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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.

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Graduate Illusion of Time: Is the Future Already Written?

Nov 14, 2011 · Replies 36 · Apr 18, 2012

2

Replies: 36

Views: 31K

Graduate Can we ever escape the pull of a black hole's singularity?

Apr 17, 2012 · Replies 2 · Apr 17, 2012

Replies: 2

Views: 3K

Graduate Does light slow down (relativistic) near a black hole?

Oct 7, 2010 · Replies 18 · Apr 17, 2012

Replies: 18

Views: 15K

Graduate Difference between Lorentz and Einstein

Mar 26, 2012 · Replies 62 · Apr 17, 2012

3

Replies: 62

Views: 14K

Graduate Faraday tensor vs. Maxwell-Eistein tensor

Apr 17, 2012 · Replies 2 · Apr 17, 2012

Replies: 2

Views: 3K

Graduate A one-form versus a dual basis vector

Apr 17, 2012 · Replies 2 · Apr 17, 2012

Replies: 2

Views: 3K

Graduate Implications of orthogonal clocks in rockets

Apr 16, 2012 · Replies 12 · Apr 17, 2012

Replies: 12

Views: 3K

Graduate Understanding Planck Length and Time in Relation to Spacetime and Acceleration

Apr 16, 2012 · Replies 2 · Apr 17, 2012

Replies: 2

Views: 2K

High School I have a fundamental mis-understanding about gravity.

Apr 12, 2012 · Replies 24 · Apr 17, 2012

Replies: 24

Views: 7K

Graduate Orbits in strongly curved spacetime

Apr 15, 2012 · Replies 3 · Apr 17, 2012

Replies: 3

Views: 3K

Undergrad Was gravitational length contraction predicted by general theory of relativity ?

Apr 17, 2012 · Replies 2 · Apr 17, 2012

Replies: 2

Views: 2K

Graduate Does an External Observer See a Different Light Ray Path in Special Relativity?

Apr 16, 2012 · Replies 2 · Apr 17, 2012

Replies: 2

Views: 2K

Graduate Deriving Schwarzschild Metric: A Simple Method?

Apr 17, 2012 · Replies 2 · Apr 17, 2012

Replies: 2

Views: 2K

Graduate Are laws of nature really the same in all reference frames?

Sep 24, 2011 · Replies 178 · Apr 17, 2012

6

Replies: 178

Views: 35K

Graduate Why does the circle appear as an ellipse when moving at different velocities?

Apr 16, 2012 · Replies 9 · Apr 17, 2012

Replies: 9

Views: 2K

Undergrad Fringe shifts - Michelson Morely Experiment

Mar 19, 2012 · Replies 29 · Apr 16, 2012

Replies: 29

Views: 9K

Undergrad Time Distortion and Time Dilation

Apr 16, 2012 · Replies 1 · Apr 16, 2012

Replies: 1

Views: 3K

Graduate Another confusing thought on relativity

Feb 11, 2012 · Replies 11 · Apr 16, 2012

Replies: 11

Views: 3K

Graduate Relativistic Space Matter Flows over near light speed ships

Apr 9, 2012 · Replies 8 · Apr 16, 2012

Replies: 8

Views: 3K

Graduate Observed speed of light [actually about relativistic velocity addition]

Apr 23, 2010 · Replies 22 · Apr 16, 2012

Replies: 22

Views: 7K

Graduate What exactly does 'many-fingered time' mean?

Apr 16, 2012 · Replies 3 · Apr 16, 2012

Replies: 3

Views: 4K

Graduate Synchronized clocks with respect to rest frame

Feb 26, 2012 · Replies 130 · Apr 16, 2012

5

Replies: 130

Views: 20K

Graduate Extra energy of photon in doppler effect

Apr 12, 2012 · Replies 12 · Apr 15, 2012

Replies: 12

Views: 3K

Undergrad Why is speed of light constent at a given place

Apr 15, 2012 · Replies 5 · Apr 15, 2012

Replies: 5

Views: 2K

Graduate Relativity, a theory of information?

Apr 8, 2012 · Replies 54 · Apr 14, 2012

2

Replies: 54

Views: 8K

Graduate What are the limitations of the Einstein field equation?

Apr 14, 2012 · Replies 1 · Apr 14, 2012

Replies: 1

Views: 2K

Graduate Can GW detectors detect scalar and vector radiation modes?

