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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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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: 11K

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

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

2

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: 4K

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

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

Replies: 1

Views: 3K

Graduate Solve Gravity Puzzle: m1 & m2 Connected by a Bar

Nov 16, 2005 · Replies 5 · Nov 25, 2005

Replies: 5

Views: 4K

Graduate Objections to Relativistic mass

Nov 22, 2005 · Replies 12 · Nov 25, 2005

Replies: 12

Views: 3K

Graduate The Effects of Relativistic Mass on High Speed Collisions

Nov 24, 2005 · Replies 2 · Nov 24, 2005

Replies: 2

Views: 3K

Poll

Graduate Does the Trajectory Formula Account for the Speed of Light Delay?

Nov 21, 2005 · Replies 4 · Nov 23, 2005

Replies: 4

Views: 2K

Graduate Experimenting with Light - Answers to Your Questions

Oct 25, 2005 · Replies 3 · Nov 23, 2005

Replies: 3

Views: 3K

Graduate Gravity in a Warped Space-Time: Is It Possible?

Nov 21, 2005 · Replies 10 · Nov 22, 2005

Replies: 10

Views: 3K

Graduate Question on Addition of Velocities

Nov 22, 2005 · Replies 11 · Nov 22, 2005

Replies: 11

Views: 3K

Graduate Why is Relativity still a theory?

Nov 22, 2005 · Replies 20 · Nov 22, 2005

Replies: 20

Views: 17K

Graduate How do we know Gravity Moves the Speed of Light?

Nov 18, 2005 · Replies 11 · Nov 22, 2005

Replies: 11

Views: 4K

Graduate Could Faster-Than-Light Travel Create Time Dilation Effects?

Nov 17, 2005 · Replies 14 · Nov 21, 2005

Replies: 14

Views: 8K

Graduate Can a black hole form using only photons - in theory?

Nov 21, 2005 · Replies 9 · Nov 21, 2005

Replies: 9

Views: 4K

Graduate Relativistic physics of space?

Nov 20, 2005 · Replies 5 · Nov 21, 2005

Replies: 5

Views: 2K

Graduate Energy Acceleration: Electron Mass at C?

Nov 20, 2005 · Replies 2 · Nov 21, 2005

Replies: 2

Views: 2K

Undergrad Why do we judge time by light?

Nov 3, 2005 · Replies 35 · Nov 20, 2005

2

Replies: 35

Views: 6K

Graduate How far back in time can we see?

Nov 15, 2005 · Replies 5 · Nov 19, 2005

Replies: 5

Views: 8K

Graduate How Does the Speed of Light Affect Observed Particle Trajectories?

Nov 16, 2005 · Replies 16 · Nov 19, 2005

Replies: 16

Views: 4K

Graduate What Are the Best Textbooks for Understanding Special Relativity?

Nov 17, 2005 · Replies 3 · Nov 18, 2005

Replies: 3

Views: 9K

Graduate Stability of 4D Gravity Model: Examining Possibilities

Nov 17, 2005 · Replies 2 · Nov 18, 2005

Replies: 2

Views: 5K

Speed of Light Exceeded: Debunking the Controversial Claim

Nov 18, 2005 · Replies 1 · Nov 18, 2005

Replies: 1

Views: 2K

Graduate Does Length Contraction Affect the Wavelength of Light from a Moving Source?

Nov 17, 2005 · Replies 1 · Nov 17, 2005

Replies: 1

Views: 3K

Graduate What happens when two photons travel at the speed of light?

Oct 26, 2005 · Replies 40 · Nov 17, 2005

2

Replies: 40

Views: 15K

Graduate Light Relativity Questions - Explained

Nov 17, 2005 · Replies 10 · Nov 17, 2005

Replies: 10

Views: 2K

Graduate Relativity Paradox: Resolving Hand-Waving Questions

Nov 11, 2005 · Replies 3 · Nov 17, 2005

Replies: 3

Views: 3K

Graduate The Potential Problems with Tachyons in Our Universe

Nov 16, 2005 · Replies 11 · Nov 17, 2005

Replies: 11

Views: 3K

Graduate Can a Car Travel Faster Than Light?

