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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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Must measurement of time reference light?

Dec 30, 2007 · Replies 13 · Jan 5, 2008

Replies: 13

Views: 5K

Relativistic velocity derivation under constant force

Jan 3, 2008 · Replies 6 · Jan 4, 2008

Replies: 6

Views: 8K

Space-time Fabric: how what and why it warps?

Dec 31, 2007 · Replies 10 · Jan 4, 2008

Replies: 10

Views: 7K

Energy in relation to space and time

Jan 3, 2008 · Replies 5 · Jan 4, 2008

Replies: 5

Views: 3K

Current status of gravitational collapse (full quantum mechanical treatment).

Jan 3, 2008 · Replies 3 · Jan 4, 2008

Replies: 3

Views: 2K

The Effects of Gravitomagnetism on Surrounding Particles

Jan 2, 2008 · Replies 5 · Jan 3, 2008

Replies: 5

Views: 3K

Is Gravity a Force? Modern Physics Explained

Jan 3, 2008 · Replies 7 · Jan 3, 2008

Replies: 7

Views: 49K

Schwarzschild solution and Machian variable G

Jan 2, 2008 · Replies 5 · Jan 3, 2008

Replies: 5

Views: 4K

Improper Length & Time Intervals

Jan 3, 2008 · Replies 2 · Jan 3, 2008

Replies: 2

Views: 3K

Math of an accelerating spaceship

Jan 1, 2008 · Replies 7 · Jan 2, 2008

Replies: 7

Views: 5K

When the revolution of the earth on its axis accelerates

Jan 1, 2008 · Replies 1 · Jan 1, 2008

Replies: 1

Views: 5K

Can Black Holes Accelerate Objects to Light Speed?

Dec 30, 2007 · Replies 5 · Dec 31, 2007

Replies: 5

Views: 3K

Regarding the conversion of kinetic energy to mass

Dec 23, 2007 · Replies 14 · Dec 31, 2007

Replies: 14

Views: 7K

Proper Length and Time Intervals in the Lorentz Transformations

Dec 28, 2007 · Replies 16 · Dec 30, 2007

Replies: 16

Views: 6K

Stationary axisymmetric spacetime

Dec 23, 2007 · Replies 9 · Dec 28, 2007

Replies: 9

Views: 6K

Does the Twin Paradox Challenge Classical Relativity?

Dec 28, 2007 · Replies 3 · Dec 28, 2007

Replies: 3

Views: 5K

Solve the Relativity Paradox: Two Objects Moving at Light Speed

Dec 28, 2007 · Replies 2 · Dec 28, 2007

Replies: 2

Views: 3K

A Question About Special Relativity's Basics

Dec 25, 2007 · Replies 2 · Dec 27, 2007

Replies: 2

Views: 3K

Understanding Light: Puzzled by Velocity?

Dec 26, 2007 · Replies 2 · Dec 27, 2007

Replies: 2

Views: 3K

Force propagation and length contraction

Dec 25, 2007 · Replies 5 · Dec 27, 2007

Replies: 5

Views: 4K

Calculating Relative Motion of A, B, & C: Agree?

Dec 26, 2007 · Replies 3 · Dec 27, 2007

Replies: 3

Views: 4K

Restrictions on Riemann components

Dec 23, 2007 · Replies 2 · Dec 27, 2007

Replies: 2

Views: 3K

Why do we talk about speed of light in a vaccum?

Dec 16, 2007 · Replies 16 · Dec 26, 2007

Replies: 16

Views: 5K

Can a black hole be accelerated to go faster than the speed of light?

Dec 14, 2007 · Replies 11 · Dec 25, 2007

Replies: 11

Views: 3K

Uniform Acceleration and Gravity (again)

Dec 22, 2007 · Replies 10 · Dec 25, 2007

Replies: 10

Views: 4K

Scanned relativity books on the internet

Dec 22, 2007 · Replies 5 · Dec 24, 2007

Replies: 5

Views: 3K

Is space curvature misleading?

