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 Are there simultaneous moments?
- Unidempicity
- · Replies 9 ·
Graduate Canonical Momenta Action Electromagnetism
- Yoran91
- · Replies 4 ·
Graduate Defining Kruskal coordinates u' and v' inside the event horizon
- maxverywell
- · Replies 5 ·
Graduate Questions concerning GPS Navigation
- edraganov
- · Replies 8 ·
Undergrad Does time effect slowed light or not?
- Neuronsarecool
- · Replies 12 ·
Graduate Laws of Physics: Same Everywhere?
- Neuronsarecool
- · Replies 1 ·
Graduate Time dilation in gravitational field
- tonychinnery
- · Replies 24 ·
Can Closed Timelike Curves Make Time Travel Possible?
- D00dman
- · Replies 2 ·
Graduate Does Length Contraction Occur in All Directions for a Speeding Object?
- Dgonzo15
- · Replies 3 ·
Graduate General matrix representation of lorentz boost
- highwaychile
- · Replies 2 ·
Graduate Two ships again [lets beat that dead horse]
- nearc
- · Replies 29 ·
Undergrad Does length contraction affect properties other than length?
- durant
- · Replies 17 ·
Graduate Equation of state of photon gas
- 4everphysics
- · Replies 1 ·
Graduate Why doesn't the ladder keep its proper length in the ladder's rest frame?
- durant
- · Replies 24 ·
Graduate Faster than speed of light = time travel ?
- collector
- · Replies 7 ·
Graduate Michaelson-Morley expt. problem
- rushikesh
- · Replies 4 ·
Graduate Do the Large Hadron Collider take earth's rotational speed?
- howabout1337
- · Replies 38 ·
Graduate Center of mass in 3D and relativistic speeds
- Dgonzo15
- · Replies 2 ·
High School How is the constancy of light speed proven in theory or experiment?
- 462chevelle
- · Replies 4 ·
Graduate Calculating Relativity with Different Speeds: Vacuum or Medium?
- User11037
- · Replies 5 ·
Graduate Is Widely Separated in Relativity About Space or Perception?
- Physic lover
- · Replies 19 ·
Graduate How is the effective Lagrangian for the Graviton coupling to matter derived?
- Karatechop250
- · Replies 5 ·
Graduate Magnetic field relativistic effect
- cabrera
- · Replies 15 ·
High School Speed of photons and its effect on us
- giananimohit
- · Replies 10 ·
Graduate Spherical symmetric collapse of pressureless dust
- tom.stoer
- · Replies 3 ·
Graduate The light-cone and light-cone variables
- Demon117
- · Replies 3 ·
Undergrad Perceiving light/lighspeed (question)
- AnonymousTeen
- · Replies 15 ·
Graduate Feynman's vs wiki's relativistic resultant
- galvin452
- · Replies 7 ·
Graduate Photons live in a singularity?
- wjmt88
- · Replies 11 ·
Graduate Proper time of a 'half-moving object'
- durant
- · Replies 86 ·
Graduate Conservation of Relativistic energy and momentum
- tade
- · Replies 11 ·
Graduate Time dilation, reference frames
- casualreader
- · Replies 6 ·
Graduate Measuring Length with Oscillating Rods
- satyudhi
- · Replies 1 ·
Graduate If light-speed is invariant,why RoS exist?
- ash64449
- · Replies 2 ·
Undergrad What does the time dilation equation t=t(p)*γ mean and when do you use it?
- Dgonzo15
- · Replies 2 ·
Graduate Can we really ever accurately test SR time dilation?
- DiracPool
- · Replies 123 ·
Graduate Confusion about Lorentz Transform
- thrush
- · Replies 3 ·
Undergrad Good books on both Relativities
- JamesOrland
- · Replies 29 ·
Graduate Schwarzchild radial coordinate
- maxverywell
- · Replies 13 ·
Graduate EFE Solutions: Kerr, Mass, Energy, Metric Tensor
- zepp0814
- · Replies 3 ·
Graduate Does an accelerating object produce gravitons like gravity does?
- dubiousraves
- · Replies 2 ·
Graduate Why does Greene say a photon sweeps a 45-degree line if it experiences no time?
- ChrisXenon
- · Replies 50 ·
Graduate On Einstein´s theory of curved spacetime.
- svenraun
- · Replies 3 ·
Graduate Local flatness for non-freely falling observers?
- center o bass
- · Replies 40 ·
Graduate Time dilation: 5 seconds on Earth vs. the light beam's frame at 0.7c
- Dgonzo15
- · Replies 2 ·
Undergrad Time Dilation Equation: Clarifying Variables
- Dgonzo15
- · Replies 3 ·
Graduate Hidden momentum in magnetic dipoles and monopole systems
- bcrowell
- · Replies 13 ·
Graduate Classic or General Relativity: Photon in Gravitational Field
- birulami
- · Replies 1 ·
Graduate Time-dialation and light clock
- Erika E.
- · Replies 3 ·
High School Do we live in 3 or 4 dimensions?
- Stricklandjr
- · Replies 71 ·
Graduate What are the equations for a massless particle's worldline?
