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
Graduate Do Observers at Rest See Time Dilation When Others Stop Instantaneously?
- actionintegral
- · Replies 5 ·
Graduate Can magnetic fields be canceled by relative motion in special relativity?
- Epsilon Pi
- · Replies 13 ·
Graduate Train braking paradox: does simultaneity affect whether the train passes the platform?
- Ookke
- · Replies 32 ·
Graduate Light's Mass: 0 N = Infinite Acceleration?
- unscientific
- · Replies 8 ·
Graduate Understanding Ricci and K Curvature in 2 Dimensions: A Simple Explanation
- stephen_weber
- · Replies 3 ·
Undergrad Assume I travel near c from a planet 5 light years away
- Altair
- · Replies 2 ·
Graduate Would a Universe-Mass Black Hole Trigger a Big Bang?
- bananan
- · Replies 1 ·
Graduate Charged particle in a magnetic field
- Emanresu
- · Replies 26 ·
Undergrad Gravitational Wave: Does Vibrating Mass Emit Waves?
- Ahmed Abdullah
- · Replies 5 ·
Graduate Weak and strong equivalence principles
- lalbatros
- · Replies 1 ·
Graduate Does spatial contraction increase an object's density in my frame?
- b2386
- · Replies 3 ·
Graduate Paths of Objects in GR: Acceleration vs Constant Velocity
- Swapnil
- · Replies 7 ·
Undergrad Is the definition of physics as matter and energy redundant in special relativity?
- bernhard.rothenstein
- · Replies 6 ·
High School What is the Reason for Gravitation?
- priya_india
- · Replies 10 ·
Graduate A video intro to General Relativity
- Thrice
- · Replies 10 ·
Graduate How does the size of a black hole affect its ergosphere and event horizon?
- Skhandelwal
- · Replies 10 ·
Graduate Can Shawyer's EmDrive Really Defy the Laws of Physics?
- scott1
- · Replies 4 ·
Graduate Light deflection at high speed
- Ich
- · Replies 9 ·
Graduate Must an observer be equidistant from two events for them to appear simultaneous?
- pivoxa15
- · Replies 8 ·
Graduate EM Fields, Space-Time, Gravity: Unifying Theory?
- SBryars
- · Replies 1 ·
Graduate Is it Possible to Beat a Beam of Light and Shake Hands with Yourself?
- eNathan
- · Replies 6 ·
Graduate Is my understanding of time dilation correct?
- kishtik
- · Replies 5 ·
Graduate Can Gravity and Electromagnetism Be Unified in Physics?
- SBryars
- · Replies 2 ·
Graduate Does Rest Mass Affect the Bending of Spacetime?
- Elfie
- · Replies 24 ·
Graduate Will O' Clocks Show Different Times?
- Swapnil
- · Replies 31 ·
Graduate Why can't you define linear momentum in curved spacetime?
- lightarrow
- · Replies 4 ·
Graduate How Do Observers in Different Frames Perceive Simultaneity Differently?
- Repertoire
- · Replies 16 ·
Graduate Twin paradox in a hyperspherical universe without acceleration
- michael879
- · Replies 16 ·
High School Light Physics: Can Photons/Electrons Travel Together?
- alpaolo
- · Replies 1 ·
Graduate Why is the speed of light constant in all reference frames?
- michael879
- · Replies 71 ·
Graduate Would collapsing objects reach infinite density or stop at some limit?
- Skhandelwal
- · Replies 14 ·
Undergrad Can the speed of light be slowed down and what would happen if it could?
- Quadruple Bypass
- · Replies 19 ·
Undergrad Red shifting light from moving and accelerating observers
- WendyE
- · Replies 8 ·
Undergrad Velocity vs Distance - Clarifying a Moronic Question
- jnorman
- · Replies 31 ·
Graduate Tidal forces in free fall to a neutron star vs expansion in FRW spacetime
- oldman
- · Replies 44 ·
Graduate Does Time Dilation Create a Sense of Slow Motion for Observers in Motion?
- QuantumKing
- · Replies 3 ·
Graduate Will Accelerating a Massive Object Create a Black Hole?
- michael879
- · Replies 6 ·
Graduate How Accurate Are Recent Tests of General Relativity Using the Double Pulsar?
- ZapperZ
- · Replies 9 ·
Graduate Can entanglement violate causality in special relativity?
- notknowing
- · Replies 15 ·
Graduate Infinite Mass, Infinite Energy
- WhyIsItSo
- · Replies 32 ·
Graduate Books for learning relativity with minimal math background
- WhyIsItSo
- · Replies 8 ·
Graduate Relativity in Minkowski Space and Minkowski Diagram
- Majid
- · Replies 4 ·
High School Why Does Approaching the Speed of Light Affect Mass and Time?
- semidevil
- · Replies 8 ·
Graduate =Special Theory Of Relativity=
- unscientific
- · Replies 40 ·
Undergrad How is the universe expanding?
- WendyE
- · Replies 12 ·
Undergrad Is the speed of light really changing over time?
- kuahji
- · Replies 6 ·
Graduate Basis for the postulate that all physics is the same for all inertial reference frame
- leright
- · Replies 26 ·
Graduate Can Massive Particles Ever Reach the Speed of Light?
