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 In space with no reference frame, who ages in the twin paradox?
- Physicist1231
- · Replies 26 ·
Graduate Understanding curvature tensor equation
- avery
- · Replies 13 ·
Graduate Snell's law and General Relativity
- avery
- · Replies 2 ·
Graduate Historical question: Equations of motion from lagrangian
- solveforX
- · Replies 2 ·
Graduate How does the duration of acceleration affect the Twin Paradox?
- Karl Coryat
- · Replies 43 ·
Undergrad Is Time Dilation Caused by Distance?
- R Power
- · Replies 7 ·
Graduate How does mass cause the curvature of spacetime at a distance?
- replaced
- · Replies 6 ·
Graduate Couldn't you accelerate past light by means of gravitational acceleration?
- questionpost
- · Replies 12 ·
Graduate What is the relationship between particle and energy frames in fluid dynamics?
- bloby
- · Replies 5 ·
Graduate Need a code to construct an antisymmetric tensor with Mathematica 6.
- gda
- · Replies 14 ·
Graduate Does an object emitting electromagnetic radiation really lose mass?
- Bararontok
- · Replies 4 ·
Graduate Where did I go wrong deriving the Einstein tensor?
- nobraner
- · Replies 8 ·
Graduate How important is the research LISA would do if they ever finished building?
- fellupahill
- · Replies 11 ·
Graduate Why doesn't Diffeomorphism Invariance lead to Scale Invariance?
- lugita15
- · Replies 40 ·
Undergrad Relative motion and collisions
- imcurious
- · Replies 7 ·
Graduate Einstein thought experiment, different outcome of a same event
- rajeshmarndi
- · Replies 17 ·
Graduate How to show that the electromagnetic 4-potential is a 4-vector
- quantum123
- · Replies 20 ·
Graduate Name Of A Good Book (Modern Physics)
- M. next
- · Replies 8 ·
Graduate A Dissident View of Relativity Theory
- mangaroosh
- · Replies 7 ·
Graduate Can you return to Earth traveling in a straight line at constant velocity?
- Snip3r
- · Replies 17 ·
Graduate Relativistic speeds going perpendicular
- Swankie
- · Replies 2 ·
Graduate Why does light speed stay constant for moving sources?
- imcurious
- · Replies 10 ·
Graduate Real experiments measuring the speed of gravity
- Alvydas
- · Replies 1 ·
Graduate Permittivity, permeabiltiy and gravity
- Chronos
- · Replies 5 ·
Graduate Direct observation of lorentz length contraction
- rajeshmarndi
- · Replies 8 ·
High School Is My Time Dilation Equation Correct?
- svijay1991
- · Replies 51 ·
Undergrad How do we know light travels at speed c?
- eoghan
- · Replies 9 ·
Graduate Why does light seem to slow down when passing through transparent materials?
- Dorje
- · Replies 19 ·
Graduate How Does the Principle of Extremal Aging Determine the Path of a Free Object?
- dpa
- · Replies 5 ·
Graduate Can electric field in wormholes remain stable?
- skippy1729
- · Replies 1 ·
Graduate Sciama's Machian Origin of Inertia
- johne1618
- · Replies 5 ·
Undergrad Is Dark Energy the Cause of the Universe's Accelerating Expansion?
- phy_freak
- · Replies 2 ·
Graduate Effect of Gravity on the Speed of Light
- finbarLay
- · Replies 26 ·
Graduate Is the vacuum stress energy tensor Lorentz invariant ?
- notknowing
- · Replies 8 ·
High School Can gravity be destroyed explain
- joy1
- · Replies 7 ·
Graduate Tachyonic Energies in a Minkowski Metric
- gravitowell
- · Replies 4 ·
Undergrad What happens to distance if an object travels instantaneously?
- Ulnarian
- · Replies 24 ·
Graduate Can Protons Reach 199.99998% the Speed of Light in Collisions?
- Andrew Aidan
- · Replies 12 ·
Graduate Do balck holes violate the constancy of the speed of light
- The5thElement
- · Replies 4 ·
Graduate About the instability of wormholes
- snoopies622
- · Replies 11 ·
Graduate Gravitational Acceleration and Rising Objects
- Jason0725
- · Replies 3 ·
Graduate How Does Time Behave from the Perspective of Light in Relativity?
- Duder999
- · Replies 9 ·
Graduate Photons of different energy follow different geodesics?
- jnorman
- · Replies 23 ·
Graduate Is the Principle of Relativity Valid for Faster-than-Light Propagation?
- nikeadidas
- · Replies 92 ·
Graduate Is Time Reversed in Special Relativity When Moving Opposite to Light?
- ghost34
- · Replies 3 ·
Graduate Time dilation in acceleration or velocity
- morningstar
- · Replies 23 ·
Undergrad Basic questions on the speed of light
- Helicobacter
- · Replies 11 ·
Graduate Lightcones in advanced Eddington-Finkelstein coordinates
- peter46464
- · Replies 8 ·
Graduate Interference Pattern versus SR
- Adel Makram
- · Replies 154 ·
Undergrad Can light be transmitted through a fluid medium?
