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 Gravitation #3.14: Showing dF=0 as Geometric Version of Maxwell's Equations
- Living_Dog
- · Replies 3 ·
Undergrad Could the Speed of Light Have Changed Throughout History?
- argha
- · Replies 10 ·
Undergrad How can distance traveled differ between reference frames?
- coldbreeze10
- · Replies 3 ·
Graduate Is it Possible to Travel Faster than the Speed of Light?
- James S Saint
- · Replies 205 ·
High School Why c squared in E=mc²
- MarsWTF
- · Replies 27 ·
Graduate Relativistic particle in Coulomb potential - any analytic solution?
- petergreat
- · Replies 9 ·
Graduate Ideas for exceeding the speed of light
- Caelus
- · Replies 15 ·
Graduate Photons in a Box Contribute Weight
- cbd1
- · Replies 38 ·
Graduate Problem with fluid mechanics part of GR derivation
- andrewkirk
- · Replies 5 ·
Graduate Is Velocity Addition in Special Relativity Contradictory?
- calebhoilday
- · Replies 156 ·
Graduate Energy conservation and universe expansion
- nomadreid
- · Replies 5 ·
Undergrad Why does the traveling twin age differently if both see the other's clock slow?
- atomqwerty
- · Replies 8 ·
Graduate Currently understand by parallel transport
- Rasalhague
- · Replies 9 ·
Graduate How Might GR and Mach's Principle Explain Cosmic Redshift?
- Austin0
- · Replies 13 ·
Graduate Would mirrors reflect normally at 0.99c or near a black hole's event horizon?
- Nickelodeon
- · Replies 2 ·
Graduate General relativity does not seem to address gravity
- LostConjugate
- · Replies 20 ·
Graduate General formula for space-time distortion?
- Cirion
- · Replies 14 ·
Graduate Is it possible to determine absolute speed?
- bkelly
- · Replies 94 ·
Graduate Relativity train and clock synchronization
- BHollis
- · Replies 5 ·
Graduate How does thermal energy affect rest mass in Relativity?
- DaTario
- · Replies 30 ·
Graduate Should centrifugal force be considered real rather than fictitious?
- e2m2a
- · Replies 83 ·
Graduate Some technical questions about Birkhoff's theorem
- bcrowell
- · Replies 4 ·
Undergrad How we transform enery into mass?
- hager mahdy
- · Replies 7 ·
Undergrad F = ma doesn't work when aproaching c
- Jacob_hull
- · Replies 3 ·
Graduate An example of moving towards a light source
- atomqwerty
- · Replies 5 ·
Graduate How did Einstein Use Minkowski Spacetime to Derive E=mc2?
- kaleidoscope
- · Replies 1 ·
Graduate Tangent space vs. Vector space
- Troponin
- · Replies 7 ·
Graduate From special to general relativity: why?
- Goldbeetle
- · Replies 5 ·
Graduate Do photons age? Do they remain stationary in x4?
- brunoeinstein
- · Replies 67 ·
Graduate Break Speed of Light: What Happens Next?
- almi
- · Replies 5 ·
Graduate Solving Lorentz Transformations for Light Speed c
- RK1992
- · Replies 2 ·
Graduate Time dilation inside the second horizon of the BH
- Dmitry67
- · Replies 1 ·
Graduate Phase vs group vs signal velocities
- nomadreid
- · Replies 4 ·
Graduate Thomas rotation in exercise 103 of Spacetime Physics
- Rasalhague
- · Replies 10 ·
Graduate Light bouncing between approaching mirrors at 0.6c
- stevmg
- · Replies 54 ·
Graduate Experimentally probing the photon's reference frame
- DaTario
- · Replies 4 ·
Undergrad When is the spacecraft arrival detected?
- nickek
- · Replies 2 ·
Undergrad Why time is a separate physical quantity
- ehpc
- · Replies 38 ·
Undergrad Time dilation or time relativity?
- kaleidoscope
- · Replies 4 ·
Graduate Verifying Equation for Particle Energy (E): p=γpmv
- seto6
- · Replies 2 ·
Graduate Reframing and further acceleration
- brainstorm
- · Replies 15 ·
Graduate Do closed timelike curves violate the no-cloning theorem?
- bcrowell
- · Replies 1 ·
Undergrad The Smallest blackhole possible?
- Alkatran
- · Replies 29 ·
Graduate Why is the vertical axis in Minkowski space multiplied by light speed?
- kaleidoscope
- · Replies 2 ·
Graduate Can an electric switch function differently at relativistic speeds?
- yuiop
- · Replies 9 ·
Graduate Particle traveling at 0.5c covers only 1.3E8m in 1 second
- kaleidoscope
- · Replies 3 ·
Graduate Does velocity, speed, or acceleration change at relativistic speeds?
- Ali Asadullah
- · Replies 1 ·
Graduate Proving Change in Volume V(t) of Sphere in Free Fall
- victorneto
- · Replies 7 ·
Graduate Is Time Dilation Just an Illusion?
- Nickelodeon
- · Replies 18 ·
Graduate Is Event Sequencing Relative in the Theory of Manifolds?
- Kommandant
- · Replies 81 ·
Graduate Does space curvature need a force to make objects fall into it?