- masudr
- · Replies 8 ·
Graduate Special Relativity Between Reality and Illusion
- Manaf
- · Replies 35 ·
Graduate Why doesn't time dilation work symmetrically in the twin paradox?
- KingOrdo
- · Replies 17 ·
Graduate General relativity and dark matter
- cymric
- · Replies 2 ·
Graduate Two asteroids separated by distance L and time dilation without length contraction
- neutrino
- · Replies 6 ·
Graduate How Does Gravity Affect the Behavior of Light?
- alpaolo
- · Replies 4 ·
Graduate Concerned on the relativity of lengths
- myoho.renge.kyo
- · Replies 4 ·
Why were there so many geniuses ?
- notknowing
- · Replies 7 ·
Graduate When moving fast, you're too busy to age
- birulami
- · Replies 23 ·
Graduate Charge Invariant: Intuitive Reason?
- Swapnil
- · Replies 4 ·
Graduate Why must the Lorentz Transformations Be Linear?
- emob2p
- · Replies 11 ·
Graduate From SR to GR in an easy math (and physical) way
- lokofer
- · Replies 1 ·
High School No meaning to go backwards in time
- Flatland
- · Replies 32 ·
Graduate Should i take differential geometry?
- ia_
- · Replies 4 ·
Graduate Why didn't Einstein just invent the concept of gravitational field?
- Swapnil
- · Replies 10 ·
Graduate What is the Best Self-Study Book for General Relativity?
- Swapnil
- · Replies 15 ·
Graduate Understanding Lorentz Equations and the Solution to Maxwell's Equations Variance
- dak246
- · Replies 19 ·
Graduate General Relativity + Electrodynamics #2
- JustinLevy
- · Replies 10 ·
Graduate What is the Meaning of Force in General Relativity?
- lokofer
- · Replies 5 ·
Graduate General Relativity + Electrodynamics
- JustinLevy
- · Replies 5 ·
Graduate Relativistic Interpretation of the Kennedy Thorndike Experiment?
- clj4
- · Replies 20 ·
Undergrad What is the principle of equivalence in physics?
- pellman
- · Replies 5 ·
Graduate What Contracts During Length Contraction in Special Relativity?
- silverdiesel
- · Replies 15 ·
Graduate Can resistance to acceleration reveal your absolute speed in relativity?
- silverdiesel
- · Replies 11 ·
Undergrad Why do observers in special relativity see different measurements?
- b2386
- · Replies 2 ·
Undergrad Do black holes evaporate in an expanding universe?
- ifarcas
- · Replies 4 ·
Graduate There is no gravitational dipole
- Crosson
- · Replies 41 ·
Graduate Does Time Stop in a Black Hole?
- bananan
- · Replies 12 ·
Graduate Does relative velocity have meaning in general relativity?
- Oxymoron
- · Replies 19 ·
Graduate Does Relativistic Kinetic Energy Account for Mass Increase at High Speeds?
- Born2Perform
- · Replies 19 ·
Graduate Time dilation calculation at 0.9c relative velocity
- myoho.renge.kyo
- · Replies 15 ·
Graduate Magnetism and radiation as a consequence of SR
- jainabhs
- · Replies 1 ·
Graduate The Pseudo-Tensor H for Torsionless Space-Time?
- dextercioby
- · Replies 20 ·
Graduate Time dilation experiments with spacecraft
- Phobos
- · Replies 5 ·
Undergrad Is Tensor Algebra Necessary to Understand General Relativity?
- jainabhs
- · Replies 1 ·
Undergrad Do relativistic and non-relativistic mass differ functionally?
- kc7rad
- · Replies 23 ·
Graduate Can near-lightspeed travel and quantum teleportation allow information from the future?
- blackwizard
- · Replies 10 ·
Graduate Free resources for learning special and general relativity
- jainabhs
- · Replies 1 ·
Graduate Galileo's Relativity: Theory of Clocks Synced by Signal?
- bernhard.rothenstein
- · Replies 1 ·
Graduate Why can't light escape a black hole if it's the fastest thing?
- Nexus555
- · Replies 1 ·
Graduate How Can Numerical Solutions to General Relativity Enhance Computational Physics?
- lokofer
- · Replies 2 ·
Graduate How Does the Twin Paradox Illustrate Time Dilation in Relativity?
- blackwizard
- · Replies 3 ·
Graduate Do gravitons curve spacetime or travel through flat spacetime?
- bananan
- · Replies 4 ·
Graduate Equations of Motion with Covariant Derivatives and Momentum Density
- lokofer
- · Replies 2 ·
Undergrad Is Spacetime Curved by Gravity?
- Ace Nova
- · Replies 18 ·
Graduate How Does Relativity Explain Magnetic Fields from Moving Charges?
- Swapnil
- · Replies 9 ·
Graduate C - Speed of Light: Is Time Relative?
- Tzemach
- · Replies 7 ·
Graduate Can space-time rotations create time machines in General Relativity?
- lokofer
- · Replies 2 ·
Graduate Obtaining the Hamiltonian for Einstein's Lagrangian: A Wheeler-De Witt Approach
- eljose
- · Replies 1 ·
Graduate What are the limits of acceleration in special and general relativity?
- Donnie Darko
- · Replies 9 ·
Graduate Silly classical + relativity question.
- h4x
- · Replies 1 ·
Graduate Locality and non-locality in period measurement
- bernhard.rothenstein
- · Replies 2 ·