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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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Interaction Energy how does it transform between inertial frames?

May 11, 2006 · Replies 3 · May 11, 2006

Replies: 3

Views: 3K

Ellis on an evolving block universe (gr-qc/0605049)

May 9, 2006 · Replies 4 · May 10, 2006

Replies: 4

Views: 4K

How Do Particle Physicists Measure the Relativistic Energy of Tardyons?

May 9, 2006 · Replies 5 · May 10, 2006

Replies: 5

Views: 3K

What is the dimension of the spacetime interval?

May 7, 2006 · Replies 10 · May 8, 2006

Replies: 10

Views: 8K

Gravity Explained: Why Objects Fall

May 6, 2006 · Replies 16 · May 8, 2006

Replies: 16

Views: 6K

What is a Simple Explanation of General Relativity for High School Students?

May 2, 2006 · Replies 5 · May 7, 2006

Replies: 5

Views: 2K

Penrose Diagram for Schwarzschild

May 5, 2006 · Replies 3 · May 6, 2006

Replies: 3

Views: 8K

Question on Spatial Curvature: Laser Experiment on a Spaceship

May 4, 2006 · Replies 10 · May 5, 2006

Replies: 10

Views: 3K

See-saw problem in special relativity

May 5, 2006 · Replies 10 · May 5, 2006

Replies: 10

Views: 4K

Aether theories which are experimentally indistinguishable from SR.

Dec 29, 2004 · Replies 176 · May 5, 2006

6

Replies: 176

Views: 26K

What is the Gravitational Acceleration Beyond the Event Horizon of a Black Hole?

Apr 30, 2006 · Replies 3 · May 4, 2006

Replies: 3

Views: 3K

Can gravity bend the path of light?

Apr 28, 2006 · Replies 16 · May 4, 2006

Replies: 16

Views: 6K

Relativistic momentum definition

Apr 29, 2006 · Replies 14 · May 4, 2006

Replies: 14

Views: 5K

Can We Measure the Elusive Gravitational Waves?

May 2, 2006 · Replies 6 · May 3, 2006

Replies: 6

Views: 2K

Can Approaching the Speed of Light Prohibit Time Travel?

Apr 16, 2006 · Replies 22 · May 3, 2006

Replies: 22

Views: 5K

Photon and electron racing show

May 2, 2006 · Replies 3 · May 2, 2006

Replies: 3

Views: 3K

Hypothetical Question. Creating Gravity and power supplies

May 1, 2006 · Replies 6 · May 2, 2006

Replies: 6

Views: 3K

Could black holes be the key to time travel and the Big Bang?

Apr 28, 2006 · Replies 4 · May 1, 2006

Replies: 4

Views: 3K

Understanding Newton's Laws in Non-Inertial Reference Frames

Apr 29, 2006 · Replies 2 · May 1, 2006

Replies: 2

Views: 2K

How does light travel at a constant speed without mass or inertia?

Apr 30, 2006 · Replies 5 · Apr 30, 2006

Replies: 5

Views: 3K

What Are the Absorption Peaks of Gravitational Radiation Passing Through Earth?

Apr 29, 2006 · Replies 3 · Apr 30, 2006

Replies: 3

Views: 3K

Mass in Relativity: Bucherer's Experiment Result

Apr 30, 2006 · Replies 5 · Apr 30, 2006

Replies: 5

Views: 2K

Can an object become a black hole by reaching 99.9% the speed of light?

Apr 30, 2006 · Replies 1 · Apr 30, 2006

Replies: 1

Views: 2K

What is the D'Alembert operator

Apr 30, 2006 · Replies 4 · Apr 30, 2006

Replies: 4

Views: 14K

Challenging Einstein? New Model of Space & Time

Sep 2, 2005 · Replies 16 · Apr 30, 2006

Replies: 16

Views: 6K

A quick question on the twin paradox (quick I promise)

Apr 29, 2006 · Replies 7 · Apr 29, 2006

Replies: 7

Views: 5K

Could Time Travel Create Extra Matter and Energy in the Universe?

