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 How fast is a relativistic velocity?
- whydoyouwanttoknow
- · Replies 6 ·
Graduate Speed of light and length contraction
- Brookey
- · Replies 4 ·
Graduate Definition of a clock in relativity theory
- kurious
- · Replies 3 ·
Graduate I'm holding a pole and running at a relativistic velocity
- whydoyouwanttoknow
- · Replies 2 ·
Graduate Light Around Black Holes: Can It Orbit?
- turin
- · Replies 2 ·
Graduate How is E=mc² derived and how difficult is it to understand?
- Goblin
- · Replies 13 ·
Graduate Did Einstein and Ziegler explore mass constituents moving at light speed in 1909?
- Vern
- · Replies 26 ·
Graduate NASA's Gravity Probe B: Testing Einstein's Theory of Relativity
- Orion1
- · Replies 5 ·
Will Hawking or Penrose ever win Nobel Prize?
- Nenad
- · Replies 3 ·
Undergrad Relativistic Doppler effect (for sound?)
- one_raven
- · Replies 3 ·
Undergrad How fast to experience 6 days while 15 billion years pass outside?
- woodysooner
- · Replies 17 ·
Undergrad What Is the Difference Between Dark Matter and Dark Energy?
- marlon
- · Replies 11 ·
Graduate Gravity, Gravitons, and Geodesics.
- Glenn
- · Replies 20 ·
Request for Opinion on DW's Excellent Website - Geocities.com/zcphysicsms
- pmb_phy
- · Replies 2 ·
Graduate Why do the Einstein Field Equations have multiple solutions?
- kurious
- · Replies 9 ·
Graduate What Happens to Light Speed When Measured from a Fast-Moving Space Station?
- zoobyshoe
- · Replies 119 ·
Graduate Weyl Curvature, Mach's Principle, and Heisenberg Uncertainty?
- PFanalog57
- · Replies 2 ·
Graduate Length contraction and field theory
- kurious
- · Replies 8 ·
Graduate Dought regarding equivalence principle
- einstein_vishnu
- · Replies 5 ·
Graduate Why does the galaxy inhabitant's clock show 100,000 years, not 100,000/49?
- µ³
- · Replies 11 ·
Undergrad Einstein's Constant: The Speed of Light Irrespective of Source
- HIGHLYTOXIC
- · Replies 4 ·
Graduate How many metrics exist in relativity and can they be transformed?
- kurious
- · Replies 3 ·
Graduate What are the implications of gravity and other dimensions in our universe?
- Alkatran
- · Replies 1 ·
Graduate Solution to GR Field Equations
- zeronem
- · Replies 2 ·
Graduate Why don't reciprocal time dilations cancel out?
- RAD4921
- · Replies 24 ·
Graduate What Happens to Gravity Fields When They Change?
- Phymath
- · Replies 9 ·
Graduate Uniformity of dark energy distribution
- kurious
- · Replies 2 ·
Undergrad Can Relativity Prove Existence?
- Imparcticle
- · Replies 14 ·
Undergrad Time Dilation: Is Distance a Factor?
- Moose352
- · Replies 2 ·
Undergrad Is Time Travel Possible When Objects Cannot Coexist in Different Time Periods?
- Themuffinman
- · Replies 6 ·
Graduate Why do relativistic particles need more energy to accelerate as they approach light speed?
- Dook
- · Replies 49 ·
Graduate Was Dayton Miller's ether-drift experiment real or flawed?
- PFanalog57
- · Replies 10 ·
Does Time have a beggining? an End?
- Themuffinman
- · Replies 5 ·
Undergrad Why can't objects travel faster than the speed of light?
- NanakiXIII
- · Replies 12 ·
Graduate How would charges without mass be positioned in space-time?
- Reflector
- · Replies 4 ·
Graduate If you back in time and shooting yourself, do you die?
- Edward Teller
- · Replies 4 ·
Graduate How Does Time Geometry Affect the Concept of Event Simultaneity in Relativity?
- Antonio Lao
- · Replies 7 ·
Graduate Time travel and Multiverse Theory
- chronus
- · Replies 42 ·
Graduate Can time travel into the past avoid paradoxes with worldlines?
- Whitestar
- · Replies 5 ·
Graduate Why Haven't Two Clocks on a Table Been Used to Measure Light's One-Way Speed?
- Martin Miller
- · Replies 268 ·
Graduate Can a rigid rod transmit force faster than light?
- Nenad
- · Replies 6 ·
Undergrad How Does Gravity Shape Space-Time Beyond Simple Indentations?
- C3l7
- · Replies 9 ·
Graduate Why is then Time Travel possible?
- HIGHLYTOXIC
- · Replies 31 ·
Undergrad Could 2D Time Revolutionize Tic-Tac-Toe Gameplay?
- Alkatran
- · Replies 2 ·
Is Time Travel Just a Concept?
- shadowman
- · Replies 71 ·
Graduate What is the primary concept between absoluteness and relativity?
- Michael F. Dmitriyev
- · Replies 9 ·
Undergrad Does Time Dilation Make Me See More?
- omin
- · Replies 4 ·
Graduate Units of the metric tensor and 4-vectors in relativity
- Sammywu
- · Replies 18 ·
Undergrad Gravity: Attraction of Two Particles vs. Two Objects
- imi
- · Replies 4 ·
Graduate Has ayone seen the lost simultaneity?
