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 Michelson-Morley Experiment: Objection Explained
- Sonuz
- · Replies 2 ·
Undergrad Why is Scalar Massless Wave Equation Conformally Invariant?
- user1139
- · Replies 2 ·
High School Find Numerical Relativity Source Code
- sqljunkey
- · Replies 1 ·
Undergrad Can a distant object behind a cosmic string appear as a double image?
- etotheipi
- · Replies 13 ·
High School Can Energy Really Be Converted to Matter in Everyday Life?
- Ebi Rogha
- · Replies 6 ·
Undergrad Linear & Rotational Motion: Speed of Tip in Lab Frame
- dextercioby
- · Replies 23 ·
High School Thought Experiment : Try and get Alice to "0%" the Speed of light
- Justice Hunter
- · Replies 15 ·
High School Conservation Laws & General Relativity: Understanding Energy
- sqljunkey
- · Replies 5 ·
Undergrad Components of *J in Kerr geometry
- etotheipi
- · Replies 4 ·
High School How Can We Derive the Relativistic Rocket Equation?
- greg_rack
- · Replies 3 ·
Graduate How can I take the derivative?
- etotheipi
- · Replies 5 ·
Graduate Obtaining the Orbit equation (Effective Potential) from the Newtonian metric
- Arman777
- · Replies 12 ·
Graduate Exploring Epsilon Simultaneity: Advantages and Applications
- etotheipi
- · Replies 5 ·
Undergrad Is mass the source of spacetime?
- Angelika10
- · Replies 68 ·
High School Relative speed of two oppositely directed light beams
- Janos Meri
- · Replies 38 ·
High School Travel Times & Distances: Twin Paradox & Alpha Centauri
- DAH
- · Replies 10 ·
Graduate Solving Linearized EFE for Newtonian Potential Under Lorentz Gauge
- Arman777
- · Replies 3 ·
Undergrad Rate of Time/Mass: Is There a Constant?
- CuriAus
- · Replies 4 ·
Graduate Find SEM Tensor from Lagrangian of Temporal Variable
- Tertius
- · Replies 7 ·
Graduate Asymptotic Flatness: Minkowski Spacetime & Galaxy Scale
- Angelika10
- · Replies 5 ·
Undergrad Asymptotically Flat Schwarzschild Metric
- binbagsss
- · Replies 5 ·
Undergrad Computing Ricci Tensor Coefficients w/ Tetrad Formalism
- snypehype46
- · Replies 8 ·
Graduate Deriving Essential Quantities from Metric Tensor for GR Calculations
- Arman777
- · Replies 20 ·
Undergrad One way speed of light measurement
- The Baron
- · Replies 32 ·
Graduate Differential Geometry Class: Suggestions Welcome
- TyP
- · Replies 3 ·
Undergrad Understanding Pseudo-Angles in Minkowski Space: A Geometric Interpretation
- Will Flannery
- · Replies 18 ·
Graduate De-Sitter Spacetime: Is it Homogeneous & Isotropic?
- pervect
- · Replies 17 ·
Undergrad Explaining Sagnac vs. SRT Violation & Reconciling Lorentz Transform
- Jim Fern
- · Replies 60 ·
Graduate Hypersurface Definition Confusion in General Relativity
- tm33333
- · Replies 5 ·
Undergrad To derive an equation of black hole thermodynamics
- etotheipi
- · Replies 21 ·
Undergrad Weak Gravitational Field & Wave Eq. - Analyzing Effects on Massless Scalar Field
- Haorong Wu
- · Replies 9 ·
Undergrad Conformally related metrics have the same null geodesics
- etotheipi
- · Replies 2 ·
Undergrad Precession of a spherical top in orbit around a rotating star
- etotheipi
- · Replies 1 ·
Undergrad Length contraction and time dilation
- rasp
- · Replies 36 ·
Undergrad The energy of a closed universe is zero
- etotheipi
- · Replies 13 ·
High School Twins Paradox Thought Exp: What Happens When Reunited?
- Sophrosyne
- · Replies 31 ·
Undergrad Ray tracing in the movie Interstellar
- etotheipi
- · Replies 9 ·
High School V=dx/dt (relative velocity between two inertial observers)
- Kairos
- · Replies 76 ·
Undergrad Recession Velocity near Cosmological Boundary: Hubble's Law?
- Asher Weinerman
- · Replies 16 ·
High School How to relate relativistic kinetic energy and momentum
- greg_rack
- · Replies 4 ·
Undergrad A bit confused with this question about the Penrose process
- etotheipi
- · Replies 11 ·
Undergrad Can a Black Hole be Destroyed by Electron Beam?
- Ilya B
- · Replies 4 ·
High School Speed of light during acceleration
- Buckethead
- · Replies 30 ·
Undergrad Is time really moving backwards?
- Joe30174
- · Replies 155 ·
Graduate Does gravitational time dilation imply spacetime curvature?
- PeterDonis
- · Replies 230 ·
Graduate Induced Metric for Riemann Hypersurface in Euclidean Signature
- craigthone
- · Replies 1 ·
Graduate Tensorial calculations - Best computational Language
- Arman777
- · Replies 33 ·
High School Can We Create a Warp Drive for Light? - Josh's Curiousity
- somedudeonline
- · Replies 15 ·
Graduate Deriving Acceleration in Gravity from E = mc^2
- boniphacy
- · Replies 7 ·
Undergrad Time-Dependent Lagrangian Leads to Time Dilation?