Sep 17, 2005 · Replies 13 · Nov 17, 2005

Replies: 13

Views: 3K

Graduate Lorentz Transformation: What Is It and How To Use It?

Nov 14, 2005 · Replies 12 · Nov 17, 2005

Replies: 12

Views: 4K

Graduate Falling Feet First into a Black Hole

Nov 16, 2005 · Replies 4 · Nov 16, 2005

Replies: 4

Views: 2K

Undergrad What Are Non-Astrophysical Examples of Experimental Evidence for E=MC^2?

Nov 16, 2005 · Replies 5 · Nov 16, 2005

Replies: 5

Views: 2K

Graduate What Unique Insights Does Wald Offer on Teaching General Relativity?

Nov 15, 2005 · Replies 2 · Nov 16, 2005

Replies: 2

Views: 3K

Graduate Picture a small mass orbiting around a large mass

Nov 5, 2005 · Replies 22 · Nov 16, 2005

Replies: 22

Views: 5K

Graduate High speeds - becoming a black hole

Nov 14, 2005 · Replies 34 · Nov 15, 2005

2

Replies: 34

Views: 7K

Graduate Could Light Speed Fluctuate Due to Transfer of Inertial Reference Frames?

Nov 14, 2005 · Replies 6 · Nov 15, 2005

Replies: 6

Views: 3K

Graduate Relative Nature of Time: Is it True?

Nov 14, 2005 · Replies 4 · Nov 15, 2005

Replies: 4

Views: 4K

Graduate When the station comes to the train?

Nov 13, 2005 · Replies 9 · Nov 15, 2005

Replies: 9

Views: 3K

Graduate Speed of Light: Path in Gravity Well & Denser Medium

Nov 14, 2005 · Replies 3 · Nov 14, 2005

Replies: 3

Views: 2K

Graduate Advanced books/papers on derivation of Newtonian mechanics from GR

Sep 15, 2005 · Replies 92 · Nov 14, 2005

4

Replies: 92

Views: 12K

Undergrad Is c the fastest known velocity?

Nov 8, 2005 · Replies 22 · Nov 13, 2005

Replies: 22

Views: 5K

Graduate Where Can I Find Resources on Einstein's Field Equations and Their Context?

Oct 26, 2005 · Replies 23 · Nov 13, 2005

Replies: 23

Views: 5K

Graduate How Does Mass Increase When Accelerating to the Speed of Light?

Nov 11, 2005 · Replies 21 · Nov 12, 2005

Replies: 21

Views: 5K

Graduate How Does Gravity Work in a One Dimensional Universe?

Nov 12, 2005 · Replies 0 · Nov 12, 2005

Replies: 0

Views: 3K

Graduate Does the Mass Density of an Object Change When Approaching the Speed of Light?

Nov 10, 2005 · Replies 6 · Nov 12, 2005

Replies: 6

Views: 6K

Undergrad Is time in the universe constant?

Nov 10, 2005 · Replies 3 · Nov 12, 2005

Replies: 3

Views: 4K

Graduate Wormholes and energy conservation

Nov 9, 2005 · Replies 11 · Nov 11, 2005

Replies: 11

Views: 8K

Graduate Is mass dependent on the observer?

Nov 11, 2005 · Replies 3 · Nov 11, 2005

Replies: 3

Views: 3K

Graduate Does a Muon Centrifuge Experiment Show Gravitational Time Effects?

Oct 25, 2005 · Replies 19 · Nov 10, 2005

Replies: 19

Views: 4K

Graduate Why Is Newton's Constant Used in Planck Units?

Nov 5, 2005 · Replies 9 · Nov 10, 2005

Replies: 9

Views: 3K

Graduate Time dilation and infinite speed

Nov 2, 2005 · Replies 25 · Nov 9, 2005

Replies: 25

Views: 7K

Graduate Globally Hyperbolic Spacetime: What Is It?

Nov 2, 2005 · Replies 6 · Nov 9, 2005

Replies: 6

Views: 7K

Undergrad Does Photon Age Change in Different Mediums?

Nov 6, 2005 · Replies 16 · Nov 9, 2005

Replies: 16

Views: 4K

Undergrad How Does Light Speed Change in Relativity?