- Tracer
- · Replies 2 ·
Graduate Does an object gain mass and contract at relativistic speeds?
- Swankie
- · Replies 2 ·
Graduate Does photon have a rest frame?
- RiddlerA
- · Replies 25 ·
Graduate Visual effects of traveling near light speed at 1g acceleration
- zeroxg
- · Replies 1 ·
Undergrad Question of Relativity and the Speed of Light?
- WLatourelle
- · Replies 3 ·
Undergrad What is the speed of gravitational waves?
- s.martie07
- · Replies 3 ·
Graduate Light in local reference frames in extreme gravitational fields.
- JPBenowitz
- · Replies 4 ·
Graduate Is curved space cancelled between two massive bodies?
- Buckethead
- · Replies 6 ·
Graduate Velocity addition formula for multiple velocities within each other
- um0123
- · Replies 6 ·
Graduate Warping of space and special relativity?
- SUROJL
- · Replies 45 ·
Undergrad Wormholes for Dummies: Calculating Distance
- 19061988
- · Replies 2 ·
Graduate Hi,After having studied special relativity, I sometimes see things
- apolloe
- · Replies 2 ·
Graduate What Does It Mean to Travel at the Speed of Light in the 4th Dimension?
- Zac Einstein
- · Replies 16 ·
Graduate Why does E=MC² use the speed of light squared as a constant?
- nazarbaz
- · Replies 1 ·
Graduate Theories for Mechanisms Underlying SR/GR?
- Islam Hassan
- · Replies 23 ·
Graduate Can I see simultaneous light bolts from a moving train's ends?
- kwestion
- · Replies 51 ·
Graduate Would someone care to elaborate
- dpa
- · Replies 9 ·
Undergrad Why don't two spaceships at 90% light speed see each other at 180% the speed of light?
- lnsanity
- · Replies 2 ·
Graduate Is the flow of time at rest a universal constant?
- fbs7
- · Replies 12 ·
Graduate Is Time Travel Possible with Quantum Mechanics?
- questionpost
- · Replies 2 ·
Graduate 8-dimensional Minkowski spacetime
- rodsika
- · Replies 26 ·
Undergrad Timetraveller killing himself in the past
- fawk3s
- · Replies 66 ·
Graduate Finding solutions to Schutz's First Course in General Relativity
- Goldbeetle
- · Replies 1 ·
Graduate Relativistic aberration and locally measured electric flux density
- kmarinas86
- · Replies 4 ·
Graduate Higgs free space travelling, close to lightspeed possible ?
- digi99
- · Replies 3 ·
Graduate Special Relativity Spacetime Intervals
- swashtecher
- · Replies 3 ·
Graduate Inverse of an operator does not exist, can't see why
- Elwin.Martin
- · Replies 4 ·
Graduate Photon's disagree of the state of the universe?
- JPBenowitz
- · Replies 2 ·
Undergrad A question on Special Relativity
- alexela
- · Replies 10 ·
Graduate Anomalous acceleration of Pioneer 10 and 11
- lalbatros
- · Replies 27 ·
Graduate Does Relativity Affect Electric Flux Through a Gaussian Surface?
- kmarinas86
- · Replies 26 ·
Graduate Relation between Time-Dilation and Radioactivity
- universal_101
- · Replies 4 ·
Graduate A question in the Feynman Lectures on physics,chapter 15-4
- Haixu
- · Replies 2 ·
Graduate Can Two Rockets Outrun Each Other's Light Signals in Space?
- spacebear2000
- · Replies 11 ·
Graduate Does the CMB move or is it static?
- MarcJo
- · Replies 3 ·
Graduate Is there a contradiction here.
- dpa
- · Replies 8 ·
Graduate Raising/Lowering indices and matrix multiplication
- homology
- · Replies 9 ·
High School Age of Universe relative to what?
- goodabouthood
- · Replies 155 ·
Graduate Infinite universe x Deceleration of expansion
- fbs7
- · Replies 14 ·
Graduate Brian Greene, spinning bucket and acceleration
- fisico30
- · Replies 15 ·
Graduate A mechanism for Mach's Principle?
- johne1618
- · Replies 1 ·
Graduate Inertial frames and related predictions
- spaghetti3451
- · Replies 3 ·
Graduate Increase of Mass With Relative Velocity Proven?
- Islam Hassan
- · Replies 14 ·
Graduate Doesnt information travel faster than light in case of black holes?
- rahuljayanthb
- · Replies 4 ·
Graduate Euclidean Quantum Gravity and its relevance
- Fractalismus
- · Replies 1 ·
Graduate Speed of light = oo mass = black hole?
- MassiveMass
- · Replies 39 ·
Graduate Geometric Understanding of Tensors.
- dpa
- · Replies 6 ·
Graduate Does anyone else question general relativity?
- vdawg
- · Replies 1 ·
Graduate How does general relativity explain the rotating bucket with Mach's principle?
- exponent137
- · Replies 9 ·
Graduate ST Does Spacetime Actually Curve?
- ginarific
- · Replies 29 ·
Graduate Vacuum Energy in SR: A Relativity Question
- kcdodd
- · Replies 3 ·