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 Is Clock Synchronization Throughout a Time-Like Congruence Transitive?
- WannabeNewton
- · Replies 4 ·
Graduate Incorporation of special relativity into general relativity
- nigelscott
- · Replies 27 ·
Graduate Curvature of Spacetime and its Impact on the Speed of Light
- Arjun Kumar
- · Replies 12 ·
Graduate Special relativity, light direction and wave source.
- Banana Joe
- · Replies 40 ·
Graduate Does Time Slow Down for Objects Falling into a Black Hole at the Event Horizon?
- dyb
- · Replies 11 ·
Graduate Defining negative energy of gravitational field
- Herbascious J
- · Replies 13 ·
Graduate Most proper time in Schwarzchild metric
- stallm
- · Replies 10 ·
Undergrad What Happens to Mass as it Approaches the Speed of Light?
- teetar
- · Replies 9 ·
Graduate Is there a known parametrization for time dilation in the FLRW metric?
- Vincentius
- · Replies 36 ·
Graduate Twin paradox without acceleration - A different question
- rede96
- · Replies 14 ·
Graduate Understanding Euclidean Group E(n) Elements
- ChrisVer
- · Replies 4 ·
Graduate Sign conventions in general relativity
- Nabigh R
- · Replies 7 ·
Graduate The Relativity of Motion: Is it Relative to the Object or the Rest Frame?
- analyst5
- · Replies 52 ·
Graduate About the Starship Titanic and joules/accelerations.
- blakean87
- · Replies 7 ·
Undergrad Gravitational pull on an object
- revo74
- · Replies 1 ·
Graduate Tensors in GR and in mechanics
- TrickyDicky
- · Replies 38 ·
Graduate Orbit eq. holds inside BH? - MTW sec. 25
- Jorrie
- · Replies 6 ·
Graduate Why does gravity cause acceleration in modern physics?
- Brady Campbell
- · Replies 6 ·
Graduate Space-Time Warpage and Kinetic Energy
- sgolson
- · Replies 8 ·
Graduate Mass is not the cause of gravity?
- Brady Campbell
- · Replies 3 ·
Graduate Understanding the Twin Paradox: A Quick Question Answered
- analyst5
- · Replies 32 ·
Graduate How Does Relativistic Velocity Affect the Heat Capacity of an Ideal Gas?
- Sunfire
- · Replies 10 ·
Graduate Relativity and particle collision.
- Herbascious J
- · Replies 7 ·
Graduate If all space-time already 'exists' then
- DarkMatterHol
- · Replies 12 ·
Graduate Contravariant and Covariant Vectors
- kderakhshani
- · Replies 7 ·
Graduate Cosmological redshift as kinematical Doppler effect
- tom.stoer
- · Replies 13 ·
Undergrad Mass-Energy Conservation: E/m=c^2
- john951007
- · Replies 4 ·
Graduate Curvature of Space: What is it?
- rushikesh
- · Replies 24 ·
Undergrad Why no electric field from a current in a wire? Length contraction.
- maajdl
- · Replies 11 ·
Graduate Unraveling the Michelson-Moorley Experiment
- Paul77
- · Replies 3 ·
Graduate Twin paradox without accelerative frame.
- Trojan666ru
- · Replies 118 ·
Graduate Does Relativistic Motion Affect Time Perception on Moving Trains and Platforms?
- JVNY
- · Replies 31 ·
Graduate Tensor Densities: Coordinate Independent Definition
- dEdt
- · Replies 3 ·
Graduate What Would Happen w/ Infinite Light Box?
- MichaelJ
- · Replies 19 ·
Graduate Why don't black holes look like neutron stars to outside observer?
- apocope
- · Replies 4 ·
Graduate Are Killing Vectors the Key to Solving Complex Equations?
- TimeFall
- · Replies 3 ·
Graduate Do the distance between two objects contract in length contraction
- Trojan666ru
- · Replies 13 ·
Graduate Stress-energy tensor for a single photon
- salvador_dali
- · Replies 5 ·
Graduate On the nature of the infinite fall toward the EH
- rjbeery
- · Replies 546 ·
Undergrad Objects Moving Close to Light Speed: Mass Difference?
- Antigone
- · Replies 16 ·
High School Gravity Analogy: Why Does Moon Orbit Earth?
- oneamp
- · Replies 5 ·
Graduate Faster than the speed of light
- daDragon
- · Replies 18 ·
Graduate Can Warp Speed Violate Causality? The Debate Among Physicists
- Dhruva Patil
- · Replies 6 ·
Graduate Realistic black hole in Friedmann universe
- tom.stoer
- · Replies 18 ·
Graduate Proof for Closure of Vector Addition - Can You Help?
- dEdt
- · Replies 2 ·
Undergrad Question about Einstein's train thought experiment
- Incognito310
- · Replies 20 ·
Graduate Confusion about special relativity
- MostlyHarmless
- · Replies 13 ·
Undergrad A couple basic spacetime questions.
- Mhorton91
- · Replies 5 ·
Graduate Implications of constant speed of light in all inertial frames
- Commando Spaz
- · Replies 12 ·
Graduate General Relativity: Contracting Indices
- direct99
- · Replies 5 ·
Graduate Unveiling the Formation of Black Holes: A Relativity Perspective
- yprager
- · Replies 6 ·
Undergrad What space contracts in Special Relativity?
