and Galaxies?
- Mr Whippy
- · Replies 1 ·
Graduate Do gravitomagnetic waves exist and what would their properties be?
- espen180
- · Replies 6 ·
Undergrad Why is light always speed c even if I'm moving at 0.8c alongside it?
- s1cko
- · Replies 6 ·
Graduate Are closed time like curves an inherent feature of rotating universe models?
- Galteeth
- · Replies 1 ·
Undergrad Does gravitational force travel at the speed of light or act instantaneously?
- PhDorBust
- · Replies 57 ·
Graduate Speed of Gravity? Questions about the Kopeikin Experiment of Sept 8 2002
- Pyro Ninja
- · Replies 24 ·
Graduate Looking for a specific unusual solution to Einstein's field equations
- Galteeth
- · Replies 3 ·
Graduate Negative time Minkowski metric
- tickle_monste
- · Replies 9 ·
Graduate Does complex general relativity help with naked singularities?
- Jim
- · Replies 3 ·
Graduate Is there any difference left between time and space left?
- I_am_learning
- · Replies 20 ·
Undergrad Red shift and the train thought experiment
- Pjpic
- · Replies 2 ·
Graduate What is happening when travelling towards light?
- RogiNicba
- · Replies 4 ·
Graduate Gravitational acceleration of relativistic objects.
- jwes44
- · Replies 4 ·
Graduate Is Vacuum Really Just Empty Spacetime?
- aaryan0077
- · Replies 13 ·
Graduate A thought Experiment on velocity greater than C
- I_am_learning
- · Replies 17 ·
Graduate Why Lowering Index on Components Affects Physical Variables
- enomanus
- · Replies 2 ·
Graduate Gravitational Potential Difference in Uniform Gravity Field
- vin300
- · Replies 61 ·
Graduate Modified Car and ditch paradox
- I_am_learning
- · Replies 3 ·
Undergrad Does every energy storage or production involve a mass change?
- I_am_learning
- · Replies 7 ·
Graduate How exactly to calculate the age difference in Twin paradox
- I_am_learning
- · Replies 13 ·
Graduate Black hole - contradiction to the Pauli exclusion principle?
- raul_l
- · Replies 9 ·
Graduate Does a photon experience time or is it affected only 'instantaneously'?
- That was mine
- · Replies 21 ·
Undergrad Objects at the Speed of Light question
- Shades
- · Replies 1 ·
Graduate Are Lorentz transforms unique?
- Naty1
- · Replies 13 ·
Graduate Falling down an infinitely deep well
- Somerschool
- · Replies 31 ·
Undergrad Why do observers in different frames see lightning strikes at different times?
- semc
- · Replies 3 ·
Challenge: superluminal average speed
- emcy
- · Replies 1 ·
Graduate The change spatial distance between 2 events
- kthouz
- · Replies 1 ·
Graduate Can a photon arrive before an observer traveling at the same speed?
- _PJ_
- · Replies 5 ·
Graduate Can aether theories be ruled out by one-way speed experiments?
- Saw
- · Replies 8 ·
Graduate Can Gravitons Escape a Black Hole's Gravitational Pull?
- NewImage
- · Replies 1 ·
Graduate Having velocity of light is like having infinite Velocity
- I_am_learning
- · Replies 10 ·
Graduate Is there a perfect correspondence between spacetime and reality?
- Force1
- · Replies 13 ·
Graduate What math skills are needed to compute Schwarzschild curvature components?
- 23571113
- · Replies 14 ·
Graduate Why does light follow the path A'B'Γ' in the moving frame?
- gian
- · Replies 5 ·
Graduate How can time dilation send you forward and backward simultaneously?
- Newtonians
- · Replies 1 ·
Undergrad Just when I started to get things straught in my head.
- bm0p700f
- · Replies 1 ·
Undergrad What does d²x and d²t mean in proper acceleration equations?
- Austin0
- · Replies 2 ·
Graduate Suppose relative v in S <> -v in S'
- jason12345
- · Replies 2 ·
Graduate Better understanding of causality
- mmoroz
- · Replies 13 ·