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 Can We Explain the Cosmological Constant as a Tensorial Concept?
- jk22
- · Replies 12 ·
Undergrad Lorentz Transform Deduction: Question Explained
- thaiqi
- · Replies 6 ·
Undergrad Why does time dilation only affect one of the twins?
- ersa17
- · Replies 32 ·
Graduate Help on some equations in Einstein's original papers
- Pyter
- · Replies 59 ·
Graduate Another action for the relativistic particle
- Heidi
- · Replies 12 ·
Graduate What Are Null Basis Vectors and Metric Signatures in Kruskal Coordinates?
- George Keeling
- · Replies 8 ·
High School Why the stay-at-home twin is not considered to be accelerating?
- dayalanand roy
- · Replies 85 ·
Undergrad What does comoving mean and how is it related to isotropy?
- George Keeling
- · Replies 10 ·
Undergrad Derive Lorentz Transformation by Visualizing Space-Time Coordinates
- Ryder Rude
- · Replies 30 ·
High School Gravitational Field Representation: Why 1-Plane?
- roachth1
- · Replies 19 ·
Undergrad GR for a mathematician and a physicist? What's the difference?
- Matter_Matters
- · Replies 5 ·
Undergrad Does de Sitter Spacetime Have Flat Foliation?
- andrewkirk
- · Replies 4 ·
Undergrad Einstein vs Newton: The concept of inertial vs non inertial frames
- Aeronautic Freek
- · Replies 72 ·
Graduate Thought Exp: Transform Laws & Feedback Needed
- pervect
- · Replies 7 ·
High School Black Holes & Light: Questions from an Average Joe
- Shabumi
- · Replies 7 ·
Undergrad Create Black Holes with Warping EM Fields: Feasible?
- Ascendant78
- · Replies 17 ·
Undergrad Detonator Paradox" Re-Cast: Can a Thin Wire Prevent a Bomb?
- jonspalding
- · Replies 9 ·
High School General Relativity & External Forces: 2 Cases Examined
- Bob Walance
- · Replies 23 ·
Undergrad Solve Constant Acceleration Problem in Special Relativity
- Albertgauss
- · Replies 10 ·
High School Is the Doppler Effect Formula Different for Sources in Different Regions?
- etotheipi
- · Replies 12 ·
Undergrad How Do Jacobi Fields Explain Tidal Forces in General Relativity?
- lavinia
- · Replies 2 ·
Undergrad Argument for Existence of Normal Coordinates at a Point
- tomdodd4598
- · Replies 2 ·
High School Leave the science to Scientists. Just tell me what is SR.
- P J Strydom
- · Replies 29 ·
Undergrad Is a Merry Go Round Floating in Space an Inertial Frame of Reference?
- aademarco
- · Replies 12 ·
Undergrad Mass Unit in General Relativity
- Hornbein
- · Replies 4 ·
High School Time dilation and the reference frame of the vacuum
- danb
- · Replies 17 ·
Graduate Curved spaces that locally aren't flat
- MathematicalPhysicist
- · Replies 55 ·
Undergrad Dark energy questioning Relativity?
- PhysicalAardvark
- · Replies 29 ·
Undergrad Metric Tensor: Symmetry & Other Constraints
- quickAndLucky
- · Replies 10 ·
High School Topology on flat space when a manifold is locally homeomorphic to it
- Shirish
- · Replies 25 ·
Undergrad Effective Potential & Curved Spacetime: Angular Momentum Effects
- sqljunkey
- · Replies 13 ·
High School Is There a Connection Between Planck Length and Planck Time in Relativity?
- roineust
- · Replies 40 ·
Graduate How to Read Geodesic Equation: Vector, 3-D & EFE Solutions
- jk22
- · Replies 11 ·
High School Can an Object Exceed the Speed of Light?
- isotope493
- · Replies 12 ·
High School Symmetry in Higher Dimensions: Sean Carroll's Video & Physics
- Shirish
- · Replies 7 ·
High School Does time dilation work in 1d space?
- YouAreAwesome
- · Replies 42 ·
Undergrad Questions about spaghettification and gas cloud G2
- George Keeling
- · Replies 24 ·
High School How Does Gravity Affect Spring Stretching in Einstein's Theory?
- Dr_Mike_J
- · Replies 103 ·
Graduate Gravitational Energy: Field x Moment
- jaumzaum
- · Replies 4 ·
Undergrad What is the nature of space and time in deep empty regions of the cosmos?
- Satyam
- · Replies 48 ·
High School Time Dilation b/w Galaxies: Dark Matter Impact?
- AndrewDes
- · Replies 12 ·
Undergrad Computing Riemann Tensor: 18 Predicted Non-Trivial Terms
- JD_PM
- · Replies 1 ·
Graduate Double Dual of Vector Space: Is V** Always Same as V?
- Phinrich
- · Replies 14 ·
High School Difference Between Redshifts of Massive Galaxies & Accelerating Galaxies
- sqljunkey
- · Replies 3 ·
Undergrad Length Contraction: Traveling in a Space Ship
- Flying_Dutchman
- · Replies 4 ·
High School Components of Tangent Space Vector on Parametrized Curve
- Shirish
- · Replies 20 ·
High School Time traveling in the future and in the past
- Delta2
- · Replies 23 ·
High School On the level of detail required for GR math
- Shirish
- · Replies 18 ·
Graduate GR Unphysical Aspects: Time Protection Hypothesis & Riemannian Curvature
- jk22
- · Replies 3 ·
High School Gravitational Mass of C/2 Objects: Jim Adrian's Inquiry
- jamesadrian
- · Replies 3 ·
High School Explore Time Perception & Relativity - Get Your Answers Here
- Hyotopii
- · Replies 15 ·
Undergrad Vanishing of Contraction with Metric Tensor
- kent davidge
- · Replies 4 ·
High School How Do Lorentz Transformations Explain Time Dilation in Special Relativity?