- geistkiesel
- · Replies 114 ·
Graduate Does the rod rotating or the flashlight appear first to the distant astronaut?
- petmar
- · Replies 11 ·
Graduate Movement through space or movement through time?
- kurious
- · Replies 2 ·
Graduate Does mass decrease with expansion
- Mike2
- · Replies 4 ·
Graduate Questions of the equivalence principle
- Garth
- · Replies 8 ·
Graduate What Did Einstein Mean by "Everything Travels at the Speed of Light"?
- RAD4921
- · Replies 10 ·
Graduate Equivalence and derivation of general relativity
- kurious
- · Replies 2 ·
High School Why Can't Anything Travel Faster Than Light?
- Riko
- · Replies 19 ·
Undergrad Clarifying Confusion: Understanding Einstein's Theory of Relativity
- Alkatran
- · Replies 3 ·
Graduate Today Special Relativity dies
- ram1024
- · Replies 529 ·
Graduate Is the temperature of a black hole infinite as its mass approaches zero?
- kurious
- · Replies 2 ·
Graduate Solving the Riddle of Sorts: Who Signed the Peace Agreement First?
- Tom McCurdy
- · Replies 4 ·
Graduate Red shift frequency from a black hole
- Tyro
- · Replies 1 ·
Graduate Today Special Relativity is still alive
- Lama
- · Replies 22 ·
Graduate Michelson - Morley Experiment Revisited
- energia
- · Replies 81 ·
If we are light, what would we see?
- touqra
- · Replies 10 ·
Graduate How do gravitons behave in relation to general relativity?
- fbsthreads
- · Replies 1 ·
Graduate Does the gravitational force actually exist?
- Arawn
- · Replies 10 ·
Graduate Unification of Quantum Theory and General Relativity
- PFanalog57
- · Replies 6 ·
Graduate Resolve the Bug-Rivet Paradox - Strange SR Paradox
- zefram_c
- · Replies 5 ·
Graduate Curvature and General Relativity
- kurious
- · Replies 11 ·
Graduate What do clocks B and B* read when trains meet at opposite ends?
- yogi
- · Replies 16 ·
Graduate Why Does Time Behave So Uniquely in the Sun's Core?
- idontthinkright
- · Replies 2 ·
Undergrad What Happens to Gravitational Force at the Center of the Earth?
- uranium_235
- · Replies 9 ·
Graduate Official speculation as to constant c
- meemoe_uk
- · Replies 10 ·
Graduate Experiments and predictions supporting special and general relativity
- Chi Meson
- · Replies 28 ·
Graduate Can string/brane theory generate spacetime warps with gravitons?
- selfAdjoint
- · Replies 12 ·
Graduate Curvature of reciprocal Euclidean space
- Loren Booda
- · Replies 2 ·
Graduate Two event horizons in close proximity
- kurious
- · Replies 4 ·
Will 2025 be the next big celebration for physics?
- quartodeciman
- · Replies 2 ·
Graduate Richard Feynman's Spacetime Paradox: Can We Know Things in Space-Like Intervals?
- Hyperreality
- · Replies 2 ·
Graduate Does black hole entropy measure information content?
- kurious
- · Replies 6 ·
Graduate Can Gravitational Waves Influence Photon Polarization in EPR Experiments?
- kurious
- · Replies 1 ·
Graduate Wavelength, amplitude and energy of gravitational waves detected by LIGO
- kurious
- · Replies 2 ·
Undergrad Calculating speed from acceleration
- confutatis
- · Replies 23 ·
Graduate False Claims of Gravity Propagation Limit
- Växan
- · Replies 3 ·
Graduate Do Gravitons Lose Energy in a Proton's Gravitational Field?
- kurious
- · Replies 1 ·
Graduate Einstein's Train and a simple consequence
- robert Ihnot
- · Replies 10 ·
Graduate Isn't this a weak basis for time paradoxes ?
- ndvcx
- · Replies 94 ·
Graduate Equivalence principle + light speed postulate =
- Loren Booda
- · Replies 6 ·
Graduate General relativity and Newton's laws
- kurious
- · Replies 5 ·
Graduate Stress-energy tensor transformation under coordinate scaling
- Sammywu
- · Replies 4 ·
Graduate Why do people talk as if the Twin Paradox is problematic?
- syano
- · Replies 43 ·
Graduate Why does Einstein say your space and time mix with mine?
- Ygmaince241
- · Replies 4 ·
Graduate How are the Riemann tensor of curvature and the Hamilton operator connected?
- member 11137
- · Replies 2 ·
Graduate Is the black drop effect an SR or GR phenomenon?
- OneEye
- · Replies 6 ·
High School Gravity Above 8000km: How Distance Affects Attraction
- no idea
- · Replies 5 ·
High School Why time travel requires reversing all atoms in the universe
- smurfslappa
- · Replies 10 ·
Graduate Riemann-Christoffel Covariant differentation
- Jinroh
- · Replies 6 ·
Undergrad Why does time dilation occur in relativity?
- Ulnarian
- · Replies 11 ·
Graduate Can you solve Einstein's Train Paradox?
- geistkiesel
- · Replies 28 ·