Apr 13, 2012 · Replies 1 · Apr 13, 2012

Replies: 1

Views: 2K

Graduate Gravitational time dilation

Apr 9, 2012 · Replies 40 · Apr 13, 2012

2

Replies: 40

Views: 6K

Graduate Is Gravitational Time Dilation Symmetrical Like Velocity-Based Time Dilation?

Apr 12, 2012 · Replies 5 · Apr 13, 2012

Replies: 5

Views: 2K

Graduate Understanding Wald's Book: Appendix E and the Einstein Equation

Apr 12, 2012 · Replies 1 · Apr 13, 2012

Replies: 1

Views: 2K

Graduate Why Does the Spaceship Record the Proper Time in Relativity?

Apr 8, 2012 · Replies 13 · Apr 12, 2012

Replies: 13

Views: 3K

Graduate The Relativity of Simultaneity: A Fundamental Concept in Special Relativity

Feb 7, 2012 · Replies 317 · Apr 12, 2012

11

Replies: 317

Views: 46K

Graduate Applied Momentum: Calculating Local Momentum from Rest Frame Speed

Apr 9, 2012 · Replies 15 · Apr 12, 2012

Replies: 15

Views: 3K

Graduate Magnetic Flux Q&A: Can Length Contraction Alter Quanta?

Apr 12, 2012 · Replies 4 · Apr 12, 2012

Replies: 4

Views: 1K

Graduate Doppler effect of light source

Apr 12, 2012 · Replies 5 · Apr 12, 2012

Replies: 5

Views: 2K

Graduate Schwartzschild metric difficulty

Apr 12, 2012 · Replies 3 · Apr 12, 2012

Replies: 3

Views: 2K

Graduate The postulates of Special Relativity

Apr 11, 2012 · Replies 3 · Apr 11, 2012

Replies: 3

Views: 2K

Graduate Visualization of space time contraction and gravity

Apr 7, 2012 · Replies 4 · Apr 11, 2012

Replies: 4

Views: 5K

Graduate The relationship between coordinate systems and reference frame

Apr 11, 2012 · Replies 5 · Apr 11, 2012

Replies: 5

Views: 3K

Graduate Why the black hole density is called the infinite density.

Apr 5, 2012 · Replies 57 · Apr 11, 2012

2

Replies: 57

Views: 12K

Graduate Observing the physics of Black Hole interiors‏

Dec 12, 2011 · Replies 19 · Apr 11, 2012

Replies: 19

Views: 5K

Undergrad Spacetime dilation in special relativity

Apr 10, 2012 · Replies 7 · Apr 10, 2012

Replies: 7

Views: 2K

Graduate Why Do We Consider Gravitons if Gravity Is Space-Time Curvature?

Apr 10, 2012 · Replies 2 · Apr 10, 2012

Replies: 2

Views: 3K

Undergrad Questions about results of time traveling

Apr 10, 2012 · Replies 6 · Apr 10, 2012

Replies: 6

Views: 2K

Graduate Does Born rigidity describe particle creation?

Mar 31, 2012 · Replies 5 · Apr 10, 2012

Replies: 5

Views: 3K

Graduate How Does Gravity Influence Light's Path in General Relativity?

Apr 10, 2012 · Replies 4 · Apr 10, 2012

Replies: 4

Views: 2K

Graduate Relativists please answer this scnerio

Apr 10, 2012 · Replies 3 · Apr 10, 2012

Replies: 3

Views: 2K

Graduate Quick, simple question about contraviant and covariant components

Apr 9, 2012 · Replies 1 · Apr 9, 2012

Replies: 1

Views: 2K

Graduate Black holes slowing as they pass each other?

Apr 8, 2012 · Replies 11 · Apr 9, 2012

Replies: 11

Views: 3K

Graduate Denote the value of the determinant

Apr 9, 2012 · Replies 1 · Apr 9, 2012

Replies: 1

Views: 3K

Graduate Singularity theorms and perturbation from exact symmetry

Mar 18, 2012 · Replies 1 · Apr 9, 2012

Replies: 1

Views: 2K

Graduate Accessible Proof for Buchdahl's Theorem in General Relativity?

