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 Two Time Dimensions: Understanding the Possibilities & Problems
- ChrisVer
- · Replies 3 ·
Graduate How Does Relativity Affect Observations of Approaching Spaceships?
- JanEnClaesen
- · Replies 2 ·
Graduate What is the discrepancy between proper time and observed time in this scenario?
- s0ft
- · Replies 11 ·
Graduate Can an object be both inside and outside a black hole at the same time?
- mppharmacy
- · Replies 6 ·
Graduate Why photons can't go any slower than the speed of light?
- KatamariDamacy
- · Replies 74 ·
Graduate Covariant Derivative Wrt Superscript Sign: Explained
- cr7einstein
- · Replies 2 ·
Graduate Particle Accelerators: Why Opposing Streams?
- Vacant
- · Replies 4 ·
Graduate Thought experiment of Special relativity
- ta66505477
- · Replies 6 ·
Graduate White Hole Theory: Evidence in Our Universe
- jppmd
- · Replies 1 ·
Graduate Aerodynamics/Special Relativity Analogy
- jlefevre76
- · Replies 6 ·
Graduate The Einstein Maxwell Action with sources
- center o bass
- · Replies 1 ·
Graduate Do Black Holes become visible at relativistic speeds?
- tionis
- · Replies 41 ·
Graduate What is the explanation for the null result of the Michelson-Morley experiment?
- teodorakis
- · Replies 15 ·
Graduate Proper Distance: What is Relativistic Distance?
- HALON
- · Replies 8 ·
Graduate 2 charges and the speed of light
- abro
- · Replies 13 ·
Graduate Lorentz Transform of Radial & Longitudinal Dependent Magnetic Field
- matt_crouch
- · Replies 4 ·
Graduate Final state conjecture in general relativity?
- 21joanna12
- · Replies 2 ·
Graduate What is the difference between GR and classical deflection of light by the Sun?
- bobie
- · Replies 21 ·
Graduate How does muon time dilation explain the paradox of their journey to Earth?
- imsmooth
- · Replies 2 ·
Graduate On the question of experimental evdidence for 'real' SR time dilation?
- objecta99
- · Replies 16 ·
Graduate Why can't we determine our motion relative to spacetime?
- 21joanna12
- · Replies 8 ·
Graduate What is the role of the Earth's rotation in the Michelson-Morley experiment?
- abhilash.s
- · Replies 4 ·
Undergrad About time when you get closer to C
- sublime56
- · Replies 9 ·
Graduate Orbital Path Length Contraction: Explained by Relativity
- neilparker62
- · Replies 3 ·
Graduate New Formula for Hydrogen Spectral Lines Wavelengths/Frequencies
- neilparker62
- · Replies 1 ·
Graduate (What is) Schwarzschild Radius and Potential Energy
- Narroo
- · Replies 2 ·
Graduate Does Time Truly Exist and Can We Measure It Without Clocks?
- EEngineer91
- · Replies 21 ·
Graduate Why are time dilatation & length contraction infinite at light speed?
- tonyxon22
- · Replies 6 ·
Graduate What Explains the Discrepancies in Expanding Galaxy Rates?
- mugginsjr
- · Replies 2 ·
Graduate Relativity vs Quantum Mechanics: Understanding the Difference
- Bluecom
- · Replies 3 ·
Graduate Gravitational Wave Observatories: Testing & Feasibility
- gildomar
- · Replies 2 ·
Graduate Need help understanding Einstein's Light Clock experiment
- Deep_Thinker97
- · Replies 24 ·
Graduate Confusion on Einstein's Continuously Accelerating Rocket
- Schmonad
- · Replies 13 ·
Graduate How do maxwell's equations show that speed of light is constant
- Sreenath Skr
- · Replies 46 ·
Graduate Gravity Waves vs Elastic Sheet: Is the Analogy Productive?
- pervect
- · Replies 4 ·
Graduate Is Spacetime Fabric Truly 2D or Just a Visual Representation?
- Natsirt
- · Replies 14 ·
Graduate Infinite Acceleration, Conservation of Energy, and Negative Mass
- Raze
- · Replies 1 ·
Graduate Gravity force: Isn't it just the shape of space?
- chris4642
- · Replies 3 ·
Graduate Series expansion tetrad Fermi coordinates
- WannabeNewton
- · Replies 3 ·
Graduate Is the Stress-Energy Tensor for a Scalar Field Phi Isotropic in FRW Metrics?
- erogard
- · Replies 7 ·
Graduate Time Dilation with Two Spacecraft
- Art_Vandelay
- · Replies 3 ·
Graduate A rotating Hot Dog about an inertial observer
- HALON
- · Replies 21 ·
Graduate Why does spacetime warp around mass if it doesn't have mass?
- Natsirt
- · Replies 13 ·
Graduate Does mass dissipate in a black hole?
- Bengey
- · Replies 6 ·
Graduate Causailty and the speed of light
- Mark_Laverty
- · Replies 16 ·
Graduate Difference between "g" and "g^ij"
- pabugeater
- · Replies 8 ·
High School What is boost supposed to mean?
- ChrisVer
- · Replies 4 ·
Graduate Space Time Field: Effects of Mass & Orbit Equilibrium
- sambogrub
- · Replies 1 ·
Graduate Is Time Dilation Relative in Special Relativity Experiments?