Nov 1, 2005 · Replies 7 · Nov 8, 2005

Replies: 7

Views: 2K

Graduate Is Gravitational Potential Energy Not Really Energy for Photons?

Nov 1, 2005 · Replies 17 · Nov 8, 2005

Replies: 17

Views: 3K

Graduate New Bee question on Gauss Coordinates systems

Nov 6, 2005 · Replies 5 · Nov 8, 2005

Replies: 5

Views: 4K

High School Uncovering the Truth Behind E=mc²

Nov 5, 2005 · Replies 8 · Nov 7, 2005

Replies: 8

Views: 2K

Graduate Unraveling the Mysterious Energy Gained from a Black Hole

Nov 2, 2005 · Replies 10 · Nov 6, 2005

Replies: 10

Views: 6K

Undergrad Object Shortening: Causes & Similarities to Time Dilation

Nov 4, 2005 · Replies 8 · Nov 6, 2005

Replies: 8

Views: 4K

Graduate Relativity and the Dark Energy question

Nov 22, 2004 · Replies 5 · Nov 5, 2005

Replies: 5

Views: 4K

Graduate Why Does the Standard Kinetic Energy Formula Fail at High Velocities?

Nov 5, 2005 · Replies 1 · Nov 5, 2005

Replies: 1

Views: 2K

Undergrad Relativity: Understanding Potential | Explainer

Nov 1, 2005 · Replies 10 · Nov 5, 2005

Replies: 10

Views: 3K

Undergrad Is momentum conserved in all inertial frames?

Nov 4, 2005 · Replies 6 · Nov 4, 2005

Replies: 6

Views: 4K

Graduate Could any curved space be a cut in a higher-dimensional flat space ?

Nov 4, 2005 · Replies 11 · Nov 4, 2005

Replies: 11

Views: 6K

Graduate How do GR effects influence escape velocity in stars and black holes?

Oct 26, 2005 · Replies 19 · Nov 4, 2005

Replies: 19

Views: 4K

Undergrad Gaining Kinetic Energy Through Time: Explained

Oct 26, 2005 · Replies 86 · Nov 3, 2005

3

Replies: 86

Views: 11K

Graduate Understanding Metric Tensors in Riemannian Spaces

Nov 3, 2005 · Replies 6 · Nov 3, 2005

Replies: 6

Views: 3K

Graduate Pushing Pole: When Will Opposite End Move?

Oct 30, 2005 · Replies 9 · Nov 2, 2005

Replies: 9

Views: 3K

Graduate Idea of increased mass at relativistic speeds

Aug 13, 2005 · Replies 103 · Nov 2, 2005

4

Replies: 103

Views: 15K

Graduate Simultaneity in Special relativity

Oct 31, 2005 · Replies 4 · Nov 1, 2005

Replies: 4

Views: 3K

Graduate What Happens When a Light-Year-Long Wall Travels at Near Light Speed?

Oct 30, 2005 · Replies 8 · Nov 1, 2005

Replies: 8

Views: 3K

Graduate Proof of Gravity Waves Energy: Richard Feymann's Beads on a Rod

Oct 28, 2005 · Replies 4 · Nov 1, 2005

Replies: 4

Views: 6K

Graduate Length Contraction & Molecular Structure Effects

Oct 31, 2005 · Replies 5 · Oct 31, 2005

Replies: 5

Views: 3K

Graduate Paralel universe and Warping of Space Questions

Oct 30, 2005 · Replies 1 · Oct 30, 2005

Replies: 1

Views: 6K

Graduate Garth & Einstein: Examining Rotational Mass & Spacetime Distortion

Oct 30, 2005 · Replies 2 · Oct 30, 2005

Replies: 2

Views: 3K

Graduate Supplies Paradox Help: Solving Lorentz Contraction

Oct 5, 2005 · Replies 8 · Oct 30, 2005

Replies: 8

Views: 2K

Graduate Is Light's Speed Truly Constant in All Frames of Reference?

Oct 30, 2005 · Replies 1 · Oct 30, 2005

Replies: 1

Views: 6K

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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