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.
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Graduate Difficulties in the Computation of the Kretschmann scalar
- Hamilton
- · Replies 1 ·
Graduate Near-instant Acceleration / Clocks
- 1977ub
- · Replies 15 ·
Graduate Measuring possible one-way anistropy of light speed
- seb7
- · Replies 28 ·
Graduate Theory on Speed of Light & Faster Travel
- fr0zencipe
- · Replies 5 ·
Graduate Proper time for polar and equatorial orbits in Kerr metric
- dman12
- · Replies 1 ·
Graduate Composition of 2 transformations of E
- Happiness
- · Replies 10 ·
Graduate Can we distinguish between black holes and white holes?
- Khashishi
- · Replies 3 ·
Graduate Sphere of Uniform Density: Exact Solution to Einstein's Field Eqns?
- cuallito
- · Replies 1 ·
Graduate Connection between Lorentz covariance and special relativity
- fezster
- · Replies 3 ·
Graduate Gravity and General Relativity: The Curvature of Space-Time
- ElectroViruz
- · Replies 2 ·
Graduate Tensor Density Transformation Law: Order of Jacobian Matrix?
- binbagsss
- · Replies 6 ·
High School Inertial and Non-Inertial Reference Frames
- SQLMAN
- · Replies 3 ·
Graduate Mass of Box A vs Box B with Photon Inside
- JasonWuzHear
- · Replies 2 ·
Graduate Symmetrical time dilation implies relativity of simultaneity
- pervect
- · Replies 9 ·
Undergrad Does the mass of a spinning object twist spacetime?
- quincy harman
- · Replies 14 ·
Graduate Transformation equation of velocity contradicts stellar aberration?
- Happiness
- · Replies 11 ·
Graduate What is the Geodesic Equation for FRW Metric's Time Component?
- unscientific
- · Replies 5 ·
Graduate Quick expression on geodesic equation
- unscientific
- · Replies 2 ·
Graduate Proving Total Covariant/Total Partial Derivative EFE Derivation
- binbagsss
- · Replies 3 ·
Graduate Proof of Transformation Equation for Electric Field Ex
- Happiness
- · Replies 7 ·
High School If we can move at the speed of light, can we pass a small hole?
- beste ulusoy
- · Replies 27 ·
Graduate Basic GR Questions: Krushkal Extension of Schwarzschild Metric
- kau
- · Replies 18 ·
Graduate Time Dilation Effects of Warp Travel | 65 Characters
- TheFloppyFIsh
- · Replies 6 ·
Graduate Intuitive Interpretation of Rest Energy
- Alexander83
- · Replies 4 ·
Graduate How to calculate cosmological constant?
- Ans
- · Replies 17 ·
Graduate Tensor density from wedge product
- Ravi Mohan
- · Replies 10 ·
Graduate Spatially separated events are time relative but .
- Pleonasm
- · Replies 31 ·
Graduate Weak Field Approximation and Tidal Forces
- nigelscott
- · Replies 6 ·
Undergrad Why do objects rest on space thus causing gravity?
- ILikeAnswers
- · Replies 40 ·
Graduate The Alice and Bob example of the FTL violates causality
- L.E.N
- · Replies 22 ·
Undergrad Lorentz Contraction: How Fast Can Objects Travel?
- ajay.05
- · Replies 4 ·
Graduate Combine Special Relativity & Maxwell Equation Easily
- TimeRip496
- · Replies 3 ·
Graduate Magnetic force in a moving coordinate system
- brianeyes88677
- · Replies 5 ·
Graduate Time elapsed along an accelerated world line
- PWiz
- · Replies 9 ·
Graduate Understanding length contraction in SR
- vinven7
- · Replies 25 ·
Graduate Order of Acceleration in Slow Motion Approx - Q&A
- binbagsss
- · Replies 2 ·
Graduate Surfing a Gravitational Wave: Is It Possible?
- Krasimir
- · Replies 2 ·
Graduate Does Hawking radiation take place at the apparent horizon?
- wywong
- · Replies 18 ·
Graduate Hilbert-Einstein action, total derivative vanish
- binbagsss
- · Replies 6 ·
Graduate Raising and lowering Ricci Tensor
- unscientific
- · Replies 9 ·
Graduate Speed of Light in Special Relativity: Explained & Questioned
- Sameeran N Rao
- · Replies 1 ·
Graduate Fizeau's Experiment interpretation
- doaaron
- · Replies 7 ·
Graduate String Theory's inconsistency with Relativity
- Maxranger
- · Replies 9 ·
Graduate How does light slide sideways?
- Rising Eagle
- · Replies 50 ·
Graduate Comparing Weak Field Approx, Sign Question, & Derivatives
- binbagsss
- · Replies 5 ·
Graduate Weak Gravity & Newtonian Limit: Letting g^kmu = eta^kmu
- unscientific
- · Replies 4 ·
Graduate Hawking radiation prevents event horizon crossing?
- Asher Weinerman
- · Replies 43 ·
Graduate Why can photons only move at the speed of light?
- debeselis
- · Replies 18 ·
Graduate Einstein Hilbert action, why varies wrt metric tensor?
- binbagsss
- · Replies 1 ·
Graduate Formation of X-Ray Binaries Outside Black Holes
- Abtinnn
- · Replies 4 ·
High School Time Relative to Position: Yes
- Blop
- · Replies 3 ·
Graduate Particles' Energy Loss: Atom's Fate in an Expanding Universe
- hagar
- · Replies 8 ·
Graduate A speed equivalent of gravitational acceleration?
