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 How is SR applied to circular motion?
- lomidrevo
- · Replies 33 ·
Undergrad Time dilation (speed Vs. acceleration)
- Crowxe
- · Replies 7 ·
Undergrad Why does time slow down near extreme spacetime curvature?
- deuce123
- · Replies 7 ·
Undergrad Inconsistency in Length contraction
- KallaNikhil
- · Replies 15 ·
Undergrad Does Spacetime Have Elastic Properties?
- Victor Escudero
- · Replies 7 ·
Undergrad Einstein's light clock thought experiment
- David CLayton
- · Replies 9 ·
Undergrad How do we determine a black hole's shape from equations?
- davidge
- · Replies 11 ·
Undergrad Difference between Schwarzschild metric and Gravity well.
- Victor Escudero
- · Replies 1 ·
High School Moving in the 4th Dimension -- Does Time have a velocity?
- eaglechief
- · Replies 20 ·
Undergrad When will metric compatibility hold/not hold?
- Ron19932017
- · Replies 5 ·
High School How does gravity affect massless light?
- Eradok
- · Replies 16 ·
Undergrad Resolving the Three Colliding Observers Paradox in Special Relativity
- Meatlofe
- · Replies 28 ·
Undergrad Classical mass vs. relativistic mass for electronic analogy
- learn.steadfast
- · Replies 5 ·
Undergrad Relativistic mass increase (simple or not)
- sha1000
- · Replies 11 ·
High School Is Time Travel Feasible Within the Limits of Light and Atomic Interactions?
- Andrew0853
- · Replies 3 ·
Undergrad How Does Relativistic Angular Velocity Affect a Rotating Disk's Behavior?
- Tahmeed
- · Replies 26 ·
Undergrad Why does time run slower in the spaceship or the capsule?
- sha1000
- · Replies 26 ·
Undergrad Computing covariant derivatives with Minkowski metric
- davidge
- · Replies 17 ·
Undergrad Solving General Relativity Equations
- Arman777
- · Replies 16 ·
High School Understanding Centre of Mass in Stationary Objects
- Ross B
- · Replies 57 ·
Undergrad What happens to local clock when many observers are moving wrt each other?
- fondamental
- · Replies 20 ·
Undergrad Why does measuring length via moving point D give conflicting results?
- Happiness
- · Replies 8 ·
Undergrad Can wavelength shifts reveal whether simultaneous events actually are simultaneous?
- Nickelodeon
- · Replies 5 ·
High School Why does Earth appear 16 minutes behind where it actually is when viewed from the Sun?
- Ross B
- · Replies 4 ·
Undergrad Can spacetime curvature be transformed away?
- FallenApple
- · Replies 5 ·
Undergrad What constrains the metric tensor field in GR?
- TGlad
- · Replies 22 ·
High School Being on a different IRF, wouldn't light appear to slow?
- WhoCares
- · Replies 10 ·
Undergrad Observing a mass forever approaching a BH, and BH growth
- wendisf
- · Replies 36 ·
Undergrad Can Emission Theory Produce Doppler-Shift Formula?
- Happiness
- · Replies 1 ·
High School Can a Spinning Object Increase its Mass through Acceleration?
- mpolo
- · Replies 82 ·
Undergrad Ebeb's diagram and time dilation in the twin paradox
- Grimble
- · Replies 92 ·
High School Does Earth's Mass Affect the Length of a Day?
- sanujan
- · Replies 2 ·
High School Can we detect changes inside a black hole through orbits?
- Torog
- · Replies 20 ·
Graduate What is the relationship between Kerr-Newman black hole mass, angular momentum and charge?
- Hiranya Pasan
- · Replies 4 ·
High School Gravity and the Direction of Time
- White Rook
- · Replies 2 ·
Undergrad Energy density and pressure of perfect fluid
- RiverL
- · Replies 1 ·
Undergrad Merging Charged BHs: Is A's Observation Continuous or Discontinuous?
- anorlunda
- · Replies 10 ·
Undergrad Twin paradox in GR - negative time?
- MrBlank
- · Replies 40 ·
Undergrad Questions I have been thinking of regarding black holes
- Klasvaakie
- · Replies 14 ·
Undergrad Where does the line element of Minkowiski space come from?
- Ahmed Atef
- · Replies 4 ·
Undergrad Relativistic Field Transformations and EM Waves
- calinvass
- · Replies 7 ·
High School Does a clock slow down for someone moving at 99% the speed of light?
- mpolo
- · Replies 3 ·
High School Does Mass determine our depth in the fabric of space?
- genphis
- · Replies 48 ·
Graduate Solve Bending of Light Formula Problem
- alex4lp
- · Replies 3 ·
Undergrad Two Conserved Quantities Along Geodesic
- maughanster
- · Replies 6 ·
High School Uniform-gravitational time dilation -- exact or approximate
- Hiero
- · Replies 34 ·
Undergrad Is Time Just a Stubborn Illusion in the Block Universe Theory?
- tophatphysicist
- · Replies 131 ·
High School Does the universe's age depend on the observer's reference frame?
- Chris Miller
- · Replies 41 ·
High School What course would explain why c is a hard limit?
- ibkev
- · Replies 19 ·
Undergrad Time dilation in components of an object
- brainierthaneinstein
- · Replies 2 ·
Undergrad How do things pass through event horizons?
