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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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Use of Special or General Relativity in QM?

Feb 11, 2008 · Replies 8 · Feb 11, 2008

Replies: 8

Views: 3K

What happens to time when gravity is absent

Jan 27, 2008 · Replies 11 · Feb 11, 2008

Replies: 11

Views: 13K

What Happens in a Relativistic Particle Collision?

Feb 10, 2008 · Replies 4 · Feb 11, 2008

Replies: 4

Views: 2K

On Pressure/Gravity/The Expanding Universe

Feb 8, 2008 · Replies 16 · Feb 10, 2008

Replies: 16

Views: 5K

Why haven't we observed distortion of objects near a black hole's event horizon?

Feb 9, 2008 · Replies 3 · Feb 10, 2008

Replies: 3

Views: 3K

Are Black Holes Made of Waveforms?

Feb 9, 2008 · Replies 4 · Feb 10, 2008

Replies: 4

Views: 3K

How Are Gravitational Waves Derived from Einstein's Field Equations?

Feb 9, 2008 · Replies 2 · Feb 9, 2008

Replies: 2

Views: 2K

Speed in Space: Relative Motion & Time Effects

Feb 5, 2008 · Replies 15 · Feb 8, 2008

Replies: 15

Views: 5K

What are the implications of rotational reference frames?

Feb 8, 2008 · Replies 3 · Feb 8, 2008

Replies: 3

Views: 3K

X' relative to S' and relative to S

Jan 25, 2008 · Replies 6 · Feb 8, 2008

Replies: 6

Views: 3K

Explaining Einstein's Choice of R_ab - 1/2 g_ab R

Feb 7, 2008 · Replies 2 · Feb 7, 2008

Replies: 2

Views: 4K

Can you actually measure an object's velocity?

Feb 7, 2008 · Replies 14 · Feb 7, 2008

Replies: 14

Views: 3K

Understanding Curl in 3D: Using Vector Operators & Components

Feb 3, 2008 · Replies 12 · Feb 7, 2008

Replies: 12

Views: 4K

Is Time Bending the 3rd Dimension in Spacetime Curvature?

Feb 6, 2008 · Replies 3 · Feb 7, 2008

Replies: 3

Views: 3K

Do wormholes really exist in spacetime?

Feb 5, 2008 · Replies 5 · Feb 6, 2008

Replies: 5

Views: 4K

Einstein's ultimate conclusion regarding ether and Relativity?

Feb 6, 2008 · Replies 1 · Feb 6, 2008

Replies: 1

Views: 3K

E&M in a Curved Space-Time: Find Books & Papers Here

Feb 5, 2008 · Replies 3 · Feb 5, 2008

Replies: 3

Views: 2K

How does a photon's event horizon look like?

Jan 30, 2008 · Replies 6 · Feb 5, 2008

Replies: 6

Views: 4K

Can Atomic Clocks Accurately Measure Time in Accelerating Bodies?

Feb 4, 2008 · Replies 2 · Feb 5, 2008

Replies: 2

Views: 4K

No seriously; Can we, maybe, go to the past?

Feb 3, 2008 · Replies 4 · Feb 4, 2008

Replies: 4

Views: 3K

Is Modern Physics Still Shaped by The Dancing Wu Li Masters?

Feb 3, 2008 · Replies 4 · Feb 4, 2008

Replies: 4

Views: 3K

Time & Space: Inseparable? Photon Existence?

Feb 2, 2008 · Replies 23 · Feb 3, 2008

Replies: 23

Views: 4K

Nature of Spacetime: Accepted View Explained

Feb 3, 2008 · Replies 2 · Feb 3, 2008

Replies: 2

Views: 3K

Why nothing is observed going back in time

Jan 27, 2008 · Replies 16 · Feb 3, 2008

Replies: 16

Views: 6K

Changing the speed of light does nothing?

