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 Do nonlocality theorems contradict the local inertial frame principle?
- jk22
- · Replies 1 ·
High School Space is Relative: A 17 Yr Old's Exploration
- greg_rack
- · Replies 5 ·
Undergrad Why Geodetic Equation Doesn't Accept Schwarzschild Solutions
- jk22
- · Replies 27 ·
Undergrad Twin Paradox Explained: No Math Required
- Mark1980
- · Replies 21 ·
High School Does Removing Planets Affect the Sun's Energy?
- sqljunkey
- · Replies 28 ·
High School Time, Space, Fields, Spacetime & General Relativity
- Immortal68
- · Replies 3 ·
Undergrad Distinguishing gravity from fictitious forces
- Hiero
- · Replies 17 ·
Undergrad About inertial reference frames and logical deduction
- cianfa72
- · Replies 26 ·
High School How does gravity work beyond Newton's apple?
- timeuser84
- · Replies 5 ·
Undergrad Are there significant errors in my gravity presentation?
- sophiecentaur
- · Replies 11 ·
Undergrad Can We Explain the Cosmological Constant as a Tensorial Concept?
- jk22
- · Replies 12 ·
Undergrad Why does dx'/dt' give different results in Lorentz transform derivation?
- thaiqi
- · Replies 6 ·
Undergrad Why does time dilation only affect one of the twins?
- ersa17
- · Replies 32 ·
Graduate Einstein equations 47b and 66 in Die Grundlage der allgemeinen Relativitätstheorie
- Pyter
- · Replies 59 ·
Graduate Alternative Lagrangian for relativistic particle trajectories
- 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 Why is gravitational spacetime curvature shown in 2D diagrams?
- 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 Did Newton understand inertial and non-inertial frames before Einstein?
- Aeronautic Freek
- · Replies 72 ·
Graduate Can Galilean and Lorentz transformations coexist in one theory?
- pervect
- · Replies 7 ·
High School Can light orbit a black hole without falling in?
- Shabumi
- · Replies 7 ·
Undergrad Can electromagnetic fields warp spacetime into a black hole?
- Ascendant78
- · Replies 17 ·
Undergrad Detonator Paradox" Re-Cast: Can a Thin Wire Prevent a Bomb?
- jonspalding
- · Replies 9 ·
High School Why does an object in free fall have no net force but a standing object does?
- 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 What constraints apply to the metric tensor besides symmetry?
- quickAndLucky
- · Replies 10 ·
High School Topology on flat space when a manifold is locally homeomorphic to it
- Shirish
- · Replies 25 ·
Undergrad Does angular momentum of a test particle curve spacetime?
- sqljunkey
- · Replies 13 ·
High School Why do Planck length and Planck time scale differently in relativity?
- roineust
- · Replies 40 ·
Graduate Is x^μ in the geodesic equation a 4-vector or a component?
- jk22
- · Replies 11 ·
High School Can an Object Exceed the Speed of Light?
- isotope493
- · Replies 12 ·
High School Higher dimensional symmetries in spacetime beyond rotations and translations
- 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 Does time dilation between galaxies affect measurements of distant objects?
- AndrewDes
- · Replies 12 ·
Undergrad Computing Riemann Tensor: 18 Predicted Non-Trivial Terms
- JD_PM
- · Replies 1 ·
Graduate Is the double dual V** identical to V or just isomorphic?
- Phinrich
- · Replies 14 ·
High School How can you tell redshift from a massive galaxy vs an accelerating galaxy?
- 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 Do closed timelike loops violate the chronology protection hypothesis?
- jk22
- · Replies 3 ·
High School Gravitational Mass of C/2 Objects: Jim Adrian's Inquiry
- jamesadrian
- · Replies 3 ·
High School Does relativity affect our conscious experience of time?
- 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 How does presentism explain time desynchronization in moving bodies?
- 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 How can time pass slower if the speed of light is always constant?
- Satyam
- · Replies 43 ·
High School Can faster-than-light travel let you influence your causal past?
- MikeeMiracle
- · Replies 19 ·
Undergrad Can a stationary wave emit gravitational waves?
- 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 Why do satellite clocks run slow if motion is relative?
- 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 Do gravitational lensing observations support the need for dark matter?
- 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 Can we travel through time if we're part of space-time?
- Immortal68
- · Replies 2 ·
Undergrad Why divide four-velocity components by proper time instead of coordinate time
- 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 Role of mass in Newton's law and Einstein's GR for orbital systems
- 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 Light-clock proper time in constant acceleration
- jartsa
- · Replies 27 ·