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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 Does general relativity predict expansion?

Jan 18, 2006 · Replies 18 · Jan 23, 2006

Replies: 18

Views: 6K

Graduate Fields and relativity - a broad question

Jan 22, 2006 · Replies 1 · Jan 22, 2006

Replies: 1

Views: 2K

High School Increase in mass & decrease in volume?

Jan 17, 2006 · Replies 9 · Jan 22, 2006

Replies: 9

Views: 10K

Graduate Relativistic velocities of uncharged particles

Jan 14, 2006 · Replies 14 · Jan 21, 2006

Replies: 14

Views: 4K

Undergrad Is Time Travel to the Past Possible with Modern Technology?

Jan 20, 2006 · Replies 2 · Jan 21, 2006

Replies: 2

Views: 3K

Graduate Length contraction and special relativity

Jan 12, 2006 · Replies 23 · Jan 20, 2006

Replies: 23

Views: 6K

Graduate Is E=mc^2 Confirmed with High Accuracy? NIST Experiment Provides Strong Evidence

Jan 19, 2006 · Replies 1 · Jan 19, 2006

Replies: 1

Views: 2K

Undergrad Why Don't Singularities Instantly Suck Everything In?

Jan 18, 2006 · Replies 3 · Jan 18, 2006

Replies: 3

Views: 3K

Graduate The Foundations of Relativity II

Jan 9, 2006 · Replies 17 · Jan 18, 2006

Replies: 17

Views: 4K

Graduate Is the Muon's Perception of Distance Correct in Relativity?

Jan 16, 2006 · Replies 6 · Jan 16, 2006

Replies: 6

Views: 3K

Graduate How Does Our Movement Through Spacetime Influence the Perception of Time?

Jan 15, 2006 · Replies 31 · Jan 15, 2006

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Replies: 31

Views: 4K

Undergrad This is probably just a coincidence, but

Jan 13, 2006 · Replies 10 · Jan 15, 2006

Replies: 10

Views: 3K

Graduate What Would a Traveler See When Falling into a Black Hole?

Jan 13, 2006 · Replies 3 · Jan 14, 2006

Replies: 3

Views: 3K

Graduate Time variation in the event horizon

Jan 13, 2006 · Replies 2 · Jan 14, 2006

Replies: 2

Views: 2K

Graduate Is Acceleration Impacting Time Perception a Solvable Paradox?

Jan 12, 2006 · Replies 13 · Jan 13, 2006

Replies: 13

Views: 4K

Graduate Understanding the Structure and Transformation of Tensors in Spacetime

Dec 20, 2005 · Replies 86 · Jan 13, 2006

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Replies: 86

Views: 13K

Graduate Triplet Paradox: Solve the Contradiction!

Jan 7, 2006 · Replies 12 · Jan 12, 2006

Replies: 12

Views: 7K

High School Why is c Squared in the Equation e=mc^2?

Jan 9, 2006 · Replies 9 · Jan 11, 2006

Replies: 9

Views: 12K

Graduate The Logic Behind Einstein's Relativity of Time

Jan 7, 2006 · Replies 39 · Jan 11, 2006

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Replies: 39

Views: 7K

Graduate Questions on Horizons: Difference Between Event & Apparent Horizons

Dec 18, 2005 · Replies 13 · Jan 11, 2006

Replies: 13

Views: 4K

Graduate What Determines the Size and Density of a Black Hole?

Dec 3, 2005 · Replies 6 · Jan 10, 2006

Replies: 6

Views: 3K

Graduate Why do objects follow curved trajectories under Earth's gravity?

Dec 18, 2005 · Replies 50 · Jan 9, 2006

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Replies: 50

Views: 9K

Graduate Teleportation-possible or not?

Dec 31, 2005 · Replies 11 · Jan 8, 2006

Replies: 11

Views: 10K

Graduate Schwarzschild Metric with multiple masses

Jan 8, 2006 · Replies 4 · Jan 8, 2006

Replies: 4

Views: 2K

Graduate Distorted, structure (3D) vs warped, fabric (2D)

Jan 7, 2006 · Replies 6 · Jan 7, 2006

Replies: 6

Views: 3K

Graduate How to imagine distorted space

May 13, 2005 · Replies 10 · Jan 7, 2006

Replies: 10

Views: 4K

Graduate What is a bifurcation surface and a binormal vector?