Apr 9, 2012 · Replies 1 · Apr 9, 2012

Replies: 1

Views: 3K

Graduate Question about Einsten's Train and lightning experiment

Apr 7, 2012 · Replies 3 · Apr 8, 2012

Replies: 3

Views: 3K

Graduate What is the Relativity of Simultaneity?

Apr 7, 2012 · Replies 5 · Apr 8, 2012

Replies: 5

Views: 3K

Graduate How does the unbreakable speed of light controversy works?

Mar 31, 2012 · Replies 26 · Apr 8, 2012

Replies: 26

Views: 6K

Graduate Why Does the Phase Velocity Exceed c in Certain Cases?

Apr 5, 2012 · Replies 6 · Apr 7, 2012

Replies: 6

Views: 3K

Graduate Transforming co- and contravariant 4-vectors

Apr 7, 2012 · Replies 4 · Apr 7, 2012

Replies: 4

Views: 4K

Undergrad General theory of relativity clearly explained

Apr 3, 2012 · Replies 11 · Apr 6, 2012

Replies: 11

Views: 4K

Graduate Covariant Derivation of the Ricci Tensor: Einstein's Method Now Online

Mar 31, 2012 · Replies 2 · Apr 6, 2012

Replies: 2

Views: 3K

Graduate 4-vector law of motion in different inertial frames

Apr 5, 2012 · Replies 1 · Apr 5, 2012

Replies: 1

Views: 2K

Graduate Is stress a source of gravity?

Mar 10, 2012 · Replies 264 · Apr 4, 2012

9

Replies: 264

Views: 33K

Graduate Does Relativistic effect applies to light as well?

Apr 4, 2012 · Replies 2 · Apr 4, 2012

Replies: 2

Views: 2K

Graduate Sense of Absolute in Relativity?

Apr 1, 2012 · Replies 8 · Apr 4, 2012

Replies: 8

Views: 2K

Graduate Understanding AdS Global Hyperbolicity: Insights from Hawking and Ellis

Apr 3, 2012 · Replies 2 · Apr 3, 2012

Replies: 2

Views: 3K

Undergrad Time Dilation Data Sets: Get Graphs & Experiments Results

Apr 3, 2012 · Replies 2 · Apr 3, 2012

Replies: 2

Views: 2K

Graduate Denominator in cosmological constant term in Newtonian gravity

Apr 2, 2012 · Replies 2 · Apr 3, 2012

Replies: 2

Views: 2K

Undergrad What is the shape of an electron's circular motion in a magnetic field?

Apr 3, 2012 · Replies 6 · Apr 3, 2012

Replies: 6

Views: 2K

Graduate Derivation of Proper Time in General Relativity

Apr 3, 2012 · Replies 5 · Apr 3, 2012

Replies: 5

Views: 5K

Undergrad Is force of gravity dependent on speed of one of the body?

Mar 29, 2012 · Replies 68 · Apr 3, 2012

3

Replies: 68

Views: 10K

Graduate How Does Observer Proximity Affect Clock Synchronization in Different Frames?

Mar 26, 2012 · Replies 29 · Apr 3, 2012

Replies: 29

Views: 5K

Graduate Effect of acceleration on shape and size of a light wave front

Mar 29, 2012 · Replies 27 · Apr 3, 2012

Replies: 27

Views: 5K

Graduate Exceed speed of light: always exceeded speed of light?

Dec 25, 2011 · Replies 11 · Apr 2, 2012

Replies: 11

Views: 7K

Undergrad Einstein's Theory of Relativity - Is Light Speed Absolute?

Apr 2, 2012 · Replies 2 · Apr 2, 2012

Replies: 2

Views: 2K

Graduate Understanding Ricci Tensor of FRW Universe: Equation 74 Explained

Mar 30, 2012 · Replies 21 · Mar 31, 2012

Replies: 21

Views: 12K

Undergrad Can Light Travel Into the Future While We Explore Time Travel?

Dec 14, 2011 · Replies 50 · Mar 31, 2012

2

Replies: 50

Views: 11K

Graduate Metric Connection from Geodesic Equation

Mar 31, 2012 · Replies 2 · Mar 31, 2012

Replies: 2

Views: 2K

Undergrad How can anyone know photons exist?

