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
High School Time Dilation: Orbit Earth at Light Speed, What Happens?
- Drizy
- · Replies 8 ·
Undergrad How to call an invariant quantity?
- kent davidge
- · Replies 16 ·
Undergrad Transformation of Intrinsic Spin: Does it Transform Like a 4-Vector?
- Hiero
- · Replies 3 ·
High School Photon Frequency: How Special Relativity Affects Light
- akaSmith
- · Replies 23 ·
Undergrad How Does Hawking Radiation Lead to Black Hole Evaporation?
- docnet
- · Replies 8 ·
High School Speed of Light & Sound: Revolutionary Phenomenon?
- geordief
- · Replies 22 ·
High School Earth Center of Mass: GR & Inertial Object Acceleration
- Karl Coryat
- · Replies 8 ·
Undergrad The 1964 W. Bertozzi experiment
- avicenna
- · Replies 3 ·
Undergrad Observing Black Hole Collisions: Time Dilation Explained
- imsmooth
- · Replies 2 ·
High School Understand Spacelike Timelines: Carroll Page 71
- sqljunkey
- · Replies 3 ·
High School Light Clock & Length Contraction in GR
- sqljunkey
- · Replies 23 ·
High School Does E=mc^2 apply to gravitational potential energy?
- snoopies622
- · Replies 62 ·
High School Understanding Tensor Indices and Conservation
- etotheipi
- · Replies 9 ·
Undergrad Acceleration Frame in SR: References for Research
- Haorong Wu
- · Replies 4 ·
High School Gravitational Waves: A Question on Earth's Magnitude & Frequency
- roineust
- · Replies 24 ·
High School Photon Energy Change: Speed of Light
- danielhaish
- · Replies 4 ·
High School Gravitational Waves: Prevalence Across the Universe
- roineust
- · Replies 4 ·
High School Measuring Gravitational Waves w/ Elevator Accelerometer
- roineust
- · Replies 3 ·
High School Modern Cavendish vs LIGO: Gravity Scale & Wave Interruption?
- roineust
- · Replies 4 ·
Undergrad Understanding Michelson Morley Experiment
- Albertgauss
- · Replies 14 ·
High School Time Dilation & Length Contraction: Physics Explained
- xAceKing
- · Replies 3 ·
High School Gravitational Waves in Positively Curved Universe?
- tovisonnenberg
- · Replies 1 ·
Undergrad Equation for Gravity Going to Zero at Finite Distance?
- jaketodd
- · Replies 9 ·
Graduate Questions about derivation of GR and applications of it
- trees and plants
- · Replies 8 ·
High School Converting Newtonian momentum into relativistic momentum
- PainterGuy
- · Replies 28 ·
High School Help Interpreting SR Animation: Human-Scale Story
- Grinkle
- · Replies 12 ·
Undergrad Lorentz Force Equation: Coercion & Maxwell Stress Tensor
- goran d
- · Replies 11 ·
Undergrad Does Acceleration Affect Event Horizon Location?
- awardr
- · Replies 3 ·
Undergrad Event Horizon Radius: Is it Constant?
- DarkMattrHole
- · Replies 16 ·
High School How Does Parallel Transport Affect Vector Components and Their Changes?
- Shirish
- · Replies 24 ·
Undergrad Big Bang: Size & Matter of Universe Explained
- thegroundhog
- · Replies 5 ·
Undergrad Is space curved at the center of gravity?
- King Solomon
- · Replies 30 ·
Undergrad Twin Paradox Time Dilation in Positively Curved Universe
- Hiero
- · Replies 24 ·
Undergrad Understanding the Stress-Energy Tensor in Special Relativity
- fab13
- · Replies 4 ·
Undergrad Inertial & non-inertial frames & the principle of equivalence
- Frank Castle
- · Replies 122 ·
High School How does mass affect the curvature of spacetime inside a black hole?
- BillDennis
- · Replies 2 ·
Graduate Riemann Tensor Formula in Terms of Metric & Derivatives
- Jogging-Joe
- · Replies 5 ·
Undergrad Virtual Tidal Effect in Accelerating Ship - Does it Exist?
- DarkMattrHole
- · Replies 6 ·
Graduate Coordinate Infall Time for a Vaidya Black Hole
- Markus Hanke
- · Replies 46 ·
High School Do things that fall into black holes ever reach the singularity?
- docnet
- · Replies 11 ·
High School Speed of Light & Expanding Universe: Does Hubble's Law Violate Rule?
- docnet
- · Replies 15 ·
Undergrad Lorentz Transforms of Electromagnetic Fields
- Glenn Rowe
- · Replies 7 ·
High School Wormholes & Warp Drives: Refuted by AANEC?
- A Middle Aged Man
- · Replies 21 ·
Undergrad Why Do Objects Fall Along Spacetime Ripples?
- Lars1408
- · Replies 16 ·
Insights Learning Twin Paradox for Freely-Falling Observers
- vanhees71
- · Replies 2 ·
Undergrad A question about time dilation
- vector222
- · Replies 26 ·
Undergrad Relativistic Effect of Time Dilation: What is it Called?
- Gerinski
- · Replies 4 ·
High School Time Dilation: Direction of Motion's Effect
- Lars1408
- · Replies 8 ·
High School A thought experiment about the Sun vanishing
- Hamiltonian
- · Replies 12 ·
Undergrad Inquiry about a derivation in "A First Course in GR" by Schutz
- MathematicalPhysicist
- · Replies 13 ·
Undergrad Congruence vs Family of Worldlines: Taking Notes
- kent davidge
- · Replies 13 ·
Undergrad Spacetime distance between spacelike related events
- cianfa72
- · Replies 41 ·
High School Space & Time: How Are They Related?