Jan 6, 2006 · Replies 1 · Jan 6, 2006

Replies: 1

Views: 8K

Graduate Could Relativity Still Apply in a Universe Filled with Water?

Dec 13, 2005 · Replies 48 · Jan 6, 2006

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Replies: 48

Views: 9K

Graduate Relativity : the Special and General Theory

Jan 5, 2006 · Replies 3 · Jan 5, 2006

Replies: 3

Views: 3K

Graduate Calculating Observer C's Speed from Point A as Observed by Observer B

Dec 22, 2005 · Replies 15 · Jan 5, 2006

Replies: 15

Views: 3K

High School What Are Matter, Energy, and Space in Our Physical Universe?

Dec 28, 2005 · Replies 6 · Jan 5, 2006

Replies: 6

Views: 2K

Graduate Holographic Principle: Entropy & Area for Observers Moving w/BH

Jan 1, 2006 · Replies 1 · Jan 4, 2006

Replies: 1

Views: 3K

Graduate Understanding the Length Contraction Paradox in Special Relativity

Dec 29, 2005 · Replies 10 · Jan 3, 2006

Replies: 10

Views: 6K

Graduate Neutroscopic methods in General Relativity

Jan 2, 2006 · Replies 5 · Jan 3, 2006

Replies: 5

Views: 3K

Graduate Can Wormholes Enable Time Travel to the Past?

Dec 31, 2005 · Replies 25 · Jan 1, 2006

Replies: 25

Views: 6K

Graduate My Twin in a Schwarzschild Black Hole: What Would He See?

Dec 18, 2005 · Replies 17 · Dec 31, 2005

Replies: 17

Views: 7K

Graduate I've got a black hole in my understanding

Dec 30, 2005 · Replies 1 · Dec 31, 2005

Replies: 1

Views: 2K

Confirmed: E=mc^2 Validated Once Again, Despite Skepticism | PhysLink

Dec 29, 2005 · Replies 5 · Dec 31, 2005

Replies: 5

Views: 3K

Graduate Simultaneity Confusion in Relativity

Dec 30, 2005 · Replies 4 · Dec 30, 2005

Replies: 4

Views: 3K

Graduate Unraveling the Mystery of Warped 4D Spacetime

Dec 30, 2005 · Replies 4 · Dec 30, 2005

Replies: 4

Views: 3K

Graduate Back Reaction in Black Hole Physics and GR

Dec 30, 2005 · Replies 1 · Dec 30, 2005

Replies: 1

Views: 5K

Graduate Is Gravity Explained by the Dimple in Space-Time Fabric?

Dec 28, 2005 · Replies 5 · Dec 30, 2005

Replies: 5

Views: 3K

Graduate Are Experiments Proving Length Contraction?

Dec 29, 2005 · Replies 4 · Dec 29, 2005

Replies: 4

Views: 2K

Graduate Rotations in Special Relativity

Dec 29, 2005 · Replies 4 · Dec 29, 2005

Replies: 4

Views: 3K

Undergrad Does a Black Hole's Event Horizon Increase with Mass?

Dec 4, 2005 · Replies 9 · Dec 29, 2005

Replies: 9

Views: 5K

Graduate A feasible experiment that can decide

Dec 24, 2005 · Replies 32 · Dec 28, 2005

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Replies: 32

Views: 6K

Graduate GR: Inertial Systems & Direction Changes of Motion

Dec 28, 2005 · Replies 3 · Dec 28, 2005

Replies: 3

Views: 3K

Graduate Does the Constant Speed of Light Postulate Extend to Mechanical Processes?

Dec 5, 2005 · Replies 15 · Dec 28, 2005

Replies: 15

Views: 3K

Graduate What can an observer see during his travel into BH?

Dec 27, 2005 · Replies 3 · Dec 28, 2005

Replies: 3

Views: 2K

Graduate Is it Possible For A Particle To Stay Completely Still in Space-Time?

