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 Gravitational time dilation, how much?
- Erland
- · Replies 30 ·
Graduate Giancoli 6th ed. conflates spatial and spacetime curvature in GR chapter
- bcrowell
- · Replies 11 ·
Graduate Conserved quantities for massless particles (Schwarzschild)
- astrolollo
- · Replies 15 ·
Graduate Newton's 2nd law for Massless Particles in SR
- andresB
- · Replies 12 ·
Graduate Two-mass Schwarzschild metric instead of Kerr metric?
- Rlam90
- · Replies 14 ·
Graduate Simultaneity: how can all observers be right?
- DAC
- · Replies 16 ·
Graduate How is the Einstein field equation converted to its tensor form?
- TimeRip496
- · Replies 1 ·
Undergrad E=mc^2 how you picture it in nature?
- Tom Minogue Hastings
- · Replies 7 ·
Graduate Accelerating or Decelerating Universe Expansion?
- Ontophobe
- · Replies 5 ·
Undergrad Does length contraction disappear when a fast-moving rod comes to rest?
- Bertrand Boucquillon
- · Replies 31 ·
Graduate Will a Photon Clock Tick Faster or Slower When Moving Towards You?
- Iconoclast
- · Replies 8 ·
Graduate Question regarding GR wrt potential energy
- Buzz Bloom
- · Replies 63 ·
Graduate Does a photon's mass change if it slows down?
- zainalinaeem
- · Replies 4 ·
Undergrad Why does Alice see Bob's time slow, but Bob ages faster in the twin paradox?
- AYYYLAMOOOO
- · Replies 12 ·
Undergrad Are frames of reference with different origins distinct?
- fog37
- · Replies 1 ·
Graduate Lorentz invariance of the Minkowski metric
- "Don't panic!"
- · Replies 24 ·
Graduate Does the de Broglie relation account for relativistic length contraction?
- Anton Alice
- · Replies 2 ·
Graduate Photon Orbit Around a Black Hole: Conservation Law Effects
- Ontophobe
- · Replies 3 ·
Graduate Four Indistinguishable Phenomena?
- Ontophobe
- · Replies 5 ·
Graduate Is Lorentz invariance is true in curved spacetime?
- kroni
- · Replies 4 ·
Undergrad E=MC^2 - easy explanation for kids
- Tom Minogue Hastings
- · Replies 23 ·
Undergrad Can gravatational force only influence objects with energy?
- dawningparadox
- · Replies 8 ·
Graduate Spacetime Interval: Is (Δs)2 = (ct)2/γ2 a Coincidence?
- Battlemage!
- · Replies 2 ·
Graduate Why does E=mc² work if all motion is relative?
- Dan248
- · Replies 25 ·
Graduate Can superluminal energy transport in light pulses violate relativity?
- PFfan01
- · Replies 7 ·
Graduate Phonon Lorentz Invariance in Superfluids - Papers?
- philton
- · Replies 3 ·
Graduate How was the Minkowski metric derived in special relativity?
- Emilie.Jung
- · Replies 1 ·
Graduate What are the postulates of general relativity?
- A AM ARYA
- · Replies 10 ·
Graduate Equivalence of formulas for time reduction factors in GR
- Dema
- · Replies 24 ·
Graduate Einstein's Solution to the PDE for Tau in 1905 SR Paper
- DoobleD
- · Replies 4 ·
Graduate How does the doppler effect resolve the twin paradox?
- Dennydont
- · Replies 4 ·
Undergrad Transformations in higher dimensions
- Rahma Al-Farsy
- · Replies 9 ·
Graduate FTL: Is Faster-than-Light Information Relocation Theoretically Possible?
- martix
- · Replies 1 ·
Graduate Do Photons Challenge the Concepts of Mass and Energy in Physics?
- Molar
- · Replies 4 ·
Graduate What happens if a starship near light speed enters a black hole?
- Enjamiering
- · Replies 4 ·
Undergrad Vertical Interferometer Experiments: Michelson-Morley, Miller, etc.
- jeremyfiennes
- · Replies 5 ·
Graduate What dimension does space-time curve in?
- Ez4u2cit
- · Replies 32 ·
High School Is spacetime just a mathematical trick or is it the actual physical reality?
- DoobleD
- · Replies 41 ·
Graduate Does Stress-Energy Tensor Depend on Direction of Relative Velocity?
- James Nelson
- · Replies 4 ·
Graduate What causes the warping of spacetime?
- gravityquantum11
- · Replies 3 ·
Graduate Finding F from Bi = 1/2 εijk Fjk
- StuartY
- · Replies 4 ·
Graduate Einstein tensor of a gravitational source
- CharlesJQuarra
- · Replies 16 ·
Graduate Interstellar travel and Special Relativity
- ThomasLLS
- · Replies 16 ·
Graduate Velocity-Based Time Dilation: Teen's $400k Video Correct?
- Menbailee
- · Replies 1 ·
Graduate Would gravitational waves follow different laws in a multidimensional spacetime?
- Guthrie Prentice
- · Replies 1 ·
Undergrad Do photons traveling the same direction ever pass each other?
- stever
- · Replies 30 ·
Graduate Time dilation paradox: why does the universe age fast if the traveler sees it frozen?
- DaveC426913
- · Replies 9 ·
Graduate Why pseudo-Riemannian metric cannot define a topology?
