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 Triplet paradox: where's the error in my logic?
- gespex
- · Replies 18 ·
Graduate Does Relativistic Mass Change at the Speed of Light?
- jishitha
- · Replies 4 ·
Graduate How does the Twin Paradox demonstrate the effects of general relativity?
- PatrickPowers
- · Replies 2 ·
Graduate Twin Paradox Explanation Needed
- jam.muskopf
- · Replies 8 ·
Graduate Precession of the LRL Vector in SR
- utesfan100
- · Replies 2 ·
Graduate Different values for the inertia of a moving object?
- csmcmillion
- · Replies 5 ·
Graduate Going back in space vs Going back in time
- Shannon185
- · Replies 14 ·
Graduate Acceleration thought experiment
- Zula110100100
- · Replies 1 ·
Undergrad Why does light travel along a diagonal path in the Michelson-Morley experiment?
- Highwaydude
- · Replies 3 ·
Graduate Is SOL infinite? (from its own point of view)
- Lukas_23
- · Replies 12 ·
Undergrad Why does a rocket stop accelerating as it approaches light speed?
- mzntr
- · Replies 20 ·
Graduate What does someone on a train at light speed see?
- 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 Why can't massive objects traveling at c collide like slower objects?
- 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 Why is charge Lorentz invariant but mass is not?
- 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 Why are photons, bosons and gluons said to be massless if E=mc²?
- 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 How can inflation occur if time is spatial in the early universe?
- 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 Can a particle accelerated near light speed collapse into a black hole?
- rmshepherd
- · Replies 1 ·
Graduate Can a vessel move at light speed if acceleration is gradual?
- 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 Why can't objects reach the speed of light in some reference frame?
- 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 Does relativity predict a higher or lower gravitational force than Newton's law?
- John15
- · Replies 5 ·
Graduate Is there a connection between gravitational and 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 Limitation of the Galilean transformation with an 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 Why would GPS error be 38000 feet per day if relativity weren't compensated?
- Suxxor
- · Replies 60 ·
Graduate Why does the traveler see stationary time as slow if they age less?
- 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 Does a spinning mass warp spacetime differently than a non-rotating mass?
- Diracs Dad
- · Replies 2 ·
Graduate Einstein Field equations for dummies
- alecrimi
- · Replies 2 ·
Graduate Does a spinning mass distort spacetime differently than a stationary mass?
- 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 ·