- friend
- · Replies 13 ·
Graduate Accretion Discs in Non-Rotating Black Holes: A Closer Look at Sagittarius A*
- RoDnSuE
- · Replies 2 ·
Graduate Weak Field Approximation - Quick Sign Question
- binbagsss
- · Replies 4 ·
Graduate Velocity frame of reference in lorentz force equation
- Atheer
- · Replies 10 ·
Graduate Equation for time dilation of body in orbit around Kerr black hole?
- JesseM
- · Replies 40 ·
Graduate Free Fall vs accelerated reference frame question.
- BTBlueSkies
- · Replies 10 ·
Graduate Photon Mass: Is It Really Zero or Infinite?
- prashant.d000
- · Replies 26 ·
Graduate Solving the Mystery of Relativity: What Postulates Say?
- Sampad Saha
- · Replies 5 ·
Graduate Understand Postulates of Relativity & Inertial Frames
- Sampad Saha
- · Replies 2 ·
Graduate Acceleration in Rindler coordinates
- Ali.Sadeghi
- · Replies 2 ·
Graduate Some easier equotation for gravitational time dilation?
- SpiderET
- · Replies 13 ·
Undergrad The "x'=x-vt" in Galilean/Lorentz transformation
- JohnTitor
- · Replies 3 ·
Graduate Velocity Addition for Orthogonal Boosts in SR
- tfhub
- · Replies 1 ·
Graduate Ricci tensor variation in Friedmann-Robertson-Walker metric
- yancey
- · Replies 3 ·
Graduate Raising Indices with Minkowski Metric: Solving Weak Field Approx
- binbagsss
- · Replies 2 ·
High School Is Falling to Earth's Core 42 or 38 Minutes?
- RandyD123
- · Replies 4 ·
Graduate Understanding 2 Effects of G.R.: Periastron Precession & Pulsation Periods
- Dyatlov
- · Replies 8 ·
Graduate Creation of Time: Understanding the Universe Through Perspective
- Katrex
- · Replies 3 ·
Graduate Relativity and Circular Magnetic Field
- userunknown
- · Replies 27 ·
Graduate The importance of velocity in simultaneity
- sjkelleyjr
- · Replies 108 ·
Graduate Solving Friedmann Equations with Cosmological Constant
- binbagsss
- · Replies 12 ·
Graduate Master Index Notation: How to Ensure Accuracy in Calculations
- Petraa
- · Replies 28 ·
Graduate Direction of length contraction in combined motion
- Ookke
- · Replies 24 ·
Graduate Lorenz covariance vs proofs of relativity theory
- SpiderET
- · Replies 28 ·
Graduate Time Dilation: Inside a Rotating Sphere of Light
- vikram chawan
- · Replies 5 ·
Graduate Definition of Rapidity: Learn About Hyperbolic Trigonometric Functions
- JD96
- · Replies 23 ·
Graduate Are all null geodesics also affine?
- kkz23691
- · Replies 26 ·
Graduate Source of Magnetic component of light
- Danyon
- · Replies 17 ·
Graduate Curvature, Geodesics and Acceleration in GR
- nigelscott
- · Replies 5 ·
Graduate Time Dilation: SR Basics & Confusion
- thrush
- · Replies 2 ·
Undergrad Neutrons in electromagnetic fields
- Danyon
- · Replies 11 ·
Graduate Rubber Sheet Analogy: How Mass Bends Spacetime
- Abtinnn
- · Replies 6 ·
Graduate Lorentz contraction in circular particle accelerators
- QuasiParticle
- · Replies 7 ·
Graduate Time Dilation: Does Total Speed Matter?
- LM542
- · Replies 3 ·
Graduate Does Light Move or Exist Simultaneously in Special Relativity?
- Ravi Prakash
- · Replies 14 ·
Graduate Is It Possible to Independently Vary Kij in Both Methods?
- nenyan
- · Replies 3 ·
Graduate Space Curvature: Friedmann Models Explained
- SteveDC
- · Replies 1 ·
Graduate Superluminal propagation of fields
- Jesus
- · Replies 2 ·
Graduate Superluminal and temporal effect
- Edward Wij
- · Replies 8 ·
Undergrad Special Relativity: Light & Time Travel Questions
- james weaver
- · Replies 10 ·
Graduate Understanding Gauge Symmetry in Massive Gravity: Analysis of Fierz-Pauli Action
- Mentz114
- · Replies 47 ·
Graduate What is Rieman for a conformal metric?
- Kurvature
- · Replies 40 ·
Undergrad Speed of Light: Stationary & Moving Observers
- davedude
- · Replies 3 ·
Graduate Time Dilation & Visual Observation of Black Holes
- EskWIRED
- · Replies 3 ·
Graduate How Does the Element of Solid Angle Transform Under Lorentz Transformation?
- ShayanJ
- · Replies 12 ·
Graduate Realizing Warp Drive with Matter-Antimatter Fuel Cells
- 5not42!
- · Replies 2 ·
Graduate Extension of Schwarzschild Light Cones: White Hole/Black Hole
- binbagsss
- · Replies 1 ·
Undergrad Light from Train Scenario: Student Question Explained
- Fred Choi
- · Replies 2 ·