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 Why Does the Angle Between Coordinate Axes in Different Frames Equal atan(v/c)?
- olgerm
- · Replies 66 ·
Undergrad Position of Particle in Special Relativity (A vs B)
- adosar
- · Replies 7 ·
High School Julius Caesar Problem from a SpaceTime Physics book
- NoahsArk
- · Replies 50 ·
Undergrad Can we increase an object's gravitational force by adding energy?
- jms4
- · Replies 23 ·
Undergrad Pullback of Vector Field in Relativity: Restrictions?
- Pencilvester
- · Replies 2 ·
Graduate Derive Radial Momentum Eq. in Kerr Geometry
- abby11
- · Replies 1 ·
Undergrad Appearance of a Kerr black hole from above
- Creedence
- · Replies 20 ·
High School What happens to speed and velocity in a rotating frame of reference?
- somega
- · Replies 29 ·
High School Reference frame symmetry in Special Relativity
- x-vision
- · Replies 35 ·
Undergrad Energy Momentum Tensor Prerequisites: What Do I Need to Know?
- kent davidge
- · Replies 5 ·
Undergrad Mechanical system with de Broglie-like features
- AVentura
- · Replies 25 ·
Graduate Relativistic Hoop w/ Constant Circumference: Solving Egan's Results
- pervect
- · Replies 5 ·
Undergrad Special relativity question driving me crazy....
- Newton-reborn
- · Replies 5 ·
High School Where did the 1/2 go in E=mc^2?
- DaveC426913
- · Replies 124 ·
High School Is Gravity Really a Force Like the Other Fundamental Forces?
- Happiness
- · Replies 12 ·
High School Proof of Specific Covariant Divergence
- gerald V
- · Replies 2 ·
High School Special Theory of Relativity: Ques on Thought Experiment
- Visair1
- · Replies 5 ·
High School Question about the rest frame of a photon
- member 342489
- · Replies 6 ·
Graduate Applying General Lorentz Boost to Multipartite Quantum State
- Emil_M
- · Replies 2 ·
Undergrad Is Relativity a Complete Theory? Investigating Math Formulation
- kent davidge
- · Replies 6 ·
Undergrad Relativistic Energy of Rotating Thin Ring: Quick Qs
- AVentura
- · Replies 13 ·
Graduate Why does MTW keep calling the "product rule" the "chain rule"?
- FreeThinking
- · Replies 42 ·
Graduate Derivation of the Vacuum Einstein Equations: Understanding ln det g = 1
- PGaccount
- · Replies 8 ·
Undergrad Problems with Einstein's 1920 "Relativity"
- bengoodspeed
- · Replies 58 ·
Undergrad Is the Lorentz Boost Speed Nontrivially Related to Galilean Speed?
- jk22
- · Replies 10 ·
High School But in reality, time isn't relative at all, right?
- GuillemVS
- · Replies 20 ·
Graduate Issue with the definition of a Lie derivative and its components (Carroll's GR)
- haushofer
- · Replies 14 ·
Undergrad How does gravity affect time on different planets?
- EasterEggs123
- · Replies 4 ·
Undergrad Succeed in Learning Relativity: Transport, Frames, Tensors
- kent davidge
- · Replies 9 ·
Undergrad How do you derive those basis vectors in GR?
- space-time
- · Replies 14 ·
Undergrad Communication with Rindler Observer: Is It Possible?
- kent davidge
- · Replies 17 ·
Undergrad Relativity of Simultaneity: What Einstein's Contribution Was
- e.chaniotakis
- · Replies 4 ·
Undergrad Okay, what exactly makes a timelike curve closed?
- space-time
- · Replies 18 ·
Undergrad Three dimensional tracefree tensor?
- Pencilvester
- · Replies 4 ·
High School Universe Becoming a Black Hole: What Would It Look Like?
- black hole 123
- · Replies 15 ·
Undergrad On the Relativity of Lengths and Times
- pheurton
- · Replies 14 ·
Undergrad Applying the spacetime interval to regular vectors instead of curves
- space-time
- · Replies 2 ·
High School Can a rod survive dipping into a supermassive black hole's event horizon?
- black hole 123
- · Replies 9 ·
Graduate Einstein, Mach's Principle, and the Speed of Light Limit
- e2m2a
- · Replies 28 ·
Undergrad Velocity u > c? Faster Than Light Comm?
- f todd baker
- · Replies 7 ·
Graduate Only Three People Understand General Relativity
- bhobba
- · Replies 24 ·
Undergrad Proper (and coordinate) times re the Twin paradox
- Grimble
- · Replies 330 ·
Undergrad Duration of a round-trip to Alpha Centauri
- Warp
- · Replies 21 ·
Undergrad Locally Cartesian Coordinates on the Sphere
- kent davidge
- · Replies 10 ·
High School Dark Matter -- Could dark matter be standard matter from the past?
- ryanbeem
- · Replies 14 ·
Undergrad Gravity: Empty Universe & 2 Apples 10B Light Years Apart
- zuz
- · Replies 24 ·
Graduate Can Time Travel Teleportation Be Achieved with Computer Bytes and Radio Signals?
- AIO
- · Replies 2 ·
Graduate When and Why Was the Definition of the Meter Changed?
- pervect
- · Replies 101 ·
Undergrad Understanding Boosts in Misner Space: Where Do They Come From?
- space-time
- · Replies 6 ·
High School Difficulty with derivatives using the Lorentz transformations
- etotheipi
- · Replies 10 ·
High School Does Local Gravity Override Dark Matter in Galactic Rotation?
