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 Why are there many Ricci-flat topologies but few exact vacuum solutions?
- TGlad
- · Replies 3 ·
Graduate How Does Physics Behave in 2+2 Dimensional Spacetimes?
- Intrastellar
- · Replies 7 ·
Undergrad Is Gravity Invariant During Motion?
- bahamagreen
- · Replies 2 ·
High School Why do different inertial observers measure different forces on moving charges?
- Tahmeed
- · Replies 2 ·
Undergrad Twin paradox in SR and its applicability to radioactive decay
- Scott444
- · Replies 8 ·
High School Center of momentum and mass energy equivalence
- nitsuj
- · Replies 83 ·
Undergrad Proper time to reach the singularity - rocket acceleration
- timmdeeg
- · Replies 12 ·
Undergrad Can repeated relativistic velocity boosts allow faster-than-light travel?
- Scott444
- · Replies 18 ·
High School Why can't mass be additive in relativity if mass density integrates to mass?
- sweet springs
- · Replies 27 ·
High School Could this FTL idea with a fast moving large mass be possibl
- michaellee8
- · Replies 1 ·
Undergrad Photon states should not evolve?
- Tio Barnabe
- · Replies 88 ·
Undergrad How can information possibly be created?
- Dalton bevill
- · Replies 7 ·
Undergrad How much would time pass between watching the sun set ....?
- Xarzu
- · Replies 6 ·
High School The "why" behind time dilation
- Cody Richeson
- · Replies 18 ·
High School How does time behave in overlapping gravitational fields?
- Micheth
- · Replies 9 ·
Undergrad How is time treated differently in QFT versus relativistic quantum mechanics?
- Tio Barnabe
- · Replies 3 ·
High School Can Light Speed Travel Change Our Perception of Time at Proxima Centauri?
- bluemanta9
- · Replies 8 ·
Undergrad Gravitational time dilation in Weinberg's "Cosmology"
- hiro0825
- · Replies 22 ·
High School New derivation of E=mc² from moving atoms emitting photons
- jedishrfu
- · Replies 2 ·
Undergrad Non-radial geodesics in Schwarzschild spacetime
- timmdeeg
- · Replies 11 ·
Undergrad My conclusions regarding "the laws of nature"
- davidge
- · Replies 49 ·
High School Einstein's theory of relativity and time travel
- Amateur-God
- · Replies 12 ·
Graduate What is the significance of the nonholonomity condition in General Relativity?
- samson
- · Replies 5 ·
Undergrad Domain of Applicability of Post-Newtonian Formalism
- ohwilleke
- · Replies 6 ·
Graduate Unstable 5D Theories: The Search for Stable Black Holes in Higher Dimensions
- TomServo
- · Replies 4 ·
Graduate What are the non-obvious corollaries of Lorentz invariance?
- ohwilleke
- · Replies 4 ·
High School Is there any proof that gravity is an attractive force?
- Cubbie Boy
- · Replies 4 ·
Undergrad Why do people keep saying photons are timeless?
- weezy
- · Replies 27 ·
Undergrad Force on an Object according to the General theory of relativity
- KallaNikhil
- · Replies 4 ·
Undergrad Could Gravity Ever Be Negative?
- caters
- · Replies 8 ·
High School Does gravitational time dilation cause gravity's attraction?
- Geodesic Worm
- · Replies 10 ·
High School Does Gravity Have the Power to Slow Down Light?
- Kerry Tawadros
- · Replies 16 ·
Undergrad Relativistic Aberration: Intuitive Understanding
- Happiness
- · Replies 4 ·
High School Minkowski metric, scalar product, why the minus sign?
- peter46464
- · Replies 14 ·
Undergrad Variation of metric tensor in geodesic equation derivation
- binbagsss
- · Replies 3 ·
High School Newton's law under Lorentz transformation
- davidge
- · Replies 18 ·
Undergrad Mechanical clocks and time dilation
- exmarine
- · Replies 15 ·
Undergrad Is the Massless Photon Explanation for E=mc2 Valid?
- john t
- · Replies 41 ·
Undergrad Does the *First Postulate* Prohibit different time dilations?
- Physics_Teacher
- · Replies 53 ·
Undergrad Solving Quantum Mechanics in Space-Time: Effects of General Relativity
- davidge
- · Replies 5 ·
Undergrad Is there an analog to Einstein's field equations for 2D?
- Cathr
- · Replies 12 ·
High School Fourier Transform of Spacetime
- fanieh
- · Replies 14 ·
Undergrad Why does general relativity require inertial mass to equal gravitational mass?
- Tio Barnabe
- · Replies 11 ·
Graduate Taylor expansion of dispersion relation - plasma physics
- SMannion
- · Replies 8 ·
High School Can space be curved in relation to an absolute straight space?
- PauloConstantino
- · Replies 78 ·
Undergrad Length Contraction: Muon vs Earth Frames
- TheWonderer1
- · Replies 3 ·
Undergrad Really parabolic light ray in an accelerated elevator?
- Thankall
- · Replies 19 ·
Undergrad Gravitational Bending vs. Refraction
- Gort
- · Replies 9 ·
Undergrad Spaceship moves away from the Earth
- Pritamstar
- · Replies 6 ·
Undergrad Inflation theory and General Relativity
- Tio Barnabe
- · Replies 10 ·
Undergrad Can Flamm's Paraboloid be described by Cartesian equations?