Dec 23, 2007 · Replies 2 · Dec 24, 2007

Replies: 2

Views: 3K

Clock Synchronization: Teaching Special Relativity

Dec 21, 2007 · Replies 10 · Dec 23, 2007

Replies: 10

Views: 5K

General Relativity: gravitational waves

Dec 22, 2007 · Replies 2 · Dec 22, 2007

Replies: 2

Views: 3K

Newtonian perturbations to Minkowski

Dec 20, 2007 · Replies 2 · Dec 20, 2007

Replies: 2

Views: 3K

Simultaneity in Relativity: self-contradictory?

Dec 19, 2007 · Replies 14 · Dec 20, 2007

Replies: 14

Views: 4K

Relativity of Simultaneity: The Spreading Stain

Dec 3, 2007 · Replies 13 · Dec 20, 2007

Replies: 13

Views: 4K

What is the Newtonian limit of LCDM in astrophysics?

Dec 15, 2007 · Replies 15 · Dec 20, 2007

Replies: 15

Views: 4K

Do Black Holes Expand at the Speed of Light?

Dec 16, 2007 · Replies 12 · Dec 19, 2007

Replies: 12

Views: 3K

Following Schwartz's argument re: measuring (g-2)

Dec 13, 2007 · Replies 3 · Dec 19, 2007

Replies: 3

Views: 2K

Does the Gravitational Mass of a Moving Particle Increase with Inertial Mass?

Dec 17, 2007 · Replies 2 · Dec 17, 2007

Replies: 2

Views: 3K

Calculating GPS Locations: The Impact of Special Relativity

Dec 12, 2007 · Replies 45 · Dec 17, 2007

2

Replies: 45

Views: 10K

Is the Schwarzschild Metric Solution Correct?

Dec 16, 2007 · Replies 3 · Dec 17, 2007

Replies: 3

Views: 4K

Would Dark Matter Make Us Invisible at High Speeds?

Dec 17, 2007 · Replies 2 · Dec 17, 2007

Replies: 2

Views: 2K

Lambda Warp Drive: Locally Manipulating for Alcubierre Warp Bubble

Dec 16, 2007 · Replies 1 · Dec 17, 2007

Replies: 1

Views: 3K

Can a Stationary Observer Replace a Moving One in Relativity Experiments?

Dec 7, 2007 · Replies 17 · Dec 16, 2007

Replies: 17

Views: 7K

Photon-Electron collision problem

Dec 16, 2007 · Replies 3 · Dec 16, 2007

Replies: 3

Views: 4K

Geodesic applied to twins paradox

Dec 1, 2007 · Replies 47 · Dec 15, 2007

2

Replies: 47

Views: 7K

Mach's Principle and Equivalence

Dec 14, 2007 · Replies 3 · Dec 15, 2007

Replies: 3

Views: 3K

E=mc^2 in 1,2,3,5,6 dimentions?

Dec 14, 2007 · Replies 6 · Dec 14, 2007

Replies: 6

Views: 3K

Modified gravitation ; how to make it relativistic ?

Dec 12, 2007 · Replies 7 · Dec 14, 2007

Replies: 7

Views: 2K

How does angular speed affect the relativistic mass of a rotating cylinder?

Dec 12, 2007 · Replies 4 · Dec 14, 2007

Replies: 4

Views: 6K

Is Exotic Matter Driving the Universe's Accelerating Expansion?

Dec 13, 2007 · Replies 2 · Dec 13, 2007

Replies: 2

Views: 3K

Le Sage Gravity - some questions

Oct 26, 2006 · Replies 3 · Dec 13, 2007

Replies: 3

Views: 4K

Rotating Space Station & Gravity: A General Relativity Exploration

Dec 12, 2007 · Replies 7 · Dec 12, 2007

Replies: 7

Views: 4K

How do we know that gravity is an attractive force?