Mar 28, 2012 · Replies 8 · Mar 31, 2012

Replies: 8

Views: 4K

Undergrad Speed of Light: Doubts and Confusions

Mar 28, 2012 · Replies 12 · Mar 30, 2012

Replies: 12

Views: 3K

Graduate One way speed of light measurement proposal

Mar 7, 2012 · Replies 56 · Mar 30, 2012

2

Replies: 56

Views: 10K

Graduate CPT (M?) symmetries in Kerr-Newman metric

Feb 29, 2012 · Replies 62 · Mar 30, 2012

3

Replies: 62

Views: 10K

Undergrad Einstein's Train Metaphor: Explained

Mar 16, 2012 · Replies 6 · Mar 30, 2012

Replies: 6

Views: 5K

Graduate Non-diff theories of dynamical spacetime

Mar 30, 2012 · Replies 4 · Mar 30, 2012

Replies: 4

Views: 2K

Graduate Apparent contradiction: Two charges moving parallel to each other

Mar 22, 2012 · Replies 17 · Mar 29, 2012

Replies: 17

Views: 7K

Graduate Force of gravity in relativity

Mar 29, 2012 · Replies 2 · Mar 29, 2012

Replies: 2

Views: 2K

Graduate Would a relativistic ship really need much shielding?

Mar 29, 2012 · Replies 1 · Mar 29, 2012

Replies: 1

Views: 2K

Graduate Gravitational Equivalent of Rindler Space

Mar 27, 2012 · Replies 15 · Mar 29, 2012

Replies: 15

Views: 5K

Graduate References for a Lightspeed Ship

Mar 27, 2012 · Replies 5 · Mar 28, 2012

Replies: 5

Views: 2K

Graduate Simultaneity of Events, Do I Have it Right?

Mar 28, 2012 · Replies 1 · Mar 28, 2012

Replies: 1

Views: 2K

Graduate Relativistic interpretation question?

Mar 22, 2012 · Replies 17 · Mar 28, 2012

Replies: 17

Views: 3K

Graduate Time Dilation & Speed of Light: Evidence Needed

Mar 28, 2012 · Replies 5 · Mar 28, 2012

Replies: 5

Views: 2K

Graduate Calculating Muon Half-Life: Length Contraction vs Time Dilation

Mar 28, 2012 · Replies 2 · Mar 28, 2012

Replies: 2

Views: 2K

Graduate Is the Earth just a mass within a vast, curved space-time fabric?

Mar 28, 2012 · Replies 2 · Mar 28, 2012

Replies: 2

Views: 2K

Graduate What would happen when Blackholes Collide?

Mar 25, 2012 · Replies 6 · Mar 28, 2012

Replies: 6

Views: 3K

Graduate Is Light's Mass Infinite at the Speed of Light?

Mar 17, 2012 · Replies 14 · Mar 28, 2012

Replies: 14

Views: 4K

Undergrad Optics - Reflection of image from a moving mirror

Mar 13, 2012 · Replies 36 · Mar 28, 2012

2

Replies: 36

Views: 8K

Graduate What do points on the manifold correspond to in reality?

Mar 15, 2012 · Replies 24 · Mar 27, 2012

Replies: 24

Views: 5K

Graduate How Are Muon Velocities Measured in Storage Rings?

Mar 27, 2012 · Replies 7 · Mar 27, 2012

Replies: 7

Views: 3K

Undergrad Relativity Questions: Can Time Change Significantly in Space or Black Holes?

Mar 25, 2012 · Replies 12 · Mar 27, 2012

Replies: 12

Views: 3K

Graduate Help understanding quadratic gravity

Mar 25, 2012 · Replies 2 · Mar 27, 2012

Replies: 2

Views: 2K

Graduate Extremely Basic Question Regarding Time Dilation

Mar 26, 2012 · Replies 6 · Mar 26, 2012

Replies: 6

Views: 3K

Relativity

The theory of relativity, formulated by Albert Einstein, comprises two fundamental theories—special and general relativity. Special relativity, proposed in 1905, redefines our understanding of space and time by asserting the constancy of the speed of light for all observers and introducing concepts like time dilation and length contraction.

General relativity, presented in 1915, extends these principles to incorporate gravity. It describes gravity as the curvature of spacetime caused by massive objects, leading to phenomena like gravitational time dilation and the prediction of black holes. Einstein's equations have been consistently validated through experiments and observations, profoundly influencing our comprehension of the universe's fabric and dynamics.

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