Dec 17, 2004 · Replies 22 · Feb 2, 2008

Replies: 22

Views: 5K

Cosmological constant as a perfect fluid

Feb 1, 2008 · Replies 2 · Feb 1, 2008

Replies: 2

Views: 4K

Plot a point on Earth through the Universe

Feb 1, 2008 · Replies 6 · Feb 1, 2008

Replies: 6

Views: 4K

Differences between Lorentz scalars and Lorentz invariants

Feb 1, 2008 · Replies 3 · Feb 1, 2008

Replies: 3

Views: 5K

Question about Relativity and the apparent direction of light

Feb 1, 2008 · Replies 12 · Feb 1, 2008

Replies: 12

Views: 4K

What is the effect of relativity on measurements in a moving universe?

Jan 31, 2008 · Replies 8 · Feb 1, 2008

Replies: 8

Views: 3K

Relativity Concerning Small Particles

Jan 30, 2008 · Replies 2 · Feb 1, 2008

Replies: 2

Views: 2K

How does photon gain its speed in no time?

Jan 31, 2008 · Replies 16 · Feb 1, 2008

Replies: 16

Views: 4K

Why does light have invarient speed?

Dec 30, 2007 · Replies 117 · Feb 1, 2008

4

Replies: 117

Views: 44K

Q about relativistic mass increase, starship

Feb 1, 2008 · Replies 1 · Feb 1, 2008

Replies: 1

Views: 3K

Could general relativity be right simply because it explains gravity?

Jan 26, 2008 · Replies 16 · Jan 31, 2008

Replies: 16

Views: 6K

Tachyons & Photons: Time & Speed of Light

Jan 30, 2008 · Replies 21 · Jan 31, 2008

Replies: 21

Views: 8K

Why did Einstein postulate the theory of the speed of light in an at-rest frame?

Jan 22, 2008 · Replies 17 · Jan 31, 2008

Replies: 17

Views: 4K

How Does Relativity Affect Our Perception of Light and Photons?

Jan 26, 2008 · Replies 32 · Jan 31, 2008

2

Replies: 32

Views: 10K

Can Relativity Account for the Age Difference in a Big Circle?

Jan 29, 2008 · Replies 7 · Jan 31, 2008

Replies: 7

Views: 2K

Download Einstein's Essays from Annals of Physics

Jan 30, 2008 · Replies 1 · Jan 30, 2008

Replies: 1

Views: 3K

What Are the Hamilton-Jacobi Equations for General Relativity?

Jan 16, 2008 · Replies 1 · Jan 29, 2008

Replies: 1

Views: 3K

Is this a suitable explanation of relativity?

Jan 29, 2008 · Replies 2 · Jan 29, 2008

Replies: 2

Views: 4K

Problem with equivalence principle.

Dec 23, 2007 · Replies 7 · Jan 29, 2008

Replies: 7

Views: 4K

Observed Time vs Observed Duration

Jan 27, 2008 · Replies 7 · Jan 28, 2008

Replies: 7

Views: 11K

Time Dilation and space missions

Jan 17, 2008 · Replies 33 · Jan 28, 2008

2

Replies: 33

Views: 11K

Time slows down when you approach the speed of light?

Dec 30, 2007 · Replies 80 · Jan 28, 2008

3

Replies: 80

Views: 69K

Preferred Coordinates: Definition & Overview

Jan 27, 2008 · Replies 9 · Jan 28, 2008

Replies: 9

Views: 6K

Proof of Lorentz Geom. Not Holding in All Acc. Frames - Example

Jan 24, 2008 · Replies 3 · Jan 27, 2008

Replies: 3

Views: 3K

Is it not possible to travel in light speed?

Jan 25, 2008 · Replies 5 · Jan 27, 2008

Replies: 5

Views: 4K

Portal Discussion: Human at Speed of Light

Jan 27, 2008 · Replies 2 · Jan 27, 2008

Replies: 2

Views: 2K

Co-Accelerating Ships: Explaining the Problem

Feb 13, 2006 · Replies 44 · Jan 26, 2008

2

Replies: 44

Views: 13K

Maximum Non-Relativistic Speed

Jan 25, 2008 · Replies 5 · Jan 26, 2008

Replies: 5

Views: 4K

How Does Change Relate to the Relativity of Time and Entropy?