Apr 28, 2006 · Replies 5 · Apr 29, 2006

Replies: 5

Views: 2K

Explain to me how a sphere can exist in higher dimensions?

Apr 28, 2006 · Replies 2 · Apr 29, 2006

Replies: 2

Views: 2K

Understanding the Twins Paradox: Time Travel and Relativity in Space

Apr 28, 2006 · Replies 2 · Apr 28, 2006

Replies: 2

Views: 2K

Understanding Accelerated Motion in Relativity

Apr 22, 2006 · Replies 12 · Apr 27, 2006

Replies: 12

Views: 4K

Can SR be derived from other postulates than the constancy of c

Apr 27, 2006 · Replies 6 · Apr 27, 2006

Replies: 6

Views: 3K

Conservation laws and relativistic dynamics

Apr 23, 2006 · Replies 12 · Apr 27, 2006

Replies: 12

Views: 3K

How Does Time Dilation Affect Thermal Equilibrium in Gravitational Fields?

Apr 25, 2006 · Replies 6 · Apr 26, 2006

Replies: 6

Views: 4K

Curvature without tidal forces

Apr 26, 2006 · Replies 4 · Apr 26, 2006

Replies: 4

Views: 3K

Twin Paradox: Earth-Twin vs Space-Twin Aging

Apr 17, 2006 · Replies 3 · Apr 26, 2006

Replies: 3

Views: 2K

What is the optimal speed for interstellar travel?

Apr 25, 2006 · Replies 16 · Apr 25, 2006

Replies: 16

Views: 3K

What Are Your Thoughts on Dual Meanings in Physics Terminology?

Apr 22, 2006 · Replies 11 · Apr 24, 2006

Replies: 11

Views: 2K

Light Barrier: Breaking the Speed of Light?

Apr 21, 2006 · Replies 3 · Apr 23, 2006

Replies: 3

Views: 6K

Is K in Bondi K Calculus Constant Due to Homogeneity and Isotropy of Spacetime?

Apr 22, 2006 · Replies 1 · Apr 22, 2006

Replies: 1

Views: 2K

Mass of Photon: Is 0 Rest Mass Possible?

Apr 19, 2006 · Replies 44 · Apr 22, 2006

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Replies: 44

Views: 6K

Why Do Velocity & Momentum Equations Need Revision?

Apr 18, 2006 · Replies 6 · Apr 21, 2006

Replies: 6

Views: 5K

Non-Rotating Charged Black Holes: Mass, Electric Field, & Quantum Charges

Apr 21, 2006 · Replies 2 · Apr 21, 2006

Replies: 2

Views: 3K

Why is there a k in Bondi k calculus?

Apr 13, 2006 · Replies 17 · Apr 20, 2006

Replies: 17

Views: 7K

Can Photons from a Laser Distort Space-Time Like Massive Objects?

Apr 20, 2006 · Replies 4 · Apr 20, 2006

Replies: 4

Views: 2K

Time Travel Questions: Does Age Change with Speed?

Apr 17, 2006 · Replies 22 · Apr 20, 2006

Replies: 22

Views: 4K

How Do Killing Vectors Affect Geodesic Deviation?

Apr 12, 2006 · Replies 4 · Apr 19, 2006

Replies: 4

Views: 4K

When the photon is born on the horizon .bang?

Apr 19, 2006 · Replies 2 · Apr 19, 2006

Replies: 2

Views: 2K

Energy, momentum, & mass of a box of moving particles

Apr 17, 2006 · Replies 7 · Apr 19, 2006

Replies: 7

Views: 4K

What Is the Orbital Period for Circular Orbits Around Black Holes?

Apr 18, 2006 · Replies 7 · Apr 18, 2006

Replies: 7

Views: 8K

Potential energy contributes to the mass

Apr 18, 2006 · Replies 5 · Apr 18, 2006

Replies: 5

Views: 2K

Time an Illusion? Einstein Explains Why According to Relativity

Apr 15, 2006 · Replies 17 · Apr 17, 2006

Replies: 17

Views: 5K

What is the exact definition of mass?