Dec 12, 2007 · Replies 15 · Dec 12, 2007

Replies: 15

Views: 4K

Free fall coordinates in Schwarzschild?

Dec 9, 2007 · Replies 14 · Dec 12, 2007

Replies: 14

Views: 7K

De Sitter relativity and Lorentz contraction

Dec 9, 2007 · Replies 3 · Dec 12, 2007

Replies: 3

Views: 3K

Why Is General Covariance Fundamental in Modern Physics?

Dec 11, 2007 · Replies 1 · Dec 11, 2007

Replies: 1

Views: 7K

Relativistic centripetal force

Sep 25, 2007 · Replies 32 · Dec 11, 2007

2

Replies: 32

Views: 15K

Schwarzschild de sitter solution

Dec 10, 2007 · Replies 3 · Dec 11, 2007

Replies: 3

Views: 6K

Is the Loedel Diagram a Special Case of the Minkowski Spacetime Diagram?

Dec 9, 2007 · Replies 11 · Dec 11, 2007

Replies: 11

Views: 11K

Kinetic theory in general relativity

Dec 10, 2007 · Replies 1 · Dec 10, 2007

Replies: 1

Views: 3K

EINSTEIN-VLASLOV EQUATION (to chriss HILMAN or anyone else who cares)

Dec 7, 2007 · Replies 3 · Dec 10, 2007

Replies: 3

Views: 2K

Relativistic wheel and orbit connection?

Dec 9, 2007 · Replies 2 · Dec 9, 2007

Replies: 2

Views: 3K

Simultaneity Check for Light Flash in Train and Platform Frames

Dec 2, 2007 · Replies 11 · Dec 9, 2007

Replies: 11

Views: 3K

Cooperstock &Tieu's most recent paper

Dec 5, 2007 · Replies 4 · Dec 9, 2007

Replies: 4

Views: 3K

Does General Relativity Explain Mercury's Perihelion Precession and the CMBR?

Dec 3, 2007 · Replies 2 · Dec 9, 2007

Replies: 2

Views: 3K

Closing Door Paradox in SR Theory

Dec 4, 2007 · Replies 5 · Dec 9, 2007

Replies: 5

Views: 3K

Time Dilation: 10.5B Years at Light Speed?

Dec 7, 2007 · Replies 7 · Dec 7, 2007

Replies: 7

Views: 3K

Newtonian Limit of GR: Experimentally Constraining k in the Einstein Equation

Dec 5, 2007 · Replies 9 · Dec 6, 2007

Replies: 9

Views: 4K

Constant Acceleration seen in an inertial frame

Dec 5, 2007 · Replies 11 · Dec 6, 2007

Replies: 11

Views: 4K

Where Do Closed Timelike Curves Go?

Nov 30, 2007 · Replies 15 · Dec 5, 2007

Replies: 15

Views: 4K

Derivation of the Teukolsky Equation

Nov 27, 2007 · Replies 4 · Dec 5, 2007

Replies: 4

Views: 7K

Lorentz Transform in Non-Minkowski Spaces

Dec 3, 2007 · Replies 5 · Dec 5, 2007

Replies: 5

Views: 4K

Derivation of Lorentz Transformation

Dec 1, 2007 · Replies 8 · Dec 5, 2007

Replies: 8

Views: 4K

2 Masses accelerating to eachother

Dec 3, 2007 · Replies 15 · Dec 5, 2007

Replies: 15

Views: 6K

How Does Special Relativity Explain the Michelson-Morley Experiment Results?

Dec 4, 2007 · Replies 2 · Dec 4, 2007

Replies: 2

Views: 2K

Is Light Speed Fixed? - Physics for the Lay Person

Aug 17, 2007 · Replies 9 · Dec 4, 2007

Replies: 9

Views: 6K

Why is the speed of light limited in physics?