Dec 25, 2005 · Replies 15 · Dec 26, 2005

Replies: 15

Views: 8K

Graduate Accuracy of SR's Time Dilation & Space Contraction

Dec 25, 2005 · Replies 2 · Dec 26, 2005

Replies: 2

Views: 2K

Graduate Is arithmetic still true in a gravitational field

Dec 24, 2005 · Replies 2 · Dec 26, 2005

Replies: 2

Views: 2K

Undergrad Why Does Mass Increase with Speed?

Dec 24, 2005 · Replies 11 · Dec 25, 2005

Replies: 11

Views: 8K

Graduate Moral Relativity: Is There an Absolute Moral Fact?

Oct 26, 2005 · Replies 44 · Dec 24, 2005

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Replies: 44

Views: 5K

Graduate What Does the Right End of an Oscillating Pen Look Like in Relativistic Motion?

Dec 23, 2005 · Replies 8 · Dec 24, 2005

Replies: 8

Views: 2K

Graduate Possible method to escape a black hole?

Dec 20, 2005 · Replies 7 · Dec 22, 2005

Replies: 7

Views: 4K

Graduate Length Contraction: Can Fundamental Particles Contract?

Dec 21, 2005 · Replies 3 · Dec 21, 2005

Replies: 3

Views: 3K

Graduate Unraveling the Mystery of Gravity and Space-Time Curvature in General Relativity

Dec 20, 2005 · Replies 6 · Dec 21, 2005

Replies: 6

Views: 3K

Graduate Locally Inertial Coordinates: Spacetime Points & Freely Falling Particles

Dec 19, 2005 · Replies 1 · Dec 19, 2005

Replies: 1

Views: 2K

Graduate If power were applied to a one meter cube of quartz crystal

Dec 18, 2005 · Replies 1 · Dec 18, 2005

Replies: 1

Views: 2K

High School From Lights Point of Reference Is It Traveling Infinetly Fast?

Dec 16, 2005 · Replies 6 · Dec 17, 2005

Replies: 6

Views: 3K

Undergrad Speed of light in different frames

Dec 16, 2005 · Replies 14 · Dec 16, 2005

Replies: 14

Views: 3K

Graduate What is wrong with my thinking?

Dec 16, 2005 · Replies 2 · Dec 16, 2005

Replies: 2

Views: 2K

Undergrad Twin paradox? HA I'm an only child.

Dec 14, 2005 · Replies 17 · Dec 16, 2005

Replies: 17

Views: 3K

Graduate Big Spinning Ball Question (Confused)

Dec 15, 2005 · Replies 1 · Dec 15, 2005

Replies: 1

Views: 2K

Graduate Photons at less than speed of light?

Dec 13, 2005 · Replies 10 · Dec 15, 2005

Replies: 10

Views: 4K

Graduate What Are the Merits and Drawbacks of Kaluza-Klein Theory?

Dec 13, 2005 · Replies 6 · Dec 14, 2005

Replies: 6

Views: 6K

Graduate What are your thoughts on the Pirelli relativity award?

Oct 18, 2005 · Replies 8 · Dec 14, 2005

Replies: 8

Views: 3K

Graduate Flow of Time - What Effect Does Speed Have on Electron Orbits?

Dec 2, 2005 · Replies 26 · Dec 14, 2005

Replies: 26

Views: 6K

Graduate Preservation of Matter/Energy Through Time

Dec 14, 2005 · Replies 1 · Dec 14, 2005

Replies: 1

Views: 4K

Graduate What is the ontology of general relativity ?

Dec 13, 2005 · Replies 6 · Dec 13, 2005

Replies: 6

Views: 3K

High School Did Einstein like the term Relativity ?

Dec 13, 2005 · Replies 2 · Dec 13, 2005

Replies: 2

Views: 2K

Graduate Is Spacetime a Fluid Like Ether in Black Hole Analogies?