Apr 15, 2006 · Replies 9 · Apr 17, 2006

Replies: 9

Views: 4K

Here's the way to go faster than light

Apr 16, 2006 · Replies 7 · Apr 17, 2006

Replies: 7

Views: 3K

Reaching the Speed of Light: Can We Achieve C?

Apr 16, 2006 · Replies 12 · Apr 17, 2006

Replies: 12

Views: 3K

Understand Mach's Principle: What does it Mean?

Apr 4, 2006 · Replies 31 · Apr 17, 2006

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Replies: 31

Views: 6K

Understanding Gravitational Waves & Self-Taught GR

Mar 21, 2006 · Replies 9 · Apr 16, 2006

Replies: 9

Views: 3K

Can We Really Time Travel by Exceeding the Speed of Light?

Apr 15, 2006 · Replies 2 · Apr 15, 2006

Replies: 2

Views: 2K

Lightspeed: does the definition of time make it constant?

Apr 14, 2006 · Replies 3 · Apr 15, 2006

Replies: 3

Views: 3K

How to show something transforms as a covector?

Apr 15, 2006 · Replies 4 · Apr 15, 2006

Replies: 4

Views: 2K

Photon Mass: Is Student Learning Misleading?

Apr 3, 2006 · Replies 49 · Apr 14, 2006

2

Replies: 49

Views: 8K

Check Out This Link - A Puzzling Argument

Apr 9, 2006 · Replies 13 · Apr 14, 2006

Replies: 13

Views: 3K

Why is light's speed the fastest speed?

Apr 6, 2006 · Replies 10 · Apr 13, 2006

Replies: 10

Views: 12K

Man Running on a Train: Clocks and Velocity

Apr 11, 2006 · Replies 24 · Apr 13, 2006

Replies: 24

Views: 7K

Is Lorentz Contraction Real in the Frame of Reference of a Moving Object?

Apr 11, 2006 · Replies 11 · Apr 12, 2006

Replies: 11

Views: 3K

About the geometry of general relativity

Apr 11, 2006 · Replies 7 · Apr 12, 2006

Replies: 7

Views: 5K

Uncovering the Mystery: Slowing Time on a Plane Explained

Apr 10, 2006 · Replies 8 · Apr 11, 2006

Replies: 8

Views: 3K

Can objects catch up with their own photons?

Apr 9, 2006 · Replies 7 · Apr 11, 2006

Replies: 7

Views: 2K

Anisotropy of the speed of light?

Apr 10, 2006 · Replies 12 · Apr 11, 2006

Replies: 12

Views: 5K

Curved Space Model: Explaining Gravity & Magnetic Force

Apr 9, 2006 · Replies 7 · Apr 10, 2006

Replies: 7

Views: 2K

C vs. Fiber Optics: Speed Comparison and Myths Debunked

Apr 9, 2004 · Replies 15 · Apr 10, 2006

Replies: 15

Views: 5K

How can magnetic field be a relativistic phenomenon?

Apr 5, 2006 · Replies 8 · Apr 9, 2006

Replies: 8

Views: 7K

Slowing Photons: A Look at Light Speed Rockets & Measuring Slower Speeds

Apr 9, 2006 · Replies 1 · Apr 9, 2006

Replies: 1

Views: 3K

Two speed of light experiments at different altitudes

Apr 8, 2006 · Replies 10 · Apr 9, 2006

Replies: 10

Views: 5K

Final Theory and Orbital Mechanics

Apr 6, 2006 · Replies 13 · Apr 8, 2006

Replies: 13

Views: 3K

Do Photons Have Mass and Kinetic Energy?

Apr 6, 2006 · Replies 10 · Apr 8, 2006

Replies: 10

Views: 3K

What will happen to time if we travel away from Earth at 0.9999c?