- objecta99
- · Replies 61 ·
Graduate Black Holes and escape velocity
- willoughby
- · Replies 17 ·
Graduate Does Einstein's General Theory of Relativity imply graviton?
- sujoykroy
- · Replies 3 ·
Graduate Atomic Vibrations & Time Dilation: The Reality Behind Our Perception
- cperkins
- · Replies 12 ·
Graduate How does relativity define time (as a constant or not?)
- amarshalltd
- · Replies 41 ·
Graduate Intuitive description of what the Ricci tensor & scalar represent?
- andrewkirk
- · Replies 5 ·
Graduate A few questions about Einstein's field equations
- space-time
- · Replies 2 ·
Undergrad Forces with Constant Velocities: Formulas & More
- ghost313
- · Replies 2 ·
Graduate Are There Exact Black Hole Solutions in Non-Asymptotically Flat Spacetimes?
- old dog
- · Replies 3 ·
Graduate Derivation of Velocity from Acceleration in Special Relativity
- ecastro
- · Replies 6 ·
Graduate What happens if there is no singularity inside a black hole?
- countzero1984
- · Replies 11 ·
Graduate 1st stress-energy tensor component for an electric field
- space-time
- · Replies 4 ·
Graduate Constructing the electromagnetic tensor from a four-potential
- coleman123
- · Replies 8 ·
Undergrad Relativity of velocity entails equal velocity
- objecta99
- · Replies 19 ·
Graduate Understanding One Forms in General Relativity: A Beginner's Guide
- resurgance2001
- · Replies 1 ·
Undergrad Deriving the displacement of an object
- Solibelus
- · Replies 2 ·
Graduate Mastering GTR to Tackling Problems on Curved Space
- Ravi Mohan
- · Replies 3 ·
Graduate Does the Speed of Light Remain Constant in All Scenarios?
- etcota
- · Replies 3 ·
Graduate Gravitational Time Dilation and Age of Astronaut
- sangan
- · Replies 16 ·
High School Understanding Spacetime Curvature: Explained
- Phy_enthusiast
- · Replies 13 ·
Game to help see visual effects of SR
- guitarphysics
- · Replies 3 ·
Graduate Time dialation effect on observed speed of light
- rcgldr
- · Replies 2 ·
Graduate Inside event horizon, space and time are reversed. How, precisely ?
- nomadreid
- · Replies 9 ·
Graduate Is the B-theory of Time Presupposed by Relativity?
- kq6up
- · Replies 2 ·
Graduate Time dilation measurement and events
- fog37
- · Replies 7 ·
Graduate Poking someone falling into a black hole with a stick
- RabbitWho
- · Replies 8 ·
Graduate Can non-compact 4-dimensional spacetimes have a global tetrad?
- befj0001
- · Replies 8 ·
Graduate Exotic stress-energy tensor and causality
- Irigi
- · Replies 5 ·
Graduate Gravity and time and space translation asymmetry
- e2m2a
- · Replies 6 ·
Graduate Variation of the Einstein-Hilbert action in noncoordinate basis
- center o bass
- · Replies 4 ·
Undergrad Is gravity's speed really the speed of light?
- Veridian
- · Replies 10 ·
Graduate Need help with a special relativity problem
- thetrice
- · Replies 7 ·
Graduate Time and General Relativity help?
- electronicmatt
- · Replies 26 ·
Graduate Why does light have a finite speed?
- adoion
- · Replies 46 ·
Graduate What is one way speed of light is about? Why is it said undefined?
- Sreenath Skr
- · Replies 8 ·
Graduate How Does Fermi-Walker Transport Behave in Rotating Space-Times?
- WannabeNewton
- · Replies 5 ·
Graduate Is the Metric in Spherical Coordinates Truly Flat?
- Mr-R
- · Replies 9 ·
Graduate Problem analyzing rod-slot 2-D Lorentz contraction paradox
- nixed
- · Replies 12 ·
Graduate Inaccuracy in the speed of light
- RyanXXVI
- · Replies 30 ·
Graduate Current 3-form, current density, current vector, etc.
- Geometry_dude
- · Replies 4 ·
Graduate Train Stopping Time: Different Observers, Different Times?
- adelmakram
- · Replies 94 ·
Graduate Can any pair of spacelike events be simultaneous?
- johnny_bohnny
- · Replies 16 ·
Undergrad Question about gravity's effect on moving bodies
- Veridian
- · Replies 3 ·
Graduate Why is theory of Gravity and QM incompatible?
- Imafungi
- · Replies 26 ·
Graduate Does the relativity of simultaneity exist 'at a distance'?
- JTT10
- · Replies 10 ·
Undergrad How did Einstein come to the Conclusion of Spacetime?
- TimeInquirer
- · Replies 1 ·
Graduate An Apparent Contradiction in General Relativity?
- Juan Largo
- · Replies 35 ·
Graduate From local symmetry to General Relativity
- quangtu123
- · Replies 7 ·
Graduate Map Taking Proper Time to Euclidean Length
- Psychosmurf
- · Replies 11 ·
Graduate Minkowski Metric: Exploring Components and Deriving in 4D Coordinates
- space-time
- · Replies 12 ·
Graduate Are Solutions to GR Field Equations Chaotic?
- Juan Largo
- · Replies 3 ·
Undergrad Question about gravitational attraction
- RandomDude
- · Replies 6 ·