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 Why the square-root of the metric
- stevendaryl
- · Replies 3 ·
Graduate The relationship between Stress-Energy tensor and Mass
- ShayanJ
- · Replies 8 ·
Graduate The Invariance Principle: Understanding the Essence of Special Relativity
- Master J
- · Replies 6 ·
Graduate Deriving a Minkowski Force Matrix: Exploring 4-force
- 71GA
- · Replies 4 ·
Graduate Is Your Thought Experiment on General Relativity Foundations Valid?
- cosmic dust
- · Replies 1 ·
Graduate What is the current physics consensus on block time and the block universe?
- I2004
- · Replies 1 ·
Graduate Flat vs. Conformally Flat Spacetime
- Airsteve0
- · Replies 2 ·
Graduate Why is the linearized vierbein a 2nd rank tensor in flat spacetime?
- DrDu
- · Replies 9 ·
Graduate Solving the Critical Radius for Relativity: Find krE!
- n1caboose
- · Replies 1 ·
Graduate Does observer's sense of gravity change?
- tanus5
- · Replies 5 ·
Graduate What's the difference between apparent horizon and event horizon?
- xuphys
- · Replies 2 ·
Undergrad What happens during acceleration in twin paradox?
- vraeleragon
- · Replies 11 ·
Graduate Understanding Tensor Bases: Solving Equations in General Relativity
- illuminatus33
- · Replies 3 ·
Graduate How does time expansion/contraction work for opposite moving observers?
- randyu
- · Replies 6 ·
Graduate Derivation of lorentz transformation?
- Aziza
- · Replies 6 ·
Graduate How Does Time Dilation Affect Perception in Space Travel?
- mcafej
- · Replies 1 ·
Graduate Are Finkelstein/Kruskal Black Hole Solutions Compatible with Einstein's GR?
- harrylin
- · Replies 124 ·
Graduate What Are the Implications of Nikodem Poplawski's ECSK Gravity Theory?
- pervect
- · Replies 3 ·
Graduate Some doubts concerning the mathematical bases of GR
- TrickyDicky
- · Replies 149 ·
Graduate Unfortunate Doppler Discussion in Nice Paper
- PAllen
- · Replies 1 ·
Graduate Why is there no factor of 4 in the variation of Riemann squared action?
- sergenyalcin
- · Replies 5 ·
Graduate Is relative mass making gravitational field?
- marshallaw
- · Replies 8 ·
Graduate Lorentz transformation of y cpmponent for 4-momentum
- 71GA
- · Replies 16 ·
Undergrad Mass causes space time curvature
- shounakbhatta
- · Replies 24 ·
Graduate Space-time can mean without mater or energy ?
- big_bounce
- · Replies 10 ·
Graduate Different speed of light at different milky way radius?
- Juanma
- · Replies 2 ·
Graduate Solve relativistic velocity in terms of momentum (vector equation)
- winstonyin
- · Replies 1 ·
Graduate FRW Model Q: Why Does Positive (ρ+3p) Prove Big Bang?
- Auburnman
- · Replies 2 ·
Graduate Motivation behind vacuum Einstein equation
- McLaren Rulez
- · Replies 8 ·
Graduate Does Accelerated Electron Emit Gravitational Radiation?
- nos
- · Replies 16 ·
Graduate The light clock and the simple clock
- vinven7
- · Replies 20 ·
Graduate Closed Dimensions: Metric Tensor, Curvature & Time
- thehangedman
- · Replies 4 ·
Graduate Mass of a Boxful of Extremely Intense Radiation
- Islam Hassan
- · Replies 10 ·
Graduate Rotation and Revolution in relativity
- arindamsinha
- · Replies 16 ·
Graduate Does rotation of a 3d volume about a 2d plane create gravity?
- Sunfire
- · Replies 8 ·
Graduate Evaluating time for falling body to reach event horizon
- ck99
- · Replies 8 ·
Graduate What Are the Paradoxes of the Light Clock Problem in Special Relativity?
- altergnostic
- · Replies 165 ·
Graduate Metric Tensor Division: Is It Proper?
- redstone
- · Replies 2 ·
Graduate Exact Solutions to General Relativity & Einstein's Field Eqns.
- shounakbhatta
- · Replies 5 ·
Graduate Does an Electron's Increased B Field Exist Outside a Black Hole's Event Horizon?
- cragar
- · Replies 1 ·
Graduate Test of GR's increase of inertia near bodies?
- harrylin
- · Replies 12 ·
Graduate Does the universe act like an instanced computer model
- ExecNight
- · Replies 2 ·
Graduate Time dilation effects of relative velocity vs gravitational force?
- Fredster1765
- · Replies 20 ·
Graduate Speed of time immediately after big bang relative to now?
- Ipm
- · Replies 32 ·
Graduate Two seemingly unrelated arguments against superposition in GR
- bcrowell
- · Replies 15 ·
Graduate Frames vs Coordinates: Mapping Points in R4 to Events in Manifold
- Dale
- · Replies 13 ·
Graduate Size of Black Holes: A Closer Look
- jaydnul
- · Replies 30 ·
Graduate Oppenheimer-Snyder model of star collapse
- TrickyDicky
- · Replies 140 ·
Undergrad Understanding Light Clock & Time Dilation
- Shark 774
- · Replies 8 ·
Graduate How Do Rindler Coordinates Affect Time Dilation and Acceleration?
