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 Is the first postulate necessary?

  • CPL.Luke
  • · Replies 10 ·
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10

Graduate The Relativistic Mass-Energy Relationship

  • Leonardo Sidis
  • · Replies 24 ·
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24

Graduate E=mc2 Energy converts to matter

  • .ultimate
  • · Replies 4 ·
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4

Undergrad Time dilation- V relative to what?

  • DyslexicHobo
  • · Replies 12 ·
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12

Graduate Constant 1g acceleration near light speed—does proper acceleration feel the same?

  • ledopmi
  • · Replies 12 ·
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12

Graduate Einstein's Field Equation Stress-Energy

  • Ich
  • · Replies 16 ·
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16

Graduate Geodesic Deviation: Deriving Formula with Schtuz's Book

  • Terilien
  • · Replies 2 ·
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2

Graduate Is Simultaneity Absolute in Einstein's Theory of Relativity?

  • fireball3004
  • · Replies 56 ·
2
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Graduate Do position and velocity relationships persist in an inertial frame?

  • imy786
  • · Replies 1 ·
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Graduate Is this the fabric of the universe?

  • paul_peciak
  • · Replies 1 ·
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1

Graduate If a charged particle is free falling in the gravitational field-

  • magnetar
  • · Replies 51 ·
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51

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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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 How effective are earth-based gravity wave detectors and where do they operate?

  • 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 How do you calculate light bending from spacetime curvature?

  • 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 How can gravity bend light if photons have no mass?

  • 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?

  • 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 use light speed in vacuum for time dilation, not in the medium

  • Ragnar
  • · Replies 43 ·
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Graduate Link btw manifolds and space-time

  • quasar987
  • · Replies 99 ·
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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 ·
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Graduate What Does It Mean When We Say Spacetime Is Curved?

  • jimbobjames
  • · Replies 11 ·
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11

Graduate What does ∇_{[a}F_{bc]} mean?

  • 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 If my arms were 10 light years long, wouldn't waving them exceed light speed?

  • 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 Why are null geodesics considered curved if their arc length is zero?

  • 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 Basis of the gradient one form and dx^alpha notation

  • 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 Does length contraction make the universe appear flattened at near light speed?

  • 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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30

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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54

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

Do sign conventions in physics follow any cultural pattern?

  • Thrice
  • · Replies 17 ·
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17

Graduate Can photons reveal if spacetime is 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 Why do all other frames appear time-dilated to a given observer?

  • 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 Detecting fringe shifts in a Michelson interferometer gravitational wave detector

  • Dr.Brain
  • · Replies 1 ·
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1

Undergrad Does a photon have dynamic mass from E=hv/c²?

  • DonnieD
  • · Replies 76 ·
3
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76

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 How do we prove that the spacetime interval is invariant?

  • Ragnar
  • · Replies 10 ·
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10

Graduate Does a particle traveling at the speed of light have zero mass?

  • 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