- dubiousraves
- · Replies 62 ·
Graduate Finding inverse metric tensor when there are off-diagonal terms
- Nabigh R
- · Replies 4 ·
Graduate Tensor Rank vs Type: Explained
- ddesai
- · Replies 4 ·
Graduate Spacetime 'loaf' according to Fabric of the Cosmos
- Dannen
- · Replies 3 ·
Graduate Solving Confusion about Hans Ohanian's One-Dimensional Gas Example
- bcrowell
- · Replies 0 ·
Graduate JollyOlly's book 'A Roller Coaster Ride through Relativity'
- ghwellsjr
- · Replies 28 ·
Graduate Null Killing Vector & Conserved Quantity - Physics Forums
- pervect
- · Replies 3 ·
Graduate Tensors and General Relativity
- pierce15
- · Replies 6 ·
Graduate Unraveling Dirac's General Relativity Equation
- dEdt
- · Replies 3 ·
Graduate Transformation to local inertial frame
- Libra82
- · Replies 13 ·
Graduate Time Dilation: Current vs Massless Universe
- CzarBrent
- · Replies 1 ·
Undergrad To Saturn at (nearly) the speed of light
- Baggins101
- · Replies 64 ·
Graduate Point particle in scalar potential
- jostpuur
- · Replies 12 ·
Graduate 'Crossing' speed: Lemaitre vs. 'dropped' observer
- Jorrie
- · Replies 15 ·
Graduate Why does light not reach any distance instantly?
- chillpenguin
- · Replies 41 ·
Graduate Full Lagrangian for Electrodynamics: Find ##\mathcal{L}_\textrm{matter}##
- dEdt
- · Replies 2 ·
Graduate Open-Source Book on Special Relativity - Free Download
- bcrowell
- · Replies 2 ·
Graduate How Does 4-Acceleration Differ in General Relativity Versus Special Relativity?
- TrickyDicky
- · Replies 4 ·
Undergrad The universal gravitational constant (G)
- Yoni
- · Replies 2 ·
Graduate Stability of Closed Time-Like Curves: Current Status?
- ksy
- · Replies 4 ·
Graduate Why Can't We Apply Euler-Lagrange Directly to the Electromagnetic Lagrangian?
- dEdt
- · Replies 14 ·
Graduate Lagrangian density for continuous distribution of matter
- dEdt
- · Replies 10 ·
Graduate Is Weyl Curvature Present in Interior Spacetimes?
- Markus Hanke
- · Replies 4 ·
Graduate Does Time Dilation Occur for Both Twins in the Twin Paradox?
- stevmg
- · Replies 10 ·
Graduate Does the speed of light change with the age of the universe?
- vinven7
- · Replies 28 ·
Graduate Generel Relativity Force or Affect in Space Time
- Quarlep
- · Replies 1 ·
Graduate Why a constant determinant of the metric?
- Rob Sfic
- · Replies 17 ·
Graduate Quick & Short Question on General Relativity
- stevmg
- · Replies 2 ·
Graduate Can Empty Space Curve? FRW Cosmology Equations Explored
- copernicus1
- · Replies 5 ·
Graduate Conservations law or equations of motion, and other constrains
- sergiokapone
- · Replies 21 ·
Graduate Symmetrical motion and resolving differences in FoR
- coktail
- · Replies 34 ·
Graduate Differences in Presentation of Ordinary Partial Derivatives of Tensors
- mokrunka
- · Replies 3 ·
Graduate Maxwell's equations from divergence of stress-energy tensor?
- bcrowell
- · Replies 5 ·
Graduate What is the Lorentz invariance of flux in the stress-energy tensor?
- dEdt
- · Replies 10 ·
Graduate Is length contraction real or just a matter of perspective?
- JVNY
- · Replies 73 ·
Graduate Why does v = 0 in the Lorentz Transformation equation?
- xwolfhunter
- · Replies 3 ·
Graduate Metric in SR: \eta^{\alpha \beta}=\eta_{\alpha \beta}?
- dEdt
- · Replies 3 ·
Undergrad Can relativistic mechanics explain the concept of force?
- Quarlep
- · Replies 19 ·
Graduate Why Curved Space Affects Satellite Orbit: The Role of Newtonian Force
- devang2
- · Replies 6 ·
Graduate What is intuitevely the field part of GR equations?
- Quantum Immortal
- · Replies 7 ·
Graduate Direction of field line transforms like direction of a stick
- bcrowell
- · Replies 6 ·
Graduate Equivalence Principle: Paper on Internal Observer Effects
- ith
- · Replies 3 ·
Graduate How to determine extension of a pseudo-Riemannian manifold
- PAllen
- · Replies 2 ·
High School Why is E=mc² Essential in Understanding Energy and Mass?
- thykingdombutt
- · Replies 10 ·
Graduate The Anthropomorphized Time Traveling Paradox.
- JPBenowitz
- · Replies 4 ·
Graduate How Does a Spinning Disc Appear at Near-Light Speeds?
- Oldfart
- · Replies 14 ·
Graduate Can an Odometer Measure Relativistic Distance?
- PAllen
- · Replies 53 ·
Graduate What is intuitively the source of the gravitational field?
- Quantum Immortal
- · Replies 28 ·
Graduate Camera on Spacecraft Moving Near Speed of Light
- JSGandora
- · Replies 2 ·