Apr 1, 2006 · Replies 31 · Apr 7, 2006

2

Replies: 31

Views: 4K

Can two galaxies receded from one another faster than C?

Mar 14, 2006 · Replies 35 · Apr 6, 2006

2

Replies: 35

Views: 7K

Consistency of the speed of light

Sep 12, 2005 · Replies 431 · Apr 5, 2006

15

Replies: 431

Views: 55K

How Quickly Does Gravity Propagate?

Apr 4, 2006 · Replies 3 · Apr 5, 2006

Replies: 3

Views: 3K

Palatini Formalism generalizes GR to include degenerate metric?

Apr 3, 2006 · Replies 4 · Apr 5, 2006

Replies: 4

Views: 3K

Gravitational Equivalent of Magnetic Field Measured in Lab

Mar 23, 2006 · Replies 20 · Apr 3, 2006

Replies: 20

Views: 4K

How does a body escape its gravitational field?

Mar 25, 2006 · Replies 8 · Apr 3, 2006

Replies: 8

Views: 3K

Relative Speeds and the Limit of Light

Apr 3, 2006 · Replies 2 · Apr 3, 2006

Replies: 2

Views: 2K

Derieving relativistic electrodynamics equations

Mar 31, 2006 · Replies 17 · Apr 2, 2006

Replies: 17

Views: 4K

Can Muon Decay Experiments Disprove the Existence of an Absolute Time Frame?

Mar 31, 2006 · Replies 2 · Mar 31, 2006

Replies: 2

Views: 2K

Is Relativity an Illusion or Reality?

Mar 27, 2006 · Replies 7 · Mar 30, 2006

Replies: 7

Views: 3K

What is the Flaw of General Relativity Regarding Uniform Gravitational Fields?

Mar 24, 2006 · Replies 85 · Mar 29, 2006

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Replies: 85

Views: 11K

Teaching Special Relativity: Balancing Theory, History, and Experimentation

Mar 2, 2006 · Replies 29 · Mar 29, 2006

Replies: 29

Views: 8K

Velocity of Light in Accelerating Spaceship & Inertial Frames in GR

Mar 26, 2006 · Replies 5 · Mar 27, 2006

Replies: 5

Views: 2K

Gravity & Geodesics: How the Earth Maximizes Proper Time

Feb 24, 2006 · Replies 17 · Mar 23, 2006

Replies: 17

Views: 4K

The Science Behind Time Dilation: How Does Time Stop at the Speed of Light?

Feb 9, 2006 · Replies 87 · Mar 22, 2006

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Replies: 87

Views: 22K

Could the expansion of space impact the distance between the Earth and the sun?

Mar 20, 2006 · Replies 4 · Mar 22, 2006

Replies: 4

Views: 2K

Discover the Method to Derive E=mc^2 - A Comprehensive Guide

Mar 18, 2006 · Replies 2 · Mar 22, 2006

Replies: 2

Views: 3K

Geodesics in schwarzschild solution

Mar 21, 2006 · Replies 2 · Mar 21, 2006

Replies: 2

Views: 8K

Gravitational Field of a Spinning Mass: Exploring the Math

Mar 21, 2006 · Replies 1 · Mar 21, 2006

Replies: 1

Views: 3K

Perspective of Massless objects

Mar 21, 2006 · Replies 9 · Mar 21, 2006

Replies: 9

Views: 3K

Weight of Hot Body: Balance in Thermal Equilibrium?

Mar 21, 2006 · Replies 1 · Mar 21, 2006

Replies: 1

Views: 2K

What about this Final Theory thing?

Mar 20, 2006 · Replies 1 · Mar 20, 2006

Replies: 1

Views: 2K

Time Is Relative: What Does It Mean?

Mar 19, 2006 · Replies 1 · Mar 20, 2006

Replies: 1

Views: 2K

Topology of de Sitter and black hole

Mar 18, 2006 · Replies 1 · Mar 18, 2006

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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