Jan 23, 2008 · Replies 18 · Jan 26, 2008

Replies: 18

Views: 8K

A question about relativity theory?

Jan 24, 2008 · Replies 5 · Jan 25, 2008

Replies: 5

Views: 2K

Einstein began looking for gravity in the electromagnetic waves

Jan 23, 2008 · Replies 3 · Jan 25, 2008

Replies: 3

Views: 3K

Is the Schwarzschild radius always constant in black holes?

Jan 21, 2008 · Replies 8 · Jan 25, 2008

Replies: 8

Views: 3K

Relativity and my Intergalactic Space Race

Jan 23, 2008 · Replies 4 · Jan 24, 2008

Replies: 4

Views: 3K

How Do Different Velocities Affect Clocks in Special Relativity?

Jan 20, 2008 · Replies 10 · Jan 24, 2008

Replies: 10

Views: 5K

Light vs Non-EM Wave Velocity and Time Dilation

Jan 23, 2008 · Replies 10 · Jan 24, 2008

Replies: 10

Views: 3K

Simulation: ray of light near black hole

Jan 23, 2008 · Replies 4 · Jan 23, 2008

Replies: 4

Views: 6K

Where can I find translated versions of the original General Relativity papers?

Jan 20, 2008 · Replies 7 · Jan 22, 2008

Replies: 7

Views: 4K

The Twin Paradox: Why Does the Travelling Twin Age Less?

Jan 18, 2008 · Replies 25 · Jan 22, 2008

Replies: 25

Views: 10K

The twins paradox and explanation

Dec 22, 2007 · Replies 22 · Jan 22, 2008

Replies: 22

Views: 6K

What is the Equation Relating Tardyon Components in Different Reference Frames?

Jan 19, 2008 · Replies 12 · Jan 22, 2008

Replies: 12

Views: 3K

Phase invariance of e.m. waves

Jan 20, 2008 · Replies 8 · Jan 22, 2008

Replies: 8

Views: 9K

Does Time Dilation Occur with Uniform Motion?

Jan 21, 2008 · Replies 4 · Jan 21, 2008

Replies: 4

Views: 3K

Light Speed Paradox: Explaining Newtonic Physics

Jan 17, 2008 · Replies 14 · Jan 20, 2008

Replies: 14

Views: 6K

What is the relative velocity of two observers with given object velocities?

Jan 13, 2008 · Replies 51 · Jan 20, 2008

2

Replies: 51

Views: 12K

Postulate and special relativity

Jan 11, 2008 · Replies 26 · Jan 19, 2008

Replies: 26

Views: 6K

Why Is the Riemann Tensor Contracted in the Einstein Field Equations?

Jan 18, 2008 · Replies 1 · Jan 19, 2008

Replies: 1

Views: 7K

From one space dimension to two space dimensions in special relativity

Jan 13, 2008 · Replies 8 · Jan 18, 2008

Replies: 8

Views: 6K

Just how many different theories of gravity are there?

Dec 25, 2007 · Replies 13 · Jan 18, 2008

Replies: 13

Views: 9K

Thoughts (of an amateur) on the Solution to the Twin Paradox

Jan 15, 2008 · Replies 10 · Jan 17, 2008

Replies: 10

Views: 4K

Stress energy tensor for rotating disc

Jan 17, 2008 · Replies 1 · Jan 17, 2008

Replies: 1

Views: 4K

How Does Speed Affect Time Dilation?

Jan 4, 2008 · Replies 17 · Jan 17, 2008

Replies: 17

Views: 5K

Deriving Length Contraction: Is There Another Way?

