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 What Would the Rocks Be Rotating With Respect To in Newton's Thought Experiment?
- chuckset
- · Replies 2 ·
Graduate About the mass-energy relation
- snoopies622
- · Replies 3 ·
Undergrad Does Mass disappear and become Energy?
- Phrak
- · Replies 20 ·
Graduate What Einstein meant when he termed something a 'mollusc'
- Bradenbraden
- · Replies 2 ·
Graduate Relativistic length expansion in general accelerated system
- J.F.
- · Replies 1 ·
Graduate Timelike Geodesic: Proving c^2 from $\ddot x^{\mu}$
- barnflakes
- · Replies 4 ·
Graduate 3 dimensions of space and 1 of time
- Hoku
- · Replies 171 ·
Graduate Resolve Universal Expansion: Can We Measure It in the Lab?
- JollyOlly
- · Replies 37 ·
Graduate Is the cosmological constant constant?
- JollyOlly
- · Replies 11 ·
Graduate Light speed in a non Inertial frame of reference
- Philip_Hu
- · Replies 9 ·
High School Is time runs faster at the top of a building or at the bottom ?
- Marwan_Ahmed
- · Replies 12 ·
Graduate What happens after you travel at a relativistic speed
- gsingh2011
- · Replies 15 ·
Graduate Null geodesic in 2 dimensional manifold
- paweld
- · Replies 2 ·
Graduate Why is the Equivalence Principle True?
- ia_
- · Replies 18 ·
Graduate Length contraction, hubble constant, and C
- brainstorm
- · Replies 5 ·
Graduate Christoffel Symbols: Intuitive Proof for Covariant Derivative of Metric Tensor
- zwoodrow
- · Replies 4 ·
Graduate If a photon had a mass, time travels would be possible
- jumpjack
- · Replies 44 ·
Graduate Can the Minkowski Line Equation Explain Time Dilation in Special Relativity?
- Cakey
- · Replies 4 ·
Graduate Zwartschild radius of black hole link between matter and energy?
- brainstorm
- · Replies 4 ·
Graduate Understanding the Relationship between Connection and Metric in Curved Spacetime
- gnieddu
- · Replies 3 ·
Graduate About how light clocks would work
- Aaron_Shaw
- · Replies 6 ·
Graduate Photon's Mass and Speed of Light [Confused]
- Atran
- · Replies 2 ·
Graduate Decomposition of the wave-vector in terms of wavelength
- watty
- · Replies 1 ·
Graduate Breaking Causality: Physical Interpretation
- watty
- · Replies 1 ·
Graduate Question about Brian green book THE FABRIC OF THE COSMOS
- lnsanity
- · Replies 7 ·
Graduate Why is spacetime curved in GR?
- Insanity01
- · Replies 5 ·
Graduate Metrics on a manifold, gravity waves, gauge freedom
- Michael_1812
- · Replies 3 ·
Graduate Are Einstein and Minkowski's interpretations of special relativity different?
- matheinste
- · Replies 10 ·
Graduate Close to C orbit around Earth and how time would be affected
- kamikaze762
- · Replies 6 ·
Graduate Bullet vs Photon: speed of light, momentum and reference frames
- Dunnis
- · Replies 20 ·
According to GR, the future already exist?
- lookaround9
- · Replies 4 ·
Undergrad Can You Move Faster Than the Speed of Light on a Spaceship?
- Pineapple
- · Replies 2 ·
Graduate Maxwell eqs invariant under other transforms
- zwoodrow
- · Replies 12 ·
Graduate Why Would the TOV Equation Be Based on the Exterior Metric?
- Orion1
- · Replies 13 ·
Undergrad What is the difference? special&general
- phy_freak
- · Replies 5 ·
Undergrad Light clock moving to demonstrate time dilation
- RK1992
- · Replies 117 ·
Graduate Why is mass treated differently from charge in relativity?
- peeyush_ali
- · Replies 1 ·
Graduate Is There a Black Hole at the Center of the Sun?
- DiamondGeezer
- · Replies 21 ·
Graduate Applying variational principles to that metric describes a black hole
- physx_420
- · Replies 5 ·
Graduate Is spacetime an absolute reference frame?
- chuckset
- · Replies 10 ·
Graduate Is the speed of light constant, or could it vary with frequency?
- h1a8
- · Replies 5 ·
Graduate Inconsistency in relativity paper
- js1
- · Replies 10 ·
Graduate Question about the kinematic equation
- member 141513
- · Replies 1 ·
Graduate Why does the speed of light have a maximum speed?
- GeorgCantor
- · Replies 12 ·
Graduate What Does One Form Mean in Relativity Theory?
- Jomapil
- · Replies 4 ·
Graduate See Objects Fall into Schwarzschild Black Hole?
- paweld
- · Replies 1 ·
Graduate Pioneer anomaly not gravitational
- bcrowell
- · Replies 53 ·
Graduate Solving the Equation of Geodesic Deviation
- Altabeh
- · Replies 1 ·
Graduate What are the exotic shapes of black holes beyond 4 dimensions?
- bcrowell
- · Replies 3 ·
Graduate Understanding Tidal Forces & Rindler Metric
- snoopies622
- · Replies 70 ·
Graduate Is the Force of Gravity Affected by Relativistic Velocities in Orbital Motion?