- NeedsHelpBadly
- · Replies 15 ·
What do black holes look like?
- DeeAytch
- · Replies 10 ·
Graduate Does the smooth twin paradox give the same result in SR and GR?
- epovo
- · Replies 40 ·
Graduate Why does Born rigidity resolve Ehrenfest's paradox?
- center o bass
- · Replies 36 ·
Graduate 3 questions regarding velocity and the speed of light
- mpatryluk
- · Replies 6 ·
Graduate How can an object have invariant identity if its parts lack simultaneous composition?
- durant
- · Replies 13 ·
Graduate Photon frequency in different inertial frames
- MHD93
- · Replies 2 ·
Graduate Which interpretation of relativistic momentum is standard?
- SheikYerbouti
- · Replies 6 ·
Graduate Is gravity a force, or the curvature of space?
- Thomas1989
- · Replies 6 ·
Graduate What are closed time-like curves and how are they related to General Relativity?
- zepp0814
- · Replies 7 ·
Undergrad Is Speed an Illusion in Physics?
- megacal
- · Replies 12 ·
Graduate Is Time Slowing or Are Processes Slowing Near High Gravity and Speeds?
- dayalanand roy
- · Replies 137 ·
Undergrad Question Regarding Perception of Time
- Billiards1974
- · Replies 11 ·
Graduate How do we know space and time are related?
- ryanvb03
- · Replies 20 ·
Graduate Why does Jack observe me at speed v if I observe him at v?
- Izzhov
- · Replies 7 ·
High School Gravity at Earth's Center: Does Weightlessness Follow?
- enokwei perez
- · Replies 9 ·
Graduate Ricci tensor of the orthogonal space
- PLuz
- · Replies 3 ·
Graduate Can time be stopped in special relativity?
- durant
- · Replies 13 ·
Graduate Definition of isometry in components form
- maxverywell
- · Replies 12 ·
Graduate Reference frames, reference particles, coordinate systems and all that
- center o bass
- · Replies 18 ·
Graduate Photon Mass and Momentum: Train Experiment
- lntz
- · Replies 4 ·
Graduate Gravitation in General Relativity.
- klen
- · Replies 5 ·
Undergrad Einstein notion of time and the oscillation of the cesium atom
- azoulay
- · Replies 99 ·
Graduate Are point-wise tetrads the same as local Lorentz frames in GR?
- WannabeNewton
- · Replies 47 ·
Graduate Does Special Relativity Predict Zero Acceleration in Free Fall?
- harrylin
- · Replies 177 ·
Graduate Outrunning Light; how quickly will light catch up with you
- CarsonAdams
- · Replies 5 ·
Graduate Can two observers at different locations experience the same event simultaneously?
- Salman2
- · Replies 10 ·
Graduate Minkowski diagram, what does observer see.
- Myslius
- · Replies 26 ·
Graduate Does Omega_tot=1 mean the universe is flat, or does matter curve spacetime?
- Madster
- · Replies 11 ·
Graduate Thomas Precession, Angular Momentum, and Rotating Reference Frames
- Izzhov
- · Replies 6 ·
Graduate Can a father be younger than his son due to time dilation?
- kannan_k
- · Replies 4 ·
Graduate Can we truly understand motion through spacetime?
- maxverywell
- · Replies 18 ·
Graduate Any in depth explanations on why near lightspeed affect aging?
- viktorem
- · Replies 21 ·
Graduate Is there always the same amount of spacetime curvature in the uni.?
- 49ers2013Champ
- · Replies 5 ·
Graduate Gravity is different - infinite energy stored
- Lapidus
- · Replies 4 ·
Graduate Partitioning Mass in GR: A Cautionary Tale
- pervect
- · Replies 3 ·
Undergrad What keeps the planets in orbit
- G.U.T.finder
- · Replies 2 ·
Graduate Gravity exerted by a fast moving object versus stationary object?
- bcrelling
- · Replies 61 ·
Graduate Lorentz transformation matrix applied to EM field tensor
- qtm912
- · Replies 8 ·
Graduate Geometric Description of Free EM Field
- dextercioby
- · Replies 5 ·
Graduate Timelike Killing vector field and stationary spacetime
- maxverywell
- · Replies 21 ·
Graduate E=MC^2 Mass and Energy, synonymous?
- slickjunt
- · Replies 79 ·
Graduate Why do we move at the speed of light?
- guitarphysics
- · Replies 41 ·
Graduate Is there really no answer to what gravity is?
- slibbfalusken
- · Replies 11 ·
Graduate Need Intuition Behind Expansion of Smaller Structures in the Universe
- mmiguel
- · Replies 13 ·
Graduate Wrong signs Ricci tensor components RW metric tric
- enomanus
- · Replies 2 ·
Graduate Is the Speed of Light Tied to the Plank Distance and Time?
- Quinzio
- · Replies 11 ·
Graduate Energy left of body falling down to Schwarzschild radius
- Agerhell
- · Replies 12 ·
Graduate Spherically symmetric spacetime
- maxverywell
- · Replies 8 ·
Graduate Why there is a minus sign in the Killing's equation
- maxverywell
- · Replies 2 ·