- stevendaryl
- · Replies 1 ·
Insights The Gravity of Laser Light: How Does It Impact Acceleration?
- Demystifier
- · Replies 46 ·
High School Realistic Window View from a Starship: Gravity, Rotation, and Blue/Red Shifting
- Grasshopper
- · Replies 22 ·
High School Misuse of Velocity Addition: Troubleshooting
- Kairos
- · Replies 4 ·
High School Force between 2 Point Charges Across Frames
- silverrahul
- · Replies 4 ·
High School Spinning Black Hole Drags Space-Time: What Causes Friction?
- happyhacker
- · Replies 4 ·
Undergrad Gravity Wave Propagation: Negative Energy Pulse?
- desertsoldier39
- · Replies 2 ·
Undergrad Sun Disappearance: Impact on Earth's Path
- Will Learn
- · Replies 20 ·
High School Experimental evidence for effective mass increasing with speed
- jeremyfiennes
- · Replies 15 ·
Undergrad Co-rotating electric potential for KN solution
- etotheipi
- · Replies 16 ·
Undergrad Hyperbolic Time Chamber: Is Time Dilation Theoretically Possible?
- Nick tringali
- · Replies 4 ·
High School Measuring Time: Identifying Slower Clock w/ Two Identical Clocks
- crastinus
- · Replies 13 ·
High School Newton's Constant in Higher Dim. Spacetimes, Velocity of Light=1
- gerald V
- · Replies 1 ·
High School Question regarding the equivalence principle
- AdvaitDhingra
- · Replies 5 ·
High School Lense-Thirring Effect and Energy Loss
- Buckethead
- · Replies 14 ·
Undergrad Understanding White Holes to Region III in GR
- etotheipi
- · Replies 7 ·
Graduate Transmission Line in Accelerating Frame: Energy Conservation Puzzle
- pervect
- · Replies 12 ·
Undergrad Finding the angular momentum of a Kerr black hole
- etotheipi
- · Replies 16 ·
High School Is Proper Time Only Perceived by External Observers?
- Kairos
- · Replies 32 ·
Undergrad Integration trouble (integral over a 2-sphere)
- etotheipi
- · Replies 3 ·
Undergrad Commutation between covariant derivative and metric
- Jufa
- · Replies 16 ·
Undergrad Refractive index of a medium in relativistic motion
- Mayan Fung
- · Replies 14 ·
Undergrad Is the Surface of a Sphere Locally Flat?
- Jufa
- · Replies 10 ·
Undergrad Why do the two mouths of a wormhole have opposite charges?
- etotheipi
- · Replies 4 ·
High School Conflict Between Time Dilation and Red/Blue Shift?
- CherylJosie
- · Replies 46 ·
High School Time Dilation Question: Two Men's Watches Differ after Space Travel
- Julius Ceasar
- · Replies 23 ·
Undergrad Left-right arrow in Einstein equation
- etotheipi
- · Replies 2 ·
Insights Maxwell’s Equations in a Static, Spherically Symmetric Spacetime
- PeterDonis
- · Replies 15 ·
Undergrad Metric Transformation b/w Inertial Frames: Analyzing Effects
- Jufa
- · Replies 2 ·
High School SR vs GR - Visual Difference between Length Contraction
- D.S.Beyer
- · Replies 11 ·
Undergrad Observe Hawking Rad. in Black Hole?
- Matthew-Champion
- · Replies 8 ·
Graduate Understanding Coordinate Transformation of a Tensorial Relation
- Arman777
- · Replies 17 ·
Undergrad Strange result from Bianchi identity, me spot the error
- gastkram
- · Replies 13 ·
Insights An Introduction to the Generation of Mass from Energy
- neilparker62
- · Replies 41 ·
Undergrad Alcubierre Warp Drive: Spacetime Diagram Explained
- timmdeeg
- · Replies 12 ·
High School Definition of Spacetime Interval
- greg_rack
- · Replies 16 ·
Undergrad Learning GR with Leonard Susskind: Prerequisites Needed?
- docnet
- · Replies 4 ·
Undergrad Parallel transport general relativity
- Jufa
- · Replies 63 ·
Undergrad A problem with how the speed of light connects to special relativity
- The Baron
- · Replies 12 ·
Graduate Conservation of energy for stationary particle attached to string
- etotheipi
- · Replies 7 ·
Graduate Gravitational Potential Energy & the Equivalence Principle
- exmarine
- · Replies 3 ·
Graduate Eddington's Experiment: Sources for Calculations
- rphysx
- · Replies 7 ·
High School Gravitational Waves: Comparing Effects on Earth
- Devin-M
- · Replies 11 ·
Undergrad Light Deflection Formula: Impact Parameter & Angle Shift
- andresB
- · Replies 7 ·
Undergrad LIGO & Special Relativity: Is Spacetime Distortion Real?
- zoltrix
- · Replies 6 ·
Undergrad Relativity's Effect on Long Rod Shape and Speed
- saddlestone-man
- · Replies 11 ·
High School Fewer seconds or shorter seconds?
- Kairos
- · Replies 109 ·
Graduate Help with 2nd Order Ricci: Indexes in GR
- GrimGuy
- · Replies 13 ·
Undergrad GR: Attractors & Liouville's Theorem
- atyy
- · Replies 5 ·
Undergrad Definition of Tensor Identity Simplification
- Arman777
- · Replies 3 ·
High School Gravitational Wave Background: The Mysteries of the Universe
- enorbet
- · Replies 2 ·