Nov 20, 2007 · Replies 24 · Dec 4, 2007

Replies: 24

Views: 6K

My 9-year-old son has a physics questions that I couldn't answer

Dec 2, 2007 · Replies 4 · Dec 3, 2007

Replies: 4

Views: 4K

Which solutions of GR are experimentally tested

Dec 2, 2007 · Replies 3 · Dec 2, 2007

Replies: 3

Views: 3K

Linearized gravity / Linearized Einstein Field Equations / GEM

Dec 1, 2007 · Replies 1 · Dec 1, 2007

Replies: 1

Views: 4K

Considering Relative Simultaneity - Relying on clocks instead of observers

Jul 23, 2007 · Replies 16 · Dec 1, 2007

Replies: 16

Views: 7K

Do Cosmological Assumptions Affect Conservation Laws?

Nov 30, 2007 · Replies 1 · Nov 30, 2007

Replies: 1

Views: 4K

Tidal Effects of Non-Uniform Gravitational Fields in Free-falling Coaches

Nov 29, 2007 · Replies 13 · Nov 30, 2007

Replies: 13

Views: 5K

Rotational Kinematics: Finding KE in SR

Apr 12, 2004 · Replies 24 · Nov 29, 2007

Replies: 24

Views: 10K

Light Slowed to 70 Km/h: Causes & Effects

Nov 29, 2007 · Replies 3 · Nov 29, 2007

Replies: 3

Views: 4K

Topology of closed timelike curves (CTC)

Nov 26, 2007 · Replies 3 · Nov 27, 2007

Replies: 3

Views: 4K

How Does the Twin Paradox Challenge Our Understanding of Time Dilation?

Nov 26, 2007 · Replies 6 · Nov 27, 2007

Replies: 6

Views: 3K

Could a moving object become a black hole?

Nov 27, 2007 · Replies 2 · Nov 27, 2007

Replies: 2

Views: 4K

Why the metric is covariantly constant?

Nov 22, 2007 · Replies 7 · Nov 26, 2007

Replies: 7

Views: 8K

Topology outside vs inside black hole

Nov 23, 2007 · Replies 5 · Nov 26, 2007

Replies: 5

Views: 5K

Understanding the Frame Dependence of the Speed of Light in a Medium

Nov 24, 2007 · Replies 2 · Nov 26, 2007

Replies: 2

Views: 4K

Is Einstein's etheric model of GR compatible with modern physics?

Nov 25, 2007 · Replies 7 · Nov 25, 2007

Replies: 7

Views: 3K

Does a photon slow down when absorbed?

Nov 24, 2007 · Replies 2 · Nov 25, 2007

Replies: 2

Views: 3K

Can somebody read this and tell me the flaw in the argument?

Nov 18, 2007 · Replies 11 · Nov 24, 2007

Replies: 11

Views: 4K

Does Time Slow Down Near a Black Hole?

Nov 1, 2007 · Replies 36 · Nov 24, 2007

2

Replies: 36

Views: 8K

Time Dilation: If You Go to Space, What Happens to Time?

Nov 24, 2007 · Replies 7 · Nov 24, 2007

Replies: 7

Views: 3K

Is the speed of light constant?

Sep 7, 2007 · Replies 42 · Nov 24, 2007

2

Replies: 42

Views: 11K

What happens to kinetic energy in the case of a photon?

Nov 21, 2007 · Replies 27 · Nov 23, 2007

Replies: 27

Views: 6K

Could photons emitted by high velocity electrons have a specific emission angle?

Nov 22, 2007 · Replies 3 · Nov 23, 2007

Replies: 3

Views: 2K

Slowing Down a Photon - Does It Make Sense?

Nov 3, 2007 · Replies 7 · Nov 23, 2007

Replies: 7

Views: 6K

Understanding the Concept of 4-Vectors in Physics: A Mathematical Perspective

Nov 22, 2007 · Replies 12 · Nov 23, 2007

Replies: 12

Views: 4K

Calculating Black Hole Gravity: Velocity > Light Speed?

Nov 22, 2007 · Replies 2 · Nov 22, 2007

Replies: 2

Views: 2K

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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