- victorvmotti
- · Replies 21 ·
Undergrad Wrong Block Theory of Time Description: Evaluate It
- Heidegger1
- · Replies 2 ·
Graduate Relation between electromagnetism and relativity
- entropy1
- · Replies 16 ·
Graduate Basic Questions on Special Theory of Relativity
- Sailark
- · Replies 11 ·
Graduate Components of The Electromagnetic Field Strength Tensor
- darida
- · Replies 5 ·
Graduate Imaginary Transverse Space of Superluminal Lorentz Transform
- greswd
- · Replies 6 ·
Undergrad Questions about time dilation, special relativity, etc.
- MX Maniac
- · Replies 20 ·
Graduate Is Our Future Already Determined by the Laws of Physics?
- Iconoclast
- · Replies 13 ·
Graduate How do nonlinear effects in GR challenge the mass-volume-density equation?
- Buzz Bloom
- · Replies 11 ·
Graduate How many ways there are to conclude that Eo=mc^2 ?
- sami_m
- · Replies 43 ·
Graduate Varying The Gibbons-Hawking Term
- adsquestion
- · Replies 1 ·
Undergrad Inertial Frame of Reference vs Spacetime
- Pjpic
- · Replies 6 ·
Graduate How Does Doppler Shift Affect Light From a Shuttle to a Mother Ship in Space?
- Buckethead
- · Replies 5 ·
Graduate Grasping the Properties of Minkowski Space
- Boon
- · Replies 4 ·
Graduate Are SR effects caused by spacetime distortion?
- alw34
- · Replies 18 ·
Graduate Does space contraction affect planet evolution?
- burashka5719
- · Replies 6 ·
Graduate Global casual structure of space-time, well-behaved function
- dhalilsim
- · Replies 5 ·
Undergrad The relationship between F=ma and E=mc2
- Starlover
- · Replies 5 ·
Undergrad How do tachyons derive their properties if they travel faster than light?
- greswd
- · Replies 1 ·
Undergrad How does the time dilation equation work?
- Isaac0427
- · Replies 23 ·
Graduate Conservation of Energy and General Relativity
- physicsquantum
- · Replies 2 ·
Graduate Schwarz Inequality is your friend
- samalkhaiat
- · Replies 12 ·
Graduate What Surface Do Null Rays Form in a Modified Minkowski Space?
- adsquestion
- · Replies 5 ·
Undergrad Does length contraction explain why only the traveling twin ages less?
- fxfocus
- · Replies 14 ·
Graduate Number of wheel rotations relativistic car
- lightarrow
- · Replies 38 ·
Graduate Do gravitational fields change light frequency in lensing?
- flexible_time
- · Replies 11 ·
Graduate Are Cosmological & Universal Constants the Same?
- Starlover
- · Replies 9 ·
Undergrad How does mass bend space-time and why does this contradict Newton's gravity?
- themagician
- · Replies 8 ·
Graduate Notation difficulties with metric and four vector
- tomwilliam2
- · Replies 6 ·
Graduate What Defines Future-Directed Vectors in Physics?
- Einj
- · Replies 5 ·
Graduate Witness Life of Universe from Black Hole Event Horizon
- Ping
- · Replies 3 ·
High School Gravitational Field Strength of Bodies Exceeding c
- Einstein's Cat
- · Replies 1 ·
Graduate What happens to someone falling into a supermassive black hole?
- serp777
- · Replies 1 ·
Graduate Why does the AdS₃ hyperboloid intersected with a plane give an ellipse?
- adsquestion
- · Replies 1 ·
Graduate Why Do the Terms in the Lagrangian Action Have the Same Dimension?
- shadishacker
- · Replies 5 ·
High School Is the drunk person's frame valid in galilean relativity?
- Alpharup
- · Replies 11 ·
Graduate What is the experimental evidence for mass relativity?
- James Nelson
- · Replies 17 ·
Graduate Time Dilation for Interplanetary Migration: Can We Go?
- SharkySharp
- · Replies 4 ·
Undergrad Can Emergent Spacetime Concepts Enable Faster-Than-Light Travel?
- jlcd
- · Replies 1 ·
High School Explaining time dilation to friends without mathematics
- TLR
- · Replies 24 ·
Undergrad Mass Energy Equivalence Equation
- anthonyvigh
- · Replies 24 ·
Graduate Analysis of Train in Tunnel Problem Using an AND Gate
- Alfred Cann
- · Replies 7 ·
Graduate Preparing to study Einstein's field equations with an engineering background
- JiT
- · Replies 6 ·
Graduate Interesting Effect of Conformal Compactification on Geodesic
- adsquestion
- · Replies 10 ·
Graduate Proving Spin Coefficient Transformation for Null Rotation with l Fixed
- Ravi Panchal
- · Replies 1 ·
Graduate Relationship Between Spatial Expansion and Gravity's Force?
- jpescarcega
- · Replies 13 ·
Graduate Interesting applications of relativistic angular momentum?
- bcrowell
- · Replies 12 ·
Graduate Gravitational Stress: Source of Energy for Orbiting Bodies
- T S Bailey
- · Replies 2 ·
Graduate Deriving Lorentz transformations
- abhinavjeet
- · Replies 78 ·
Undergrad Is the relativity of simultaneity the reason for time dilation?
- MachPrincipe
- · Replies 8 ·
Graduate Riemannian Penrose Inequality: Proof Restriction to n=3?
- Sasha_Tw
- · Replies 5 ·
Graduate What was the explanation of OPERA superluminal neutrinos?
- MachPrincipe
- · Replies 14 ·
Graduate Why does length contraction solve this? (2 Lightclocks)
- kablion
- · Replies 9 ·