- zonde
- · Replies 33 ·
Graduate Temperature , tensors, and the unruh effect
- pervect
- · Replies 6 ·
Graduate Is the speed of light always 299 792 458 m / s
- Bjarne
- · Replies 36 ·
Graduate Pertinent question regarding time traveling
- Calabi_Yau
- · Replies 1 ·
Graduate Some questions about general relativity
- faen
- · Replies 24 ·
Graduate What is an alternate way of representing special relativity?
- Davidthefat
- · Replies 4 ·
Graduate Implications of Time-reversal asymmetric quantum physics
- Schneibster
- · Replies 3 ·
Graduate Why is a Blue Shift in Kruskal Szekeres not Physical
- Airsteve0
- · Replies 3 ·
Graduate Black hole event horizon radius = Schwarzschild radius?
- arindamsinha
- · Replies 7 ·
Graduate How observation of a distant galaxy changes when travelling towards it
- doudou1910
- · Replies 38 ·
High School Equations for relative velocity
- UglyNakedGuy
- · Replies 4 ·
Graduate What Does Einstein's Unification of Space and Time Mean?
- sreerajt
- · Replies 8 ·
Graduate Expansion and acceleration of the Universe
- nicholasmath
- · Replies 4 ·
Graduate Black holes and General Relativity
- Snaar
- · Replies 2 ·
Graduate How Do Horizons Influence the Entropy and Temperature of Spacetime?
- pervect
- · Replies 6 ·
Graduate How does one measure the absolute velocity of an object?
- Sydney Self
- · Replies 43 ·
Graduate The Mystery of Super Luminous Entities and Relativistic Insects Explained
- Mr-T
- · Replies 19 ·
Undergrad Is the speed of light affected by relative motion?
- paras02
- · Replies 4 ·
Graduate Shape of Kerr event horizon in terms of reduced circumference
- granth
- · Replies 7 ·
Graduate Showing that Lorentz transformations are the only ones possible
- bob900
- · Replies 125 ·
Graduate Why are geodesics parabolae on earth's surface?
- bluekuma
- · Replies 5 ·
Graduate Einstein's GR & Rotating Earth Dilemma
- leo nardo
- · Replies 3 ·
Graduate Black Hole Angular Velocity: Is Expansion Feasible?
- serp777
- · Replies 1 ·
Graduate Geodesics in a constant gravitational field
- tom.stoer
- · Replies 12 ·
Graduate Time & Universe: Relative Meaning & Age
- ubcstudent
- · Replies 4 ·
Graduate Why does the buoyant force decrease in Supplee's submarine paradox?
- bcrowell
- · Replies 25 ·
Graduate What is the measure of space-time curvature and how is it calculated?
- Gingermolloy
- · Replies 6 ·
Graduate How to understand why massless particles must travel at c?
- SecretSnow
- · Replies 13 ·
High School Mass and velocity, thank you for your help
- UglyNakedGuy
- · Replies 6 ·
Graduate If light appears frozen due to time dilation, how do its fields fluctuate?
- d3mm
- · Replies 7 ·
Graduate About accretion disk of a binary system
- jtceleron
- · Replies 3 ·
Graduate A function for a line in a square (or a triangle or a etc)
- geordief
- · Replies 3 ·
Graduate What events occur inside a black hole?
- F1225
- · Replies 13 ·
Graduate Question about transverese-traceless gauge in gravity
- Neitrino
- · Replies 2 ·
Graduate Velocity Addition in Special Relativity
- rajark
- · Replies 2 ·
Graduate Can Black Holes Truly 'Grow' in the Lifetime of the Universe?
- arindamsinha
- · Replies 83 ·
Graduate Inventing Lagrangians (D'Inverno)
- TerryW
- · Replies 3 ·
Graduate What Would Audible Gravity Waves Sound Like?
- snorkack
- · Replies 2 ·
Graduate (wald) method for calculating curvature
- nulliusinverb
- · Replies 3 ·
Graduate Can you move fast enough towards light so that it has a period of 0?
- stu dent
- · Replies 2 ·
Undergrad Perpetual Acceleration: Questions for Beginners
- Gingermolloy
- · Replies 7 ·
Graduate Gravitation Lagrangian in classical form
- Barnak
- · Replies 5 ·
Graduate How to calculate increase of mass in relation to increase in velocity?
- stu dent
- · Replies 2 ·
Graduate Conservation of Particle Number
- thehangedman
- · Replies 8 ·
Graduate Trajectory function of projectile motion
- Arroway
- · Replies 2 ·
Graduate Co-variant Derivative of a Complex Vector
- thehangedman
- · Replies 1 ·
Graduate Symmetrizing 3xMetric Tensor: H^{\mu \nu \lambda \kappa \rho \sigma}
- Barnak
- · Replies 1 ·
Graduate Why Do Objects Fall if Gravity Isn't a Force in General Relativity?
- dchartier
- · Replies 16 ·
Graduate What is the mechanism behind the weight of a box of photons?
- Austin0
- · Replies 32 ·
Graduate Does light aimed outward contribute to the pull of space-time in black holes?
- stevenx
- · Replies 9 ·
Graduate Life below the Schwarzschild radius
- JeroenDeDauw
- · Replies 23 ·