- D0rk_L0rd
- · Replies 4 ·
Undergrad Lorentz Factor Variant: Derivation & Angle Dependence
- TheSurfers12
- · Replies 8 ·
Undergrad Compatibility of Determinism & CTC in General Relativity
- jk22
- · Replies 3 ·
High School Photon Speed: Does it Need a Reference?
- entropy1
- · Replies 22 ·
Undergrad Equivalence principle: an electric charge and a coil
- jcap
- · Replies 24 ·
Undergrad Twin Paradox Freely Falling Observers
- vanhees71
- · Replies 2 ·
Undergrad Lorentz transformation for derivatives
- Haorong Wu
- · Replies 14 ·
High School Gravity Inside a Hollow Sphere
- jayromano
- · Replies 8 ·
Undergrad Explore How Dropping Objects Into a Black Hole Changes It
- DrStupid
- · Replies 6 ·
High School Can You Experience Time and Decay While Falling Into a Black Hole?
- Matt204823545
- · Replies 14 ·
High School Special Relativity for Beginners: Clock Comparison
- docnet
- · Replies 9 ·
High School Particle Disintegration and Momentum Conservation in Relativity
- etotheipi
- · Replies 13 ·
Undergrad "Time is an illusion" according to Einstein
- Blub
- · Replies 11 ·
High School How Do Physicists Explain Black Hole Formation and Electromagnetic Repulsion?
- docnet
- · Replies 4 ·
Graduate Index-Free Expressions & Unique Metric-Compatible Connections
- Shirish
- · Replies 1 ·
High School What Happens to Time on a Clock at r=r_{s}/2 Inside a Schwarzschild Black Hole?
- snoopies622
- · Replies 11 ·
Undergrad The Twin Paradox implies that the Universe as a whole is a special frame
- jamesadrian
- · Replies 32 ·
Undergrad Orbits of Photons Around a Massball: Explained
- sqljunkey
- · Replies 17 ·
Undergrad Deriving Lorentz Transformations Using Calculus
- Ryder Rude
- · Replies 18 ·
Undergrad Apparent Violations of Principle of Relativity?
- BruceAW
- · Replies 2 ·
Undergrad A version of the twin paradox without accelerations
- George Plousos
- · Replies 67 ·
Undergrad Proving Antisymmetry of Electromagnetic Field Tensor with 4-Force
- Little Gravity
- · Replies 4 ·
Undergrad Does General Relativity explain inertia?
- jcap
- · Replies 38 ·
Undergrad Twin Paradox: Who Is Right, A or B?
- Will Flannery
- · Replies 137 ·
High School Detecting Gravitational Waves: Earth-Like Planet Possibility
- roineust
- · Replies 38 ·
High School How to select the smooth atlas to use for spacetime?
- Shirish
- · Replies 50 ·
Undergrad Thought Experiment Proving Newtonian Momentum Not Conserved
- quasar987
- · Replies 6 ·
Undergrad Spherically Symmetric Metric: Is Singularity Free?
- sqljunkey
- · Replies 3 ·
Undergrad Do moving massive objects drag curved spacetime with them?
- hnaghieh
- · Replies 74 ·
Undergrad Mass of the Moon and Gravitational Lensing
- Helena Wells
- · Replies 14 ·
Undergrad Gravitational Redshift: Units, Velocity & Ratio Explained
- Zman
- · Replies 5 ·
Undergrad Calculating Surface Area of Schwarzschild Black Hole w/Weyl Coordinates
- user1139
- · Replies 15 ·
Undergrad Size Limit of Accelerated Rigid Body in Irrotational Born Rigid Motion
- pervect
- · Replies 12 ·
High School Why is the speed of light a constant?
- greg_rack
- · Replies 29 ·
Undergrad The Physicist & Philosopher: Einstein vs. Bergson Debate
- bhobba
- · Replies 16 ·
High School General Relativity, Twins & Schopenhauer: Analyzing Timing Diff.
- rolling stone
- · Replies 18 ·
Undergrad Help Solve Twin Paradox Calc: A & B 1 Lyr Apart
- almarino dtd
- · Replies 1 ·
High School Potential Energy formula in Special Relativty
- Sagittarius A-Star
- · Replies 82 ·
Graduate Nonlocality Theorems & Relativity Principles
- jk22
- · Replies 1 ·
High School Space is Relative: A 17 Yr Old's Exploration
- greg_rack
- · Replies 5 ·
Undergrad Why Geodetic Equation Doesn't Accept Schwarzschild Solutions
- jk22
- · Replies 27 ·
Undergrad Twin Paradox Explained: No Math Required
- Mark1980
- · Replies 21 ·
High School Does Removing Planets Affect the Sun's Energy?
- sqljunkey
- · Replies 28 ·
High School Time, Space, Fields, Spacetime & General Relativity
- Immortal68
- · Replies 3 ·
Undergrad Distinguishing gravity from fictitious forces
- Hiero
- · Replies 17 ·
Undergrad About inertial reference frames and logical deduction
- cianfa72
- · Replies 26 ·
High School Gravity: How Does It Work & What Causes It?
- timeuser84
- · Replies 5 ·
Undergrad Gravity: A Fun Look - Any Bloopers?
- sophiecentaur
- · Replies 11 ·