Special and General Relativity Forum

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 What is the perception of mass compression during relative time in acceleration?

  • duordi
  • · Replies 12 ·
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12

Graduate Invariance of uxw (velocityxphase velocity)

  • bernhard.rothenstein
  • · Replies 9 ·
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9

Graduate Linear algebra and tensors in GR

  • quasar_4
  • · Replies 1 ·
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1

Visser: Lorentzian wormholes. From Einstein to Hawking 1996

  • MeJennifer
  • · Replies 2 ·
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2

Undergrad A complete course in relativity.

  • Ragnar
  • · Replies 30 ·
2
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30

Graduate Gravitational radiation reaction

  • JustinLevy
  • · Replies 1 ·
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1

Graduate Simultaneity, contraction and interval.

  • Angelos
  • · Replies 11 ·
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11

Graduate Earth-Based Gravity Wave Detectors: Exist, Effectiveness, Detection & Setup

  • RJ Emery
  • · Replies 12 ·
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12

Graduate Relative No-emission Propulsion

  • aspagnito
  • · Replies 5 ·
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5

Undergrad Principle of Relativity violation

  • haroldholt
  • · Replies 9 ·
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9

Graduate How Can We Determine If Two Light Beams Are Emitted Simultaneously?

  • Zeit
  • · Replies 5 ·
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5

Graduate Location of new mass when added to grav system

  • Steve Harris
  • · Replies 6 ·
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6

Graduate Calculating Light Bending by Gravity: Can You Teach Me?

  • hover
  • · Replies 23 ·
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23

Graduate Whether a person will die or not is relative

  • ahamster
  • · Replies 16 ·
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16

High School Uncovering the Mystery of Photons, Mass, and Gravity for Beginners

  • Dave0101
  • · Replies 11 ·
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11

Undergrad Relativity Question: Length Contraction of Moving Boxes

  • kuahji
  • · Replies 1 ·
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1

Graduate Does Gravity Instantaneously Disappear When a Massive Object Vanishes?

  • K.J.Healey
  • · Replies 20 ·
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20

Undergrad Does Weight Change with Reference Frame? A Question Explored

  • lightarrow
  • · Replies 4 ·
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4

Graduate Does the Gravitational Field Have Mass?

  • magnetar
  • · Replies 5 ·
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5

Graduate Lorentz-Transformation and time

  • Kruger
  • · Replies 12 ·
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12

Graduate Is a Photon a Point or an Energy?

  • fireball3004
  • · Replies 5 ·
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5

Graduate Why C in Vacuum? Time Dilation Formula Explained

  • Ragnar
  • · Replies 43 ·
2
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43

Graduate Link btw manifolds and space-time

  • quasar987
  • · Replies 99 ·
4
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99

Graduate How Would Headlights Behave If Your Car Traveled Faster Than Light?

  • beemaa
  • · Replies 23 ·
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23

Graduate Twin Paradox in 3-sphere (S^3)

  • KingOrdo
  • · Replies 117 ·
4
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117

Graduate What Does It Mean When We Say Spacetime Is Curved?

  • jimbobjames
  • · Replies 11 ·
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11

Graduate What Does \nabla_{[a}F_{bc]} Mean? Notation Question Answered!

  • cristo
  • · Replies 4 ·
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4

Graduate Questions about kinetic energy and gravitation

  • Zeit
  • · Replies 3 ·
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3

Graduate Time elapsed for watch with crystal normal or parallel to g

  • Loren Booda
  • · Replies 3 ·
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3

Graduate Concept of the constant speed of light

  • DocZaius
  • · Replies 9 ·
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9

High School The Speed of Light: If My Arms Were 10 Light Years Long

  • Physics1
  • · Replies 10 ·
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10
  • Poll Poll

Undergrad A simple observation regarding the equivalence of acceleration and gravity

  • girlwonder
  • · Replies 54 ·
2
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54

Graduate Photons in the stationary wave?

