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 A better way to imagine the time space continuum.
- the_truth
- · Replies 6 ·
High School Why is the speed of light independent of the observer's motion?
- LedZep_Kamal
- · Replies 18 ·
Graduate Linear vs Sagnac: Examining Arrival Time Differences
- TheAntiRelative
- · Replies 16 ·
Graduate Is the Hafele-Keating experiment really reliable?
- Yehuda
- · Replies 5 ·
Graduate Why is the Speed of Light Squared in Special Relativity?
- Swampeast Mike
- · Replies 39 ·
Graduate How can we physically travel through time?
- Rook225
- · Replies 6 ·
Graduate Why does rest energy include c squared if the particle isn't moving?
- asdf1
- · Replies 17 ·
Graduate Can the speed of light be considered an absolute?
- neopolitan
- · Replies 4 ·
Undergrad Why the michelson-morley experiment is not reliable
- johanen
- · Replies 3 ·
Undergrad Why is the Speed of Light Squared in E=mc^2?
- free_mind
- · Replies 78 ·
Graduate Speed Of Light and stimilation
- Spin_Network
- · Replies 2 ·
Graduate Question from Rindler's Introduction to Special Relativity
- learningphysics
- · Replies 5 ·
Graduate How Time Stands Still: r=GM/c^2
- gunblaze
- · Replies 2 ·
Graduate Proving Energy-Momentum Tesor Relation
- samalkhaiat
- · Replies 2 ·
Graduate Reimagining Science: Space, Time, and Gravity in a New Light
- dgoodpasture2005
- · Replies 2 ·
Undergrad The attraction of light by gravity
- The Sphinx
- · Replies 4 ·
Graduate Traveling Fast and Infinite Mass
- Cladson
- · Replies 4 ·
Undergrad Everything in the universe is related
- Caesar_Rahil
- · Replies 10 ·
Graduate What Explains the Variation in Gamma-Ray Burst Spectral Time Lags?
- wolram
- · Replies 6 ·
Graduate Where do gravitational waves fit in the electromagnetic spectrum?
- Vast
- · Replies 7 ·
Graduate Minkowski space, non-Euclidean geometry, and rotating frames
- dekoi
- · Replies 2 ·
Undergrad Can gravitons travel in a vacuum?
- bola
- · Replies 6 ·
Undergrad Explaining time dilation and the twin paradox to a skeptic
- GSwindle
- · Replies 2 ·
Graduate Some conceptual questions on SR
- Reshma
- · Replies 14 ·
Graduate Can tachyons travel backward in time if they exceed light speed?
- Caesar_Rahil
- · Replies 6 ·
Graduate Traveling to the Future with Speed of Light - Can it be True?
- gunblaze
- · Replies 3 ·
Graduate Why did Einstein try to unify GR and EM if SR already made EM consistent?
- εllipse
- · Replies 2 ·
Graduate Place to discuss the Theory of Relativity
- Daminc
- · Replies 98 ·
Graduate Einstein's Belief: Everything Moving at Speed of Light?
- RAD4921
- · Replies 7 ·
Graduate Lorentz Contraction of a Rotating Object
- SahinTC
- · Replies 15 ·
Graduate Time and the Sound Barrier: How Fast is Too Fast?
- Tjl
- · Replies 9 ·
Graduate What Is Minkowski's Geometric in Relativity
- yukcream
- · Replies 2 ·
Graduate Gravity of Light: Can a Laser Beam Generate Its Own Field?
- Iridium
- · Replies 5 ·
Graduate Could a spaceship escape a black hole using fuel?
- melknin
- · Replies 30 ·
Graduate Can absolute space and time explain relativistic effects?
- Eppur si muove
- · Replies 15 ·
Graduate J Baez' The meaning of Einstein's Equations
- DaTario
- · Replies 5 ·
Graduate Is time relative for each observer in motion?
- Jeremy
- · Replies 35 ·
Graduate How to calculate speed of gravity in GR?
- cefarix
- · Replies 2 ·
Undergrad Why do motionless objects gravitate toward each other?
- shrumeo
- · Replies 7 ·
Graduate The difference between felt, and unfelt motion.
- LosBoogie
- · Replies 11 ·
Graduate Why Minkowski spacetime and not Euclidean spacetime?
- cefarix
- · Replies 10 ·
Undergrad How do you explain the twin paradox to a friend
- GSwindle
- · Replies 3 ·
Graduate Minkowski spacetime interval's Lorentz invariance
- cefarix
- · Replies 2 ·
Graduate How do general relativity and quantum mechanics contradict each other?
- abercrombiems02
- · Replies 2 ·
Graduate Experiences of particles moving at relativistic speeds in non-vacuum
- ACG
- · Replies 6 ·
Graduate Does Quickly Moving Object Have More Gravitational Mass?
- LeonhardEuler
- · Replies 5 ·
Undergrad What Are Gravity Waves and How Do They Work?
- amt
- · Replies 30 ·
Graduate Resolving the Twin Paradox: A Mathematical Approach
- rczmiller
- · Replies 3 ·
High School What is general relativity really about?
- yukcream
- · Replies 3 ·
Graduate Postulates and assumptions in the Lorentz equations derivation
- Aer
- · Replies 13 ·
Undergrad The Speed of Light: Theory of Special Relativity
- Rainbow
- · Replies 8 ·
High School What in the world does E =mc2 mean?