Dec 13, 2005 · Replies 1 · Dec 13, 2005

Replies: 1

Views: 3K

Undergrad Basic concept in special relativity

Dec 1, 2005 · Replies 6 · Dec 12, 2005

Replies: 6

Views: 4K

Undergrad A very basic question about relativity

Dec 11, 2005 · Replies 22 · Dec 12, 2005

Replies: 22

Views: 3K

Graduate Think about SR as different observers using different coordinate

Dec 11, 2005 · Replies 4 · Dec 11, 2005

Replies: 4

Views: 2K

Graduate Lorentz contraction inverse trouble

Dec 8, 2005 · Replies 6 · Dec 10, 2005

Replies: 6

Views: 3K

Graduate Question about light and relativity

Dec 9, 2005 · Replies 3 · Dec 10, 2005

Replies: 3

Views: 2K

Graduate Einstein's space elevator and the twins paradox

Dec 7, 2005 · Replies 8 · Dec 8, 2005

Replies: 8

Views: 4K

Graduate Black hole question: apparent rate of growth as seen by external observers

Dec 7, 2005 · Replies 6 · Dec 8, 2005

Replies: 6

Views: 4K

Graduate GR, time-like energy, and photon-path bending?

Dec 7, 2005 · Replies 3 · Dec 7, 2005

Replies: 3

Views: 3K

Graduate How Can Light Travel at Speed c Despite Having Energy?

Nov 26, 2005 · Replies 13 · Dec 7, 2005

Replies: 13

Views: 3K

Graduate Functional independence and energy

Dec 4, 2005 · Replies 6 · Dec 7, 2005

Replies: 6

Views: 3K

Graduate Explaining E/M Ratios of Charged Particles without Math

Nov 17, 2005 · Replies 13 · Dec 6, 2005

Replies: 13

Views: 10K

Graduate Are Relativity and Thermodynamics Compatible?

Nov 25, 2005 · Replies 4 · Dec 6, 2005

Replies: 4

Views: 2K

Graduate Is the standard view of gravity in general relativity accurate?

Nov 27, 2005 · Replies 26 · Dec 5, 2005

Replies: 26

Views: 4K

Graduate E=mc^2 in gravitational fields

Dec 2, 2005 · Replies 11 · Dec 5, 2005

Replies: 11

Views: 3K

Undergrad Help Understanding Michelson-Morley Exp: Explaining Fringe Difference

Nov 26, 2005 · Replies 9 · Dec 3, 2005

Replies: 9

Views: 3K

Graduate Can an electron escape a charged black hole after crossing its event horizon?

Dec 2, 2005 · Replies 4 · Dec 3, 2005

Replies: 4

Views: 3K

Graduate Who is Older: Spaceships Moving at Close to Speed of Light?

Dec 2, 2005 · Replies 10 · Dec 3, 2005

Replies: 10

Views: 2K

Undergrad Photon Behavior: Wave or Particle?

Dec 2, 2005 · Replies 6 · Dec 2, 2005

Replies: 6

Views: 2K

Graduate Active Gravitational Mass in GR

Nov 20, 2005 · Replies 16 · Dec 2, 2005

Replies: 16

Views: 4K

Graduate Time dilation and space contriction doubts

Dec 2, 2005 · Replies 1 · Dec 2, 2005

Replies: 1

Views: 3K

Graduate GR Time Dilation: Does It Occur in Inertial Frames?

Dec 1, 2005 · Replies 1 · Dec 2, 2005

Replies: 1

Views: 2K

Graduate How Does Time Dilation Affect Clocks on Moving Objects?

Nov 30, 2005 · Replies 6 · Dec 1, 2005

Replies: 6

Views: 3K

Graduate How Does Kaluza-Klein Theory Link Electromagnetism and General Relativity in 5D?

Nov 23, 2005 · Replies 9 · Nov 30, 2005

Replies: 9

Views: 4K

Einstein said: NO Absolute Rest

Nov 14, 2005 · Replies 24 · Nov 29, 2005

Replies: 24

Views: 10K

Undergrad K-PAX: A Scientific Analysis of Interstellar Travel and the Speed of Light

Apr 14, 2003 · Replies 48 · Nov 28, 2005

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Replies: 48

Views: 32K

Undergrad Does Earth's Rotation Affect Time Dilation Between Day and Night?

Nov 26, 2005 · Replies 6 · Nov 27, 2005

Replies: 6

Views: 3K

Graduate What are tensors and how do they relate to General Relativity?

Nov 27, 2005 · Replies 1 · Nov 27, 2005

Replies: 1

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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