Jan 15, 2008 · Replies 8 · Jan 17, 2008

Replies: 8

Views: 8K

Relativity Stumper for you Einsteins

Jan 11, 2008 · Replies 9 · Jan 16, 2008

Replies: 9

Views: 3K

Galilean vs Lorentz transformation equations

Dec 13, 2007 · Replies 8 · Jan 15, 2008

Replies: 8

Views: 10K

Is the direction of a pulse from a laser pen dependent on the observer?

Jan 2, 2008 · Replies 26 · Jan 15, 2008

Replies: 26

Views: 6K

How does the Gravitational Wave Rocket work?

Jan 14, 2008 · Replies 2 · Jan 14, 2008

Replies: 2

Views: 3K

Gravitational Self-Interaction

Jan 12, 2008 · Replies 8 · Jan 14, 2008

Replies: 8

Views: 5K

Why can't we see objects fall into a black hole?

Jan 13, 2008 · Replies 6 · Jan 14, 2008

Replies: 6

Views: 4K

Download GR Video Lectures | Free Resources

Jan 4, 2008 · Replies 7 · Jan 14, 2008

Replies: 7

Views: 11K

Could a Special Mirror in Electromagnetic Waves Explain the Lorentz Factor?

Jan 12, 2008 · Replies 4 · Jan 14, 2008

Replies: 4

Views: 3K

Is Gravity Just Another Form of Acceleration?

Jan 9, 2008 · Replies 18 · Jan 13, 2008

Replies: 18

Views: 8K

Where does time travel fastest? And a moving galaxy/light speed question.

Jan 12, 2008 · Replies 3 · Jan 13, 2008

Replies: 3

Views: 7K

Special Relativity: Explaining 4Potential as a 4Vector

Dec 29, 2007 · Replies 14 · Jan 12, 2008

Replies: 14

Views: 5K

How is time and space affected by the warps in General Relativity?

Jan 11, 2008 · Replies 16 · Jan 12, 2008

Replies: 16

Views: 5K

Can Kinetic Energy Differences Cause a Wormhole to Collapse in Science Fiction?

Jan 11, 2008 · Replies 1 · Jan 12, 2008

Replies: 1

Views: 2K

Does a sphere maintain its shape when viewed at high speeds?

Jan 11, 2008 · Replies 24 · Jan 12, 2008

Replies: 24

Views: 4K

What is Gravity? Understanding the Basics

Jan 4, 2008 · Replies 14 · Jan 12, 2008

Replies: 14

Views: 4K

New View on Gravity: Warped Space-Time Continuum

Jan 4, 2008 · Replies 25 · Jan 11, 2008

Replies: 25

Views: 5K

Gravitomagnetism and quantum theory of gravity?

Jan 7, 2008 · Replies 6 · Jan 9, 2008

Replies: 6

Views: 3K

What Happens to Aging in the Twin Paradox When Both Twins Accelerate?

Jan 9, 2008 · Replies 5 · Jan 9, 2008

Replies: 5

Views: 3K

Formalizing Special and General Relativity: Axioms and Conservation Laws

Jan 7, 2008 · Replies 10 · Jan 8, 2008

Replies: 10

Views: 3K

What would the universe look like from the perspective of a photon observer?

Jan 6, 2008 · Replies 31 · Jan 8, 2008

2

Replies: 31

Views: 16K

Gravity Well & Speed of Light: Questions & Answers

Jan 3, 2008 · Replies 3 · Jan 8, 2008

Replies: 3

Views: 3K

Lorentz Transformation: Conservation of Inner Product?

Jan 7, 2008 · Replies 1 · Jan 7, 2008

Replies: 1

Views: 3K

Kerr solution as complex transformation

Jan 6, 2008 · Replies 1 · Jan 7, 2008

Replies: 1

Views: 3K

Do Photons Coexist in the Same Space?

Jan 6, 2008 · Replies 3 · Jan 6, 2008

Replies: 3

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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