- Victor Escudero
- · Replies 1 ·
Graduate How does the Lagrangian in equation (2) follow from equation (1)?
- Pentaquark5
- · Replies 8 ·
Graduate What is the concept of no prior geometry in GR?
- bhobba
- · Replies 20 ·
Undergrad Is Expansion the Same as Contraction?
- theoretical symmetry
- · Replies 18 ·
Undergrad Large object entering a small BH
- Tio Barnabe
- · Replies 34 ·
High School False predictions of relativistic mass
- Tahmeed
- · Replies 17 ·
High School How does this equation imply that time slows down?
- Heatherfield
- · Replies 10 ·
High School Einstein's Equivalence Principle: What's New?
- davidge
- · Replies 6 ·
High School Unifying general relativity and quantum theory
- ISamson
- · Replies 1 ·
High School Mass and energy from Earth's gravitational field
- John M
- · Replies 16 ·
Undergrad Michelson Morley experiment: relativistic explanation
- crick
- · Replies 3 ·
High School Special relativity and the flow of time?
- Akriel
- · Replies 41 ·
Undergrad Non-vacuum solutions for evaporating black holes
- Tomas Vencl
- · Replies 2 ·
Undergrad Gravity as geometry vs gravity traveling at c
- Canis Lupus
- · Replies 16 ·
Undergrad Why are the equations for dt/du and Dt[a]/Du equal in the geodesic equation?
- Apashanka Das
- · Replies 41 ·
Undergrad Would detecting gravitons mean general relativity is flawed?
- KallaNikhil
- · Replies 10 ·
Undergrad GR and its bending of space time
- loic patry
- · Replies 2 ·
Graduate Is the Metric Tensor Invariant under Lorenz Transformations in M4?
- Fermiat
- · Replies 5 ·
Undergrad Bending of light - caused by gravity or relativity?
- Prometeus
- · Replies 10 ·
Undergrad White holes and other universes
- Tio Barnabe
- · Replies 3 ·
Graduate Solving BTZ Black Hole w/ Euclidean Method
- craigthone
- · Replies 4 ·
Undergrad Metric for Lambdavacuum EFE - Radial Coordinates
- redtree
- · Replies 8 ·
Undergrad Curvature of space and spacetime
- gpran
- · Replies 12 ·
Graduate On the formation of a black hole due to high kinetic energy
- Joker93
- · Replies 32 ·
High School Is gravity both a force and not a force?
- Lunct
- · Replies 30 ·
High School Do merging black holes intrude into a higher dimension?
- Tom Mcfarland
- · Replies 69 ·
Undergrad Rotating Black Holes: A Century of Discovery & Beyond
- snorkack
- · Replies 7 ·
High School Does spacetime curvature have a discontinuity at a mass's light cone surface?
- bahamagreen
- · Replies 11 ·
Undergrad Did energy or mass come first in the universe?
- Pring
- · Replies 41 ·
High School Does an object moving in a geodesic accelerate?
- Lunct
- · Replies 6 ·
Undergrad What happens at r ≤ rS in the Schwarzschild metric?
- Tio Barnabe
- · Replies 6 ·
Undergrad Modeling continuous spacetime with infinite sets
- jaketodd
- · Replies 24 ·
Undergrad Particle at event horizon as black hole evaporates
- Curtnos
- · Replies 2 ·
Undergrad Does the aberrated light ray pass through the source in the lab frame?
- Tahmeed
- · Replies 3 ·
High School Identical devices in different places
- clickalot
- · Replies 5 ·
High School How Does Time Travel Influence Aging?
- asesena
- · Replies 3 ·
Graduate Gravitational Bending of Light: Equation for Photon Trajectory in Strong Fields
- kevindin
- · Replies 9 ·
Undergrad The spacetime curvature changed by an object
- KallaNikhil
- · Replies 2 ·
Graduate Plasma physics - relativistic derivation
- SMannion
- · Replies 3 ·
High School Does Zero Rest Mass Mean No Particle Exists?
- Tio Barnabe
- · Replies 7 ·
Undergrad Traveling at a speed faster than light
- Saurabh Kumar Singh
- · Replies 5 ·
Undergrad Gravitational time dilation, proper time and spacetime interval
- haushofer
- · Replies 62 ·
High School Can Time Really Loop and Repeat Itself in the Universe?
- Mega_Destructor
- · Replies 2 ·
High School Simultaneity in Non-Observable Universe: Is it Possible?
- Chris Miller
- · Replies 7 ·
Graduate Speed of Gravitational Waves confirmed by Experiment?
- Analogworm
- · Replies 4 ·
Undergrad Does gravitational influence extend throughout the universe in general relativity?
- Leonardo Muzzi
- · Replies 11 ·
Undergrad Diffeomorphism invariance of GR
- Frank Castle
- · Replies 73 ·
High School Micro Black Holes: The Possibility of Creating an Extra Dimension
- Gilgamesh
- · Replies 2 ·
Undergrad Why can't the interior of a black hole be empty?
- Pencilvester
- · Replies 10 ·
Undergrad Do simultaneity relations change when a moving observer comes to rest?
- rajeshmarndi
- · Replies 18 ·