- FallenApple
- · Replies 17 ·
Undergrad Did Newton believe in absolute motion?
- MikeGomez
- · Replies 5 ·
Graduate Schwarzschild-deSitter Metric: Radial Locations of Event Horizons
- Jim
- · Replies 2 ·
Undergrad Laws of physics and inertial systems
- Pushoam
- · Replies 7 ·
High School Special relativity and expansion of the Universe, A paradox
- Rafeek AR
- · Replies 47 ·
Undergrad What force accelerates a car down hill?
- Zutswang
- · Replies 33 ·
High School How are the concepts of space, time, and space-time related?
- uday01
- · Replies 10 ·
Undergrad Black Hole Formation Sequence: Time in the Equations?
- Funestis
- · Replies 5 ·
Undergrad Twin Paradox - Observation at Turnaround Moment
- Andy_K
- · Replies 20 ·
Undergrad Confusing descriptions of an "expanding" universe
- Ghost117
- · Replies 8 ·
Undergrad Do spin-0 particles return to their original state after rotation?
- davidge
- · Replies 4 ·
Undergrad Why Denote 1 Form as dx? - Sean Carroll's Lecture Notes on GR
- Ron19932017
- · Replies 6 ·
Undergrad Frames of Reference and Time Perception in Space Travel
- Cathr
- · Replies 26 ·
Undergrad How to find the stress-energy tensor for a given scenario
- davidge
- · Replies 10 ·
High School Does length contraction produce compressive forces on the moving object?
- ibkev
- · Replies 11 ·
Undergrad Phase delay effects on rotating observers and magnets
- Xynon
- · Replies 5 ·
Undergrad Calculating the Optical Appearance of Rolling Rings: A Methodology by Ø. Grøn
- Laurie K
- · Replies 1 ·
Undergrad Kerr orbit simulator with YouTube videos
- m4r35n357
- · Replies 44 ·
High School Preserve Fresh Meat: Spin at Relativistic Speeds?
- guigabyte
- · Replies 8 ·
High School Does Acceleration Affect Time Dilation?
- Chris Miller
- · Replies 82 ·
Graduate Algebraic Proofs of Levi-Civita Symbol Identities
- Geometry_dude
- · Replies 8 ·
Undergrad Einstein clock syncing with one way light emission absorber
- Alfredo Tifi
- · Replies 37 ·
High School Gravity facts, or close to fact
- omnip
- · Replies 5 ·
Undergrad Gravity in Einstein's elevator without spacetime curvature
- pervect
- · Replies 47 ·
Undergrad Why is general relativity a theory of gravity if energy alone curves spacetime?
- davidge
- · Replies 13 ·
High School Why does a body accelerate toward a planet if spacetime is just curved?
- Deepak K Kapur
- · Replies 8 ·
High School Minkowski diagram with oblique coordinates in relativity text
- Hiero
- · Replies 20 ·
High School Do electromagnetic waves have a proper time?
- stoomart
- · Replies 6 ·
High School Frame dragging and co-rotating shells
- Buckethead
- · Replies 14 ·
High School Equation for final velocity given energy, mass, and distance in relativistic regime
- BitWiz
- · Replies 10 ·
High School Mechanism of Curvature of Space: Does it Happen Instantly?
- Deepak K Kapur
- · Replies 5 ·
Undergrad Possible error in f(R) gravity field equation derivation
- Dazed&Confused
- · Replies 12 ·
Undergrad Can distant galaxies receding faster than c mean light speed isn't constant?
- Akwinder Singh Mander
- · Replies 20 ·
Undergrad Geometric interpretation of contravariant and covariant bases in curvilinear coordinates
- Ron19932017
- · Replies 15 ·
Insights The Revival of Newton-Cartan Theory - Comments
- haushofer
- · Replies 9 ·
Undergrad Special Relativity Course at World Science University by Brian Greene
- Andy_K
- · Replies 4 ·
Undergrad Is the FLRW Metric the Only Form for One-Dimensional Maximally Symmetric Spaces?
- davidge
- · Replies 52 ·
High School Is the speed of light a degree of freedom?
- Killtech
- · Replies 33 ·
High School Can we transmit signals faster than light through a rigid rod?
- jonjacson
- · Replies 11 ·
Graduate Deriving Equations of Motion in GR
- Matter_Matters
- · Replies 4 ·
Graduate Usage of kinetic energy in proof for E=mc^2
- georg gill
- · Replies 6 ·
Undergrad What is the four-vector for electric and magnetic dipole moments?
- arpon
- · Replies 2 ·
Undergrad Spacetime moving faster than speed of light?
- arlesterc
- · Replies 9 ·
Undergrad Mass/energy in general relativity
- Umaxo
- · Replies 30 ·
Undergrad A _perfectly_ symmetric twin paradox cases
- stefanbanev
- · Replies 35 ·
Undergrad Why does a relativistic rocket appear to jump when it stops?
- exponent137
- · Replies 14 ·
High School Can particles at different velocities interact if they experience time differently?
- MrDickinson
- · Replies 30 ·
Undergrad 6-dimensional representation of Lorentz group
- Silviu
- · Replies 6 ·
Undergrad Deriving Schwarzschild Interior Boundary Conditions
- Ibix
- · Replies 3 ·
Undergrad Simultaneity hyperplanes "curved" while stationary?
- KyungMin
- · Replies 20 ·