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 What happens when objects travel at the speed of light?
- asutosh
- · Replies 21 ·
Graduate The unit vector normal to the curvature of spacetime
- dimension10
- · Replies 8 ·
Graduate No Such Thing as the Plank Length?
- gordonj005
- · Replies 4 ·
Graduate Does Light Lose Energy and Change Frequency Due to Gravitational Waves?
- rahuljayanthb
- · Replies 3 ·
Graduate What Does It Mean to Be at Rest Relative to the CMB?
- cbetanco
- · Replies 6 ·
Graduate What Causes the Negative Sign in the Schwarzschild Metric Lagrangian?
- Identity
- · Replies 4 ·
Graduate Gravitational Time Dilation and Contradicting Physical Events
- timetravel_0
- · Replies 4 ·
Graduate Time dilatation and 'now slices'
- Ty1erC
- · Replies 3 ·
Graduate How does gravity travel faster than the speed of light in a gravitational field?
- Myslius
- · Replies 7 ·
Graduate What Happens When Both Objects Travel at c?
- Xilor
- · Replies 20 ·
Graduate Reaching the Rindler horizon in a finite proper time
- teeeeee
- · Replies 3 ·
Graduate Is the Distance Traveled by Light Affected by Time Dilation?
- cragar
- · Replies 2 ·
Graduate Charge Invariance & Mass Dependence: Lorentz Transformations
- QuArK21343
- · Replies 3 ·
Graduate Accelerated observors in flat space
- clerk
- · Replies 17 ·
Graduate Gravitational lensing and red shift
- jollett
- · Replies 4 ·
Undergrad Relativity: Impossible Scenario?
- JrAcey
- · Replies 4 ·
Graduate Solutions to the space-time metric
- Mazulu
- · Replies 5 ·
Graduate So gravity obviously is the differing rates of expansion of Matter vs
- Gomjabbar
- · Replies 21 ·
Undergrad Speed of light and time dilation
- ciprian
- · Replies 18 ·
Graduate The zeroth component of the four-momentum
- Identity
- · Replies 2 ·
Graduate Can a Black Hole Have Angular Momentum?
- Identity
- · Replies 6 ·
Graduate Pondering basis vectors and one forms
- Matterwave
- · Replies 5 ·
Graduate Is Absolute Zero Velocity Possible?
- string querry
- · Replies 24 ·
Graduate Elegant Universe: Example of motion's effect on space
- mark goldman
- · Replies 4 ·
Graduate What is the significance of square brackets in tensor notation?
- Identity
- · Replies 4 ·
Graduate Is general relativity generally covariant?
- Phrak
- · Replies 3 ·
Graduate What Should a Good Theory of Gravity Explain?
- Felian
- · Replies 25 ·
Graduate Could time as a dimension have property that would behave like energy ?
- R32GTR
- · Replies 9 ·
Graduate Relation between affine parameters
- Identity
- · Replies 1 ·
Graduate Formula of doppler effect for sound,relativistic?
- ShayanJ
- · Replies 17 ·
Graduate Time dilations: How do we actually see things?
- bill alsept
- · Replies 4 ·
Graduate Why can we explain gravity geometrically but not EM force?
- Ontophile
- · Replies 4 ·
Graduate Good resources for integrals in Four-Space?
- Master J
- · Replies 3 ·
Graduate Special relativity under the inflation of spacetime
- junglebeast
- · Replies 7 ·
Graduate What Makes Photons, Bosons, and Gluons Massless?
- khil_phys
- · Replies 6 ·
Graduate Is the Lense-Thirring effect evidence for Mach's principle?
- Matterwave
- · Replies 14 ·
Graduate Thought Experiment on the speed of light
- baseball
- · Replies 5 ·
Graduate Explaining the Grand Design: Time & Change without Time
- junglebeast
- · Replies 31 ·
Graduate Can Energy Really Exist on the Surface of a Black Hole?
- Rlam90
- · Replies 49 ·
Graduate Table of Connection Coefficients
- glamotte7
- · Replies 6 ·
Graduate Varying Gravitational Field - Invariant Tetrahedron?
- Master J
- · Replies 2 ·
Graduate Downloading e-books makes Kindle heavier?
- Kkamann
- · Replies 2 ·
Graduate Debunking the Myth: The Truth About Black Holes and Accelerated Particles
- rmshepherd
- · Replies 1 ·
Graduate Question about FTL travel vs. FTL acceleration
- JoshWilliard
- · Replies 2 ·
Graduate Can special relativity result in alternative realities?
- junglebeast
- · Replies 3 ·
Graduate Visual effects of SR versus GR
- TGlad
- · Replies 5 ·
Graduate What does it mean to move through time?
- goodabouthood
- · Replies 19 ·
Graduate Gravity Effects on Rod Length - Reference Sources
- SinghRP
- · Replies 52 ·
Undergrad Needing a basic clarification with SR
- jam.muskopf
- · Replies 5 ·
Graduate Solving Problems with Tensor in 2+1 Dimensions
- creepypasta13
- · Replies 7 ·
Undergrad Einstein's relativity proves caloric theory?