- Viopia
- · Replies 35 ·
Undergrad Lorentz Transformations: Linearity & Best Argument
- kent davidge
- · Replies 5 ·
Graduate Time Dilation in Gravitational Fields: Are Equivalent Formulas?
- Emmacastellano80
- · Replies 2 ·
High School Lightyear Distance: Understand Its Impact
- Mickeydee
- · Replies 9 ·
Undergrad Apply Conservation Law to Euler-Lagrange Equation
- space-time
- · Replies 4 ·
Undergrad Light Cone in Rindler Coordinates: Visualization & Reasoning
- kent davidge
- · Replies 6 ·
Undergrad Headlight Effect of Moving Light Source: Formula
- Hiero
- · Replies 3 ·
High School Physics near the event horizon
- Staticboson
- · Replies 39 ·
Undergrad Learn About Conservation Law & Geodesic Equation
- space-time
- · Replies 10 ·
Undergrad Shouldn't a moving clock appear to be ticking faster instead of slower?
- Mentospech
- · Replies 71 ·
Undergrad Rindler Coordinates & Quadrants: Resolving an Issue
- kent davidge
- · Replies 4 ·
High School Is Gravity Truly a Force According to Relativity?
- kfielder
- · Replies 29 ·
Undergrad Solving Geodesic Equations with Godel Metric
- space-time
- · Replies 4 ·
Undergrad Is this the only form of the Minkowski metric?
- kent davidge
- · Replies 34 ·
Undergrad Curved Space-Time: Understanding How Nothing Has Shape
- bcl
- · Replies 29 ·
High School Finding the length of a metre stick from a moving frame of reference
- etotheipi
- · Replies 9 ·
Undergrad Visualizing Intrinsic Curvature: Is This a Good Practise?
- MatthijsRog
- · Replies 6 ·
Undergrad Bernard Schutz Proves Invariance of Interval
- kmm
- · Replies 6 ·
Undergrad What Makes Closed Timelike Curves Physically Possible in Godel Universes?
- space-time
- · Replies 7 ·
High School Is Time a Real and Material Concept?
- thinkandmull
- · Replies 16 ·
High School Deriving Lorentz Transformation: Wave Eq Invariance & General Relativity
- jk22
- · Replies 1 ·
High School Possibility of Black Hole research
- Marshall_Mathers
- · Replies 51 ·
Undergrad Extracting Info from a Black Hole: Robert's Hypothetical Process
- Creedence
- · Replies 11 ·
High School Time Dilation & Relative Motion: Who Measures Proper Time?
- adosar
- · Replies 13 ·
Graduate Critique of Non-Interaction Theorem: Meaning & Validity
- andresB
- · Replies 3 ·
Undergrad Is this a closed spacelike curve?
- space-time
- · Replies 5 ·
High School Finding Flaws in General Relativity: A Question of Knowledge
- cordless03
- · Replies 4 ·
Undergrad Metric Nomenclature: Lorentz & Minkowski
- kent davidge
- · Replies 5 ·
Undergrad What is the physical cause behind time dilation?
- Jazzyrohan
- · Replies 41 ·
Graduate Synchrotron Radiation: Charge Loss of Relativistic Particles in Magnetic Fields
- Alfredo Tifi
- · Replies 9 ·
High School Confusion over relative velocities and reference frames
- etotheipi
- · Replies 5 ·
Undergrad Does G effectively change in an expanding metric?
- jcap
- · Replies 15 ·
High School Simultaneity & Non-Invariant Variables: Is the Speed of Light Necessary?
- DeltaForce
- · Replies 3 ·
Graduate Does anyone know asymmetric dynamic global solutions to Einstein eqs?
- Heikki Tuuri
- · Replies 3 ·
High School Traveling backwards through time: clarification please
- MikeeMiracle
- · Replies 28 ·
Undergrad How can the stress tensor be non-zero where there is no matter?
- SamRoss
- · Replies 42 ·
High School Beginner Resources for Special & General Relativity
- DeltaForce
- · Replies 7 ·
Undergrad Calculate Time & Distance Dilations: 50k Years & 1 Day
- drkfuture
- · Replies 16 ·
Graduate Black Hole Eating Gravitational Waves - A Look at Physics
- .Scott
- · Replies 14 ·
High School Questions about Einstein and the Block Universe
- Quantum Alchemy
- · Replies 1 ·
High School Matter & Spacetime: How Tightly Coupled Are They?
- kfielder
- · Replies 16 ·
Undergrad Exact Stationary Spacetimes: Complete List of Discovered Solutions
- Creedence
- · Replies 8 ·
Undergrad Realistic Time Dilation for Objects > Subatomic Particles
- dsaun777
- · Replies 10 ·
Undergrad Is Special Relativity Creating a Paradox in Our Understanding of Time and Space?
- SpookyAction_
- · Replies 2 ·
Undergrad Faster Than Light Particle: Could it Create the Universe?
- Mike Downey
- · Replies 3 ·
High School Speed of Light: Michelson-Morley Experiment Revisited
- x-vision
- · Replies 9 ·
Undergrad Observers A & B: Rest & Simultaneity
- adosar
- · Replies 3 ·
Undergrad Usefulness of Diagrams for Relativity: 1-5
- kent davidge
- · Replies 7 ·
Undergrad Spacetime Geodesics at Sea Level & Zoomed Out
- bland
- · Replies 4 ·
Undergrad Relativistic centrifugal force
- Alan McIntire
- · Replies 59 ·