  • bernhard.rothenstein
  • · Replies 5 ·
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5

Graduate Speed of Light Sucked into Black Hole

  • Thunder Foot
  • · Replies 14 ·
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14

Undergrad Experiencing time faster rathe than slower

  • jobodabohobo
  • · Replies 3 ·
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3

Graduate Is Time a Vector, Scalar, or Something Else Entirely?

  • unscientific
  • · Replies 5 ·
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5

Graduate Curvature and Geodesics in Space-Time: A Question on Photon Paths

  • MeJennifer
  • · Replies 16 ·
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16

Undergrad Does every piece of information in the universe have mass?

  • MaNiFeST
  • · Replies 8 ·
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8

Graduate Stupid question about page 70 in a first course in GR

  • Terilien
  • · Replies 26 ·
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26

Graduate How can we accurately measure the relative velocity between two moving bodies?

  • anantchowdhary
  • · Replies 39 ·
2
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39

Graduate Near Light Velocity: Can Distances Shorten & Universe Appear Flattened?

  • duordi
  • · Replies 6 ·
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6

Graduate Global Positioning System and Relativity

  • Thomas2
  • · Replies 17 ·
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17

Graduate Question on Penrose diagram for Schwazschild metric

  • alphaone
  • · Replies 9 ·
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9

Undergrad Can a Michelson Interferometer Detect Gravitational Waves on a Small Scale?

  • Dr.Brain
  • · Replies 3 ·
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3

Graduate A possible question concerning the photon

  • bernhard.rothenstein
  • · Replies 30 ·
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Graduate The curvature cause by gravity implies absolute space?

  • MathematicalPhysicist
  • · Replies 19 ·
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19

Graduate Is there a maximum doppler shift?

  • ktoz
  • · Replies 11 ·
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11

Graduate Physical Interactions over Great Distances

  • SeaDour
  • · Replies 4 ·
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4

Undergrad Is Matter Simply a Form of Energy?

  • energy
  • · Replies 54 ·
2
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Graduate Relativity of Simultaneity and Length Contraction in Observing Lightning Strikes

  • FossilFew
  • · Replies 8 ·
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8

Graduate Is it Possible to Determine the Temperature of Space-Time?

  • Jonny_trigonometry
  • · Replies 4 ·
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4

Undergrad Spacetime and problem of 4th dimesion.

  • Angelos
  • · Replies 8 ·
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8

Graduate Does the Rod Appear Shorter to Person A When Travelling Near c?

  • anantchowdhary
  • · Replies 16 ·
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16

Graduate Energy-momentum conservation equation

  • cristo
  • · Replies 1 ·
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1

Graduate Lorentz transformation and lorentz-Einstein transformations

  • bernhard.rothenstein
  • · Replies 1 ·
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1

Graduate The Lorentz Transformations and vector components

  • anantchowdhary
  • · Replies 23 ·
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23

Graduate Killing's equation from infinitesimal transformation

  • cristo
  • · Replies 9 ·
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9

Graduate Einstein Hilbert Action

  • inneed
  • · Replies 13 ·
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13

Graduate Killing vector in kruskal coordinates

  • cristo
  • · Replies 4 ·
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4
  • Poll Poll

Sign Conventions: A Cultural Study

  • Thrice
  • · Replies 17 ·
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17

Graduate Is space infinitely divisible?

  • ktoz
  • · Replies 2 ·
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2

Undergrad The Length of Pendulum Strings: Motion Effects

  • anantchowdhary
  • · Replies 9 ·
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9

Undergrad Understanding Time Dilation in Special Relativity

  • Sculptured
  • · Replies 9 ·
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9

Graduate Relativistic addition of velocities without lorentz transformations

  • bernhard.rothenstein
  • · Replies 4 ·
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4

Graduate Gravitational Wave Detection Project Help

  • Dr.Brain
  • · Replies 1 ·
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1

Undergrad Dynamic Mass of Photon: E=mc^2 & hv

  • DonnieD
  • · Replies 76 ·
3
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Undergrad Is Space Infinitely Divisible?