- h1a8
- · Replies 11 ·
Graduate Matter into energy at high velocity
- ripoli85
- · Replies 3 ·
Graduate Relativistic asteroid collision
- superpaul3000
- · Replies 9 ·
Graduate What are the shortcomings of Misner, Thorne, Wheeler?
- pellman
- · Replies 21 ·
Graduate About the Rindler metric and the Weyl tensor
- snoopies622
- · Replies 11 ·
Graduate How Do the Gauges of 1PN and Schwarzschild Metrics Differ?
- andert
- · Replies 2 ·
Graduate Is Proper Time in Relativity an Invariant Quantity?
- Grimble
- · Replies 12 ·
Graduate Confused about derivatives of the metric
- quasar_4
- · Replies 1 ·
Graduate Where can I find a list of Christoffel Symbols for Various Metrics?
- Chaosmarch
- · Replies 4 ·
Graduate Relationship btwn Killing Vectors and Geodesics
- bravelittlemu
- · Replies 1 ·
Graduate Einstein Field Equation Solution - How?
- physics.alex
- · Replies 13 ·
Graduate Einstein's Hypotenuse: Unraveling the Mystery of Minus Signs
- epmc2
- · Replies 1 ·
Graduate Is Periodicity Preserved in Relativistic Phenomena?
- Eynstone
- · Replies 1 ·
Graduate Lagrangian/Hamiltonian for classical point particles in SR
- Fredrik
- · Replies 3 ·
Graduate Physical intuition behind geodesics and parallel transport
- quasar_4
- · Replies 4 ·
Undergrad Density Formula for Moving Particles
- FeDeX_LaTeX
- · Replies 4 ·
Graduate What are the unanswered questions about Hawking radiation and the Unruh effect?
- karlzr
- · Replies 41 ·
Graduate Shape of Spacetime: Curvature Tensor or Metric?
- jfy4
- · Replies 1 ·
Graduate Relativity paradox in exponentially accelerating train
- kochanskij
- · Replies 1 ·
Undergrad Is Time Multi-Dimensional Like Space?
- xem_007
- · Replies 7 ·
Graduate Earth pulls with the same amount of gravity on every one
- clm321
- · Replies 1 ·
Graduate Why Does an Electron Not Gain Mass Moving Near the Speed of Light?
- FizixFreak
- · Replies 18 ·
Graduate Gravity Concept: Is it Wave or Geometry Blending?
- physics.alex
- · Replies 9 ·
300 Years of Gravitation, Updates?
- LouMazero
- · Replies 1 ·
Undergrad How is the Speed of Light Formula Derived and Why is it Squared?
- FeDeX_LaTeX
- · Replies 4 ·
Graduate Minkowski 4-space? Yes or No.
- stevmg
- · Replies 9 ·
Graduate Very close binary, strongest steady source of gravitational waves
- bcrowell
- · Replies 9 ·
Undergrad Why Did Einstein Use the Speed of Light in E=mc²?
- alex.cordero
- · Replies 7 ·
Graduate Deriving Lorentz transformations from time dilation and length contraction
- JT7
- · Replies 6 ·
Undergrad How do we determine one clock is better?
- pellman
- · Replies 4 ·
Graduate Time it will take when traveling at speed of light
- Norzog
- · Replies 27 ·
Undergrad Getting close to Speed of light
- Desiree
- · Replies 7 ·
Graduate What happens biologically during time dilation?
- danielatha4
- · Replies 41 ·
Graduate The Anisotropic World" - Educational Film by Sklyarov & Pavlov
- Mikhail88
- · Replies 1 ·
Graduate Einstein's Train: Questions on Length, Velocity, & Time Difference
- stevmg
- · Replies 7 ·
Graduate Question about Einsteins theory of relativity
- emcc22
- · Replies 22 ·
Graduate Can the big bang occur without time?
- tanzanos
- · Replies 4 ·
Graduate Is EM theory in curved spacetime the same as unification ?
- pellman
- · Replies 13 ·
Undergrad Why the pythagoras theorem is used in the second equation?
- Atran
- · Replies 1 ·
Graduate Action for the relativistic point particle
- bankcheggit6
- · Replies 1 ·
Graduate Yet another doppler question (regarding conservation, time, and irradiance)
- ssope
- · Replies 25 ·
Graduate BRS: Subgroup lattice of a Permutation Group via GAP
- Chris Hillman
- · Replies 1 ·
Graduate Is Simultaneity Absolute in the Context of Relativity?
- samerking
- · Replies 10 ·
Graduate Gravity and Instantaneous Information sharing
- camleot
- · Replies 11 ·
Graduate Sagnac Effect and Special Relativity
- KingNothing
- · Replies 8 ·
Graduate I Still Don't Get General Relativity
- iluvphysics
- · Replies 16 ·
Graduate Can Relative Velocities Exceed the Speed of Light?
- cbd1
- · Replies 3 ·
Graduate Do Objects Become Heavier When Spinning at High Speeds?
- lnsanity
- · Replies 16 ·
Graduate Light ray paths near schwarzschild blackhole
- nocks
- · Replies 32 ·
Undergrad Red or Blue Shift: Moving Light Sources Forward/Backward
- lnsanity
- · Replies 6 ·