- P J Strydom
- · Replies 13 ·
Graduate Unlearning Block Universe: BU vs Presentism Q&A
- GrayGhost
- · Replies 7 ·
Undergrad Static Point in de Sitter-Schwarzschild Spacetime
- timmdeeg
- · Replies 4 ·
Undergrad Metric defined with a non-coordinate basis
- Jianbing_Shao
- · Replies 28 ·
High School Can time pass slower on another planet, causing the Twin Paradox?
- Satyam
- · Replies 43 ·
High School Backwards Time Travel: Can We Influence Our Casual Past?
- MikeeMiracle
- · Replies 19 ·
Undergrad Gravitational Wave Creation: Is a Stationary Wave Possible?
- pelinkovac
- · Replies 12 ·
High School Calculating Relativity of Simultaneity
- billllib
- · Replies 13 ·
Undergrad The Non Constant Gravitational Constant (G)?
- Paul Stowe
- · Replies 2 ·
Graduate Kerr Black Hole Angular Momentum Limit
- exmarine
- · Replies 1 ·
High School Time Dilation & Relativity: Explained for Beginners
- Mattv
- · Replies 10 ·
Undergrad Proper Velocity: Intro to Elementary Particles
- hagopbul
- · Replies 4 ·
Undergrad Lorentz Invariance Violation for Manifolds
- sqljunkey
- · Replies 3 ·
Undergrad What Happens to Laser Light Inside a Spaceship Traveling at Light Speed?
- IamVector
- · Replies 15 ·
Undergrad Differential form of the velocity equation in a non-standard configuration
- Shirish
- · Replies 6 ·
High School How does an isolated observer know if they're accelerating?
- Shirish
- · Replies 84 ·
High School Gravitational Lensing & MOND: Does DM Explain Observations?
- exmarine
- · Replies 1 ·
High School Length contraction and Time dilation calculation
- P J Strydom
- · Replies 27 ·
Graduate Can you numerically calculate the stress-energy tensor from the metric?
- quickAndLucky
- · Replies 4 ·
High School Matter & Space-Time: A Discussion
- Immortal68
- · Replies 2 ·
Undergrad Four Velocity Vector: why divide by time according to the particle?
- dkhurana
- · Replies 28 ·
Undergrad Zero-Energy Universe: Reliable Source?
- nomadreid
- · Replies 7 ·
Undergrad Treatment of Relativity in "Las Leyes de la Termodinámica" Movie
- Nantes
- · Replies 9 ·
High School What Would You Experience Inside a Black Hole and How Does Time Behave?
- bosydomo
- · Replies 16 ·
High School Does Gravity Act on Everything? Fundamental to GR?
- Shirish
- · Replies 8 ·
Undergrad Falling EM system contradicts the equivalence principle?
- jcap
- · Replies 8 ·
Undergrad Understanding Microcausality in QFT
- JD_PM
- · Replies 16 ·
Undergrad Is x Equal to x' and t Equal to t' in Lorentz Transformations?
- Nagisa Kawahara
- · Replies 6 ·
Undergrad Rotation and Boost of Tensor Components: Meaning?
- kent davidge
- · Replies 4 ·
Undergrad The proper Schwarzschild radial distance between two spherical shells
- Buzz Bloom
- · Replies 45 ·
High School How the role of Mass is justified for below cases? (Earth/Moon, Jupiter/Io)
- rajen0201
- · Replies 43 ·
High School Query about Pound-Rebka like experiment
- etotheipi
- · Replies 8 ·
High School Could Asteroid Strikes Affect Mercury's Perihelion Advance?
- rajen0201
- · Replies 12 ·
Undergrad Can We Practically Measure the Gravitomagnetic Effect with Spinning Cylinders?
- olgerm
- · Replies 66 ·
Undergrad Question re spacial curvature K(r) w/r/t the Shwarzchild metric
- Buzz Bloom
- · Replies 42 ·
Undergrad Understanding how to derive the relativistic-relative velocity formula
- JD_PM
- · Replies 12 ·
Undergrad Parallel transport vs Lie dragging along a Killing vector field
- cianfa72
- · Replies 20 ·
High School Accelerate Light-Clock Simulation: Proper Time & Coordinate Time
- jartsa
- · Replies 27 ·
Undergrad Hyperbolic Geom of Minkowski Space: Chung et al. 2009
- nomadreid
- · Replies 6 ·
Graduate How Does Visser Derive Schwarzschild Geometry from Minkowski Space?
- Demystifier
- · Replies 22 ·
Undergrad Transformations of Electromagnetic Fields: Griffiths' Claims
- sophiatev
- · Replies 3 ·
High School Descending a Rotating Black Hole: Hit the Ring Singularity?
- MikeeMiracle
- · Replies 18 ·
High School Why is "time orthogonal to space" in inertial reference frames?
- Shirish
- · Replies 69 ·
Graduate Solving Jackson's 3rd Ed. Equations Involving A, L and g
- anbhadane
- · Replies 8 ·
High School Can Universe Be Decelerating in Time?
- VarnaiKristof
- · Replies 4 ·
Graduate Curvature Tensor for Dual Vectors
- Phinrich
- · Replies 26 ·
High School Descending a Black Hole: Spaghettification or Compression?
- Jiyong Chung
- · Replies 13 ·
Undergrad Lorentz transformation of the "bilinear spinor matrixelement"
- Garlic
- · Replies 7 ·