- Line
- · Replies 27 ·
Graduate Everything depends on gravity and mass
- magrant
- · Replies 1 ·
Graduate Does gravity propagate instantaneously or at light speed?
- McKy
- · Replies 34 ·
High School Why do people age less when traveling at light speed?
- nukeman
- · Replies 8 ·
Graduate What is the spacetime fabric beyond the trampoline analogy?
- Thikr
- · Replies 14 ·
Graduate Minkowski-minkowski thin shell paradoxon?
- mersecske
- · Replies 3 ·
Graduate Causality in GR (was Is event sequencing relative? )
- bcrowell
- · Replies 0 ·
Graduate Alternative Lagrange's Equations
- CGR_JAMA
- · Replies 8 ·
Graduate How Spacetime is Stretched/Compressed: Experiments?
- fys iks!
- · Replies 1 ·
Graduate Cosmological redshift as incremental Doppler shift in FRW coordinates
- nutgeb
- · Replies 13 ·
Graduate Clock synchronization in a moving vessel with relativistic velocity adjustment
- calebhoilday
- · Replies 80 ·
Graduate Where do the constants λ and μ come from in Einstein's Lorentz transformation derivation?
- Theseus
- · Replies 4 ·
Graduate What Defines a Null Coordinate in Spacetime Metrics?
- DrGreg
- · Replies 7 ·
Undergrad Understanding Einstein's Theory of Relativity
- ppr2010
- · Replies 3 ·
Graduate What Would Happen if Usain Bolt Ran at the Speed of Light?
- idiotphysics
- · Replies 5 ·
Graduate Does spacetime curvature depend on observer location?
- superkan619
- · Replies 157 ·
Graduate Nothing can travel faster than light
- TheIconoclast
- · Replies 13 ·
Undergrad What Would Happen if an Object Fell in a Vacuum?
- g0dfreak
- · Replies 2 ·
Undergrad How can light reach us if time is frozen for light itself?
- nap
- · Replies 52 ·
Graduate Brown's derivation of Thomas rotation
- Rasalhague
- · Replies 8 ·
High School What was the motive of michelson morley experiment
- abhi-iitb
- · Replies 6 ·
Graduate Why is the first term on the right-hand side of this equation transposed?
- Living_Dog
- · Replies 3 ·
Graduate How Does a Cosmic Ray Measure Temperature Changes in the Sun?
- Living_Dog
- · Replies 6 ·
Graduate Mass increase from high velocity Q
- TheTechNoir
- · Replies 4 ·
Graduate How long does it take to go 10LY?
- jnorman
- · Replies 6 ·
Graduate Why Does Time Differ Between Astronauts and Earth in Relativity Theory?
- MrHayman2
- · Replies 12 ·
Graduate How Do Minkowski Diagrams Illustrate Lorentz Transformations?
- stevmg
- · Replies 2 ·
Graduate Noether currents associated with diffeomorphism invariance
- GargleBlast42
- · Replies 8 ·
Graduate White Holes & Eternal Black Holes: Stephen D.H. Hsu
- bcrowell
- · Replies 0 ·
Graduate Can an object pass through two event horizons of intersecting black holes?
- BkBkBk
- · Replies 3 ·
Graduate Simultaneity of Events in Different Inertial Frames
- CHUKKY
- · Replies 29 ·
Graduate A bit of a confusion regarding light, speed of it
- andyarok
- · Replies 12 ·
Undergrad Does gravity cancel acceleration if a planetoid accelerates at 1g?
- Bussani
- · Replies 12 ·
Undergrad Questioning the Physics of a Hypothetical Cord
- 01001101
- · Replies 2 ·
Graduate Why does the Lorentz transformation split time and space changes equally?
- ZirkMan
- · Replies 4 ·
Graduate Existence of solutions to Einstein's equation
- causalset
- · Replies 2 ·
Graduate Is physics plain classical and Relativity an illusion?
- Gerenuk
- · Replies 21 ·
Graduate Can We Really Predict the Future by Exceeding the Speed of Light?
- glennpagano
- · Replies 30 ·
Graduate The Collision Clock Experiment
- calebhoilday
- · Replies 20 ·
Graduate Switch paradox and relativity of simultaneity
- calebhoilday
- · Replies 20 ·
Graduate Schwarzschild solution without matter
- paweld
- · Replies 4 ·
Graduate Relative velocity and work done
- werunom
- · Replies 7 ·
Undergrad Does length contraction affect light travel time along a moving ship?
- rede96
- · Replies 11 ·
Graduate What Causes Time Dilation Between Two Objects?
- Z-one
- · Replies 1 ·
Undergrad Can a Light Spot Go Faster than c?
- Dr Lots-o'watts
- · Replies 1 ·
High School How Can We Truly Measure the Speed of Light?
- JasonWuzHear
- · Replies 5 ·
Graduate Is One-Form Multiplication Commutative?
- schwarzschild
- · Replies 1 ·
Graduate How is the Minkowski 4-space equation connected to hyperbolic functions?
- stevmg
- · Replies 68 ·
Graduate The mass of an object warps/bends/disturbs spacetime. But does the
- PeterShaw
- · Replies 5 ·
Graduate Making sure events are simultaneous in S'
- Shaybay92
- · Replies 3 ·