  • snap360
  • · Replies 9 ·
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9

Undergrad Does Space Have Mass According to Einstein's Theory?

  • ktoz
  • · Replies 8 ·
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8

Graduate Three symbols i can never understand in relativity tesbooks

  • Terilien
  • · Replies 7 ·
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7

Graduate Gravito-Electro-Magnetism problem

  • JustinLevy
  • · Replies 3 ·
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3

Undergrad Can Gravity Near a Black Hole Allow Time Travel?

  • phintastic
  • · Replies 3 ·
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3

Graduate How Can the Principle of Extremal Aging Be Demonstrated?

  • Terilien
  • · Replies 1 ·
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1

Undergrad Maybe im onto something or i dont have a clue what im on ablout

  • superstonerman
  • · Replies 20 ·
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20

Graduate Double gravitational potential energy paradox

  • Jonathan Scott
  • · Replies 22 ·
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22

Graduate Have absolute gravitational singularities ever formed?

  • Loren Booda
  • · Replies 1 ·
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1

Undergrad Square Root in Special Relativity

  • grounded
  • · Replies 6 ·
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6

Graduate What is Alice Law's unique take on gravity and relativity?

  • hover
  • · Replies 1 ·
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1

Graduate Special and general relativity resources

  • Terilien
  • · Replies 12 ·
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12

Graduate If an observer accelerates he must rotate in space-time?

  • MeJennifer
  • · Replies 18 ·
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18

Graduate Redshift/blueshift and time dilation

  • Quantumgravity
  • · Replies 8 ·
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8

Graduate Is the momentum of a massive particle traveling at the speed of light zero?

  • RAD4921
  • · Replies 11 ·
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11

Graduate What is Special Relativity based upon?

  • arcnets2
  • · Replies 13 ·
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13

Graduate Transformation equations presented in a different way

  • bernhard.rothenstein
  • · Replies 11 ·
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11

Graduate Problem understanding relativistic momentum

  • anantchowdhary
  • · Replies 37 ·
2
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37

Graduate Radar echo and clock synchronization

  • bernhard.rothenstein
  • · Replies 12 ·
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12

Graduate Proving the Invariance of the Spacetime Interval: Importance and Applications

  • Ragnar
  • · Replies 10 ·
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10

Graduate Explaining Mass of Particles Traveling at Speed of Light

  • vivekhere
  • · Replies 12 ·
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12

Graduate 'Gravitoelectromagnetometrics' software

  • tehno
  • · Replies 23 ·
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23

Graduate Do Photons Gain Infinite Mass at Light Speed?

  • antariksh
  • · Replies 66 ·
3
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66

Graduate Trouble Understanding GRT & Space-Time Attraction

  • AmorLiberalitas
  • · Replies 1 ·
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1

Graduate Is the Twin Paradox More Confusing When Moving in One Direction?

  • disregardthat
  • · Replies 51 ·
2
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51

Graduate How Does Force Work in Special Relativity?

  • Angelos
  • · Replies 6 ·
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6

Graduate Relativistic Momentum: Mass, Time & Distance

  • gulsen
  • · Replies 35 ·
2
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35

Graduate Some relativity questions for coleagues

  • bernhard.rothenstein
  • · Replies 29 ·
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29

Graduate Mass transported at speed of light

  • B.E.M
  • · Replies 57 ·
2
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57

Undergrad Understanding Galilean Transformation: A Troubleshooting Guide

  • xiankai
  • · Replies 1 ·
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1

Undergrad Combined velcoities of earth's rotation and revolution + sun + galaxy

  • JPC
  • · Replies 2 ·
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2

Graduate Michel,Have you ever heard of relativistic elasticity?

  • lalbatros
  • · Replies 20 ·
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20

Graduate What Are the Dimensions and Wavefunction Characteristics of a Photon?

  • Monnik
  • · Replies 5 ·
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5

Graduate Can Photons Really Influence the Curvature of Space-Time While Traveling?

  • MeJennifer
  • · Replies 2 ·
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2