- Matthias765
- · Replies 32 ·
Graduate Do Massless Particles Like Gravitons Interact With the Higgs Field?
- nabodit
- · Replies 26 ·
Graduate Energy in a volume changing the geometry
- DaTario
- · Replies 28 ·
High School Twin Born On Earth and in Space - Age Difference
- aznpride2pac
- · Replies 8 ·
Graduate Theory of General Relativity: Reason for Heavenly Bodies Creating Spacetime Dent
- Rainbow
- · Replies 4 ·
Graduate Gravity Probe B: Gyroscope Orientation and Precession
- Paulanddiw
- · Replies 2 ·
Graduate Understanding Relativistic Kinetic Energy in Lab Experiments
- Pengwuino
- · Replies 2 ·
Graduate Twin paradox, live via satellite
- Pengwuino
- · Replies 10 ·
Graduate Questioning Relative Mass Magnification by a Moving Observer
- DaTario
- · Replies 2 ·
Graduate Blackhole decay and gravitational wave
- nabodit
- · Replies 7 ·
Undergrad Is the Big Bang Theory Misunderstood in Terms of Expansion and Gravity?
- yourdadonapogostick
- · Replies 9 ·
Graduate GR resolves galactic rotation without dark matter
- selfAdjoint
- · Replies 5 ·
Graduate Is the Twin Paradox Misunderstood in Terms of Aging Differences?
- DaTario
- · Replies 5 ·
Graduate Angular momentum at near-c velocities
- Mortimer
- · Replies 10 ·
Graduate What are the prerequisites for understanding Lorentz transformations?
- preet0283
- · Replies 4 ·
Graduate Can particles and geometry coexist in gravitational theory?
- mewmew
- · Replies 3 ·
Graduate Fermi-Walker transport - problem with a minus sign
- mikeu
- · Replies 3 ·
Graduate Does relativistic mass increase perpendicular to motion?
- Antiphon
- · Replies 16 ·
Graduate How to measure the length of a moving rod in special relativity
- paco1955
- · Replies 4 ·
Graduate Prove rectilinear motion given four-acceleration and four-velocity?
- learningphysics
- · Replies 6 ·
Graduate Why relativity of simultaneity makes events non-simultaneous in different frames
- theelusivecamel
- · Replies 3 ·
Graduate Noether's theorem and Time invariance?
- raid517
- · Replies 4 ·
Graduate Special Relativity and Mass Variation
- rczmiller
- · Replies 14 ·
Graduate Hawking on Euclidean quantum gravity for nonperturbative physics
- CarlB
- · Replies 2 ·
Graduate Prove Tidal Distortion Volume Conservation Mathematically
- cygnus2
- · Replies 2 ·
Graduate Time machines and rotating cylinders
- DaveC426913
- · Replies 2 ·
Graduate What do we know about gravitation?
- professor
- · Replies 14 ·
Undergrad Why is gravity described as bending space instead of just an attractive force?
- questionauthority
- · Replies 9 ·
Graduate An old new kind of observer dependency: is v > c possible if nobody was looking?
- EnumaElish
- · Replies 3 ·
Graduate Accomodating relativity to dark matter
- Loren Booda
- · Replies 3 ·
Graduate Wave equation for light in curved spacetime
- dand5
- · Replies 5 ·
Graduate Is Time a Dimension or a Field?
- pattylou
- · Replies 9 ·
Graduate H and Infinity: What Happens to Time and Distance at the Event Horizon?
- Draya22
- · Replies 9 ·
Graduate Why Must the Universe Expand or Contract According to General Relativity?
- Symbreak
- · Replies 2 ·
Graduate General Relativity and EM - Heim Theory
- Antiphon
- · Replies 1 ·
Graduate Einstein's:Mass increase resulting from Acceleration increase
- Spin_Network
- · Replies 30 ·
Graduate Is Rotation in x and y Invariant at the Origin in a Rotating Coordinate System?
- pervect
- · Replies 6 ·
Graduate Contraction index for Ω·e in Fermi normal coordinates
- mikeu
- · Replies 4 ·
Graduate Gravity doughnut may solve time travel problem
- Ivan Seeking
- · Replies 3 ·
Graduate Fermi-Walker transport non-rotating particle
- pervect
- · Replies 7 ·
Graduate Gravitational redshift +blackbody spectrum
- virtual
- · Replies 2 ·
Graduate Can spacetime as a rubber sheet be taken literally or merely as pedagogic?
- EnumaElish
- · Replies 25 ·
Graduate How Does General Relativity Explain the Motion of Earth and Light?
- mxur
- · Replies 2 ·
Undergrad General Relativity in the Undergraduate Physics Curriculum
- ZapperZ
- · Replies 30 ·
Graduate Relativity - facing backwards on a train
- rczmiller
- · Replies 9 ·
Undergrad Why does light accelerates after being slowed down
- ludi_srbin
- · Replies 12 ·
Graduate Why Do Photons Travel at the Speed of Light?
- ludi_srbin
- · Replies 4 ·
Graduate C constant to the observer as well?
- neurocomp2003
- · Replies 2 ·
Graduate General Relativity Postulates and History of Publication
- εllipse
- · Replies 5 ·