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 Metric: Proper Space vs Coordinate Space
- Haorong Wu
- · Replies 7 ·
High School Can Relativistic Effects Alter Thermodynamic Processes in Experiments?
- bwana
- · Replies 4 ·
Graduate Kerr Metric: Removing Singularity via Coordinate Transformation
- Arman777
- · Replies 1 ·
Undergrad If energy is relative, is the rest mass also relative?
- qnt200
- · Replies 36 ·
Graduate The gravitational constant measured by the smallest object
- exponent137
- · Replies 21 ·
Undergrad Are Tidal Forces Curvature of Space?
- Grasshopper
- · Replies 9 ·
High School What Happens If You Become Completely Still in Space?
- Nathan991
- · Replies 25 ·
High School How does special relativity apply to the rocket equation?
- greg_rack
- · Replies 30 ·
Undergrad Does conservation of mass violate the first postulate of special relativity?
- Sonuz
- · Replies 4 ·
Undergrad General relativity - covariant superconductivity, Meissner effect
- Maniac_XOX
- · Replies 7 ·
Undergrad Calculating the Area of an RN Event Horizon with Specific Heat Formula
- etotheipi
- · Replies 1 ·
Undergrad Why doesn't earth drag ether at full velocity according to electromagnetic theory?
- 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 Speed of rotating pencil tip in lab frame at relativistic velocity
- dextercioby
- · Replies 23 ·
High School Can an object be decelerated to zero relative velocity in any reference frame?
- Justice Hunter
- · Replies 15 ·
High School How does general relativity show energy conservation?
- 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 Why use the generalized simultaneity criterion with parameter epsilon
- 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 Why does the traveling twin see 2 years to Alpha Centauri while Earth records 4.7 years?
- 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 Why assume Minkowski spacetime at infinity in spherical metrics
- Angelika10
- · Replies 5 ·
Undergrad Asymptotically Flat Schwarzschild Metric
- binbagsss
- · Replies 5 ·
Undergrad Computing Ricci Tensor Coefficients w/ Tetrad Formalism
- snypehype46
- · Replies 8 ·
Graduate What essential GR quantities can be derived from the metric tensor?
- Arman777
- · Replies 20 ·
Undergrad One way speed of light measurement
- The Baron
- · Replies 32 ·
Graduate Differential Geometry Class: Suggestions Welcome
- TyP
- · Replies 3 ·
Undergrad Do angles and orthogonal bases work in Minkowski space?
- Will Flannery
- · Replies 18 ·
Graduate Is de Sitter spacetime homogeneous and isotropic?
- pervect
- · Replies 17 ·
Undergrad Does the Sagnac effect violate the second postulate of special relativity?
- 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 Scalar field perturbation in weak gravity: why does k² make the effect strong?
- 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 Pythagorean theorem derivation of length contraction and time dilation
- rasp
- · Replies 36 ·
Undergrad The energy of a closed universe is zero
- etotheipi
- · Replies 13 ·
High School Why does the traveling twin age less in the twin paradox?
- 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 Does Hubble's law apply at the cosmological horizon?
- Asher Weinerman
- · Replies 16 ·
High School How to relate relativistic kinetic energy and momentum
- greg_rack
- · Replies 4 ·
Undergrad Conserved quantities in charged particle motion in Reissner-Nordström spacetime
- 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 Does laser light have gravitational effects?
- Demystifier
- · Replies 46 ·
High School How stars appear through windows on a rotating starship with centrifugal gravity
- Grasshopper
- · Replies 22 ·
High School Why does relativistic mass differ when using velocity addition?
- 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 Does Earth orbit the sun instantly or with delay in Newtonian vs general relativity?
- 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 How do we determine which clock runs slower with two identical moving 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 Power drawn from battery in Born rigid accelerating spaceship
- 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 Do two men exist at the same time after one travels in space?
- 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 Why does the metric tensor change under Lorentz boost?
- 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 Can a warp bubble have a spacelike worldline in a Minkowski diagram?
- 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 ·