- Hobold
- · Replies 2 ·
Graduate Explaining Mass Increase Outside of Relativity: The Role of Internal Resistance
- trglo
- · Replies 5 ·
Graduate Twin paradox: who decided who is the younger one
- Passiday
- · Replies 62 ·
Graduate Time Dilation and Length Contraction near the Event Horizon of a BH
- Constantin
- · Replies 33 ·
Graduate I require the assistance of a physicist.
- Eiri
- · Replies 14 ·
High School Breaking Light: Can You Outrun the Speed of Light?
- Doguso
- · Replies 5 ·
Graduate Comparing Gravity in Newtonian and Relativistic Frameworks
- John15
- · Replies 5 ·
Graduate Relativity Theory: Connecting Gravitational & Velocity Time Dilation
- Shaw
- · Replies 2 ·
Graduate Wgat would a light clock measure in free fall?
- nitsuj
- · Replies 11 ·
Graduate What energy term determines gravity in GR?
- kmarinas86
- · Replies 7 ·
Graduate Momentarily Comoving Reference Frame
- Rasalhague
- · Replies 4 ·
Graduate Gamma5 x d^2 Lorentz invariant?
- cbetanco
- · Replies 3 ·
Graduate Coordinate change to remove asymptotic geodesic?
- ck99
- · Replies 2 ·
Graduate Alternative way to calculate the special relativistic time dilation factor
- Alexroma
- · Replies 28 ·
Graduate Galilean Transformation Limitations: Explained w/ Example
- Zaidymohd
- · Replies 2 ·
Graduate Problem Landau relativity special
- nulliusinverb
- · Replies 3 ·
Graduate What is the need for KK-theories (and similar)
- Matterwave
- · Replies 3 ·
Graduate Geometric representation of two-forms.
- AuraCrystal
- · Replies 9 ·
Graduate Observing Light Flash from 0.9999c Moving Body
- nitsuj
- · Replies 5 ·
Graduate Questioning speed of light and infinite mass
- btgream
- · Replies 9 ·
Graduate Inertial frame of reference of light speed (And beyond)
- Eric B
- · Replies 12 ·
Graduate GPS & Relativity: Position Error Lower Than 38000 Feet?
- Suxxor
- · Replies 60 ·
Graduate Question about viewpoints in relativity
- georgiehutch
- · Replies 6 ·
Graduate Time dilation and relative velocity
- DaveC426913
- · Replies 19 ·
Graduate Symmetry assumption in derivation of SR
- zonde
- · Replies 9 ·
Graduate Is this a legitimate derivation of the changing of mass?
- nhmllr
- · Replies 2 ·
Graduate On the Reissner-Nordstrom Metric
- Anamitra
- · Replies 22 ·
Graduate Family of nested spheres in Schwarzschild spacetime
- PeterDonis
- · Replies 1 ·
High School Real life examples of simultaneity
- goodabouthood
- · Replies 115 ·
Graduate Mass-less particles? How can that be?
- narrator
- · Replies 30 ·
Graduate How does SR apply to rotating bodies?
- mrspeedybob
- · Replies 5 ·
Graduate I don't understnad how to get the 4-volume element for a Minkowksi space
- Lyalpha
- · Replies 4 ·
Graduate Spinning mass & spatial distortion
- Diracs Dad
- · Replies 2 ·
Graduate Einstein Field equations for dummies
- alecrimi
- · Replies 2 ·
Graduate Spinning Mass & Spatial distortion
- Diracs Dad
- · Replies 3 ·
Graduate Photon, Lagrange Point, Binary Black Hole
- Edward Solomo
- · Replies 7 ·
Graduate Lorentz Transformations and Photon Delay
- expwnent
- · Replies 6 ·
Graduate Is there a spacetime which is timelike and spacelike complete but null
- martinbn
- · Replies 2 ·
Graduate Speed of light measurements using different light source.
- Dilema
- · Replies 6 ·
Graduate Can Moving a Hydrogen Atom by an Angstrom Alter Its Mass?
- YummyFur
- · Replies 3 ·
Graduate What is the relativistic cause of planetary orbital rotation.
- YummyFur
- · Replies 16 ·
Graduate Which principle would be violated?
- StevieTNZ
- · Replies 2 ·
Graduate Understanding the Trace of the SEM Tensor
- jfy4
- · Replies 3 ·
Graduate Einstein holding Maxwell's equations above Newton's equations
- diagopod
- · Replies 26 ·
Graduate Could GPS satellites be used to detect gravitational waves?
- haael
- · Replies 2 ·
Graduate Equivalence principle and gravitational neutron diffraction
- luxxio
- · Replies 5 ·
Graduate Why Is the tt Component of the Metric Interpreted Differently in This Paper?
- vizart
- · Replies 1 ·
Graduate Perturbative Construction of General Relativity
- ApplePion
- · Replies 1 ·
High School Do not understand why 'c' is squared in Einstein's equation
- FlipUnderwood
- · Replies 7 ·
Graduate How Do Black Holes Form from Space-Time Curvature?
- Gravitonion
- · Replies 1 ·