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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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Spinning wheel and light speed

May 13, 2005 · Replies 12 · May 14, 2005

Replies: 12

Views: 10K

What is the causal structure of a black hole collapse?

May 11, 2005 · Replies 14 · May 14, 2005

Replies: 14

Views: 5K

What programs are most successfull for visualization physical processess?

May 11, 2005 · Replies 3 · May 12, 2005

Replies: 3

Views: 2K

Curvatures in spacetime explained by momentum?

May 2, 2005 · Replies 11 · May 12, 2005

Replies: 11

Views: 3K

Does Relativity Affect Energy Conservation in Gravity-Driven Systems?

May 10, 2005 · Replies 7 · May 12, 2005

Replies: 7

Views: 2K

Time dilation and radioactive decay

May 11, 2005 · Replies 4 · May 11, 2005

Replies: 4

Views: 5K

Relativistic velocity in the time dimension

Apr 29, 2005 · Replies 17 · May 11, 2005

Replies: 17

Views: 4K

What if gravity worked differently?

May 4, 2005 · Replies 36 · May 11, 2005

2

Replies: 36

Views: 7K

Gravity & Light: Does Gravitational Field Slow Down?

May 10, 2005 · Replies 3 · May 11, 2005

Replies: 3

Views: 3K

Is Time the Only 4th Dimension in Relativity?

May 9, 2005 · Replies 7 · May 11, 2005

Replies: 7

Views: 3K

Perception and Proximity near a Black Hole: A Curious Exploration

May 10, 2005 · Replies 4 · May 10, 2005

Replies: 4

Views: 2K

On photons in perpendicular directions

Apr 3, 2005 · Replies 3 · May 10, 2005

Replies: 3

Views: 3K

Do White Holes Create Lumps in Spacetime?

May 4, 2005 · Replies 15 · May 10, 2005

Replies: 15

Views: 4K

What Happens When You Cross a Black Hole's Event Horizon?

Apr 26, 2005 · Replies 30 · May 10, 2005

2

Replies: 30

Views: 4K

Relativistic Electrons: Kinetic Energy & 20keV Threshold

Apr 28, 2005 · Replies 20 · May 10, 2005

Replies: 20

Views: 15K

Does increased velocity increase gravity?

May 5, 2005 · Replies 10 · May 9, 2005

Replies: 10

Views: 17K

Gravity and the scale of matter.

Apr 24, 2005 · Replies 14 · May 8, 2005

Replies: 14

Views: 3K

Derivation of Christoffel symbol

May 7, 2005 · Replies 10 · May 7, 2005

Replies: 10

Views: 9K

How Does Near-Light Speed Affect Satellite Pulse Reception on Earth?

May 6, 2005 · Replies 7 · May 7, 2005

Replies: 7

Views: 2K

Curving space - it is the Higgs?

Apr 29, 2005 · Replies 2 · May 7, 2005

Replies: 2

Views: 2K

Question about Proper Time and Rest Frame selection.

May 3, 2005 · Replies 11 · May 6, 2005

Replies: 11

Views: 5K

Light always wants to travel in a straight line

May 5, 2005 · Replies 8 · May 6, 2005

Replies: 8

Views: 2K

Gravitational Field & Mass Interaction: Analogy of Space Curvature

May 5, 2005 · Replies 9 · May 6, 2005

Replies: 9

Views: 2K

Mass Transference: Can Light be Converted to Matter?

May 5, 2005 · Replies 6 · May 6, 2005

Replies: 6

Views: 2K

Gravity is really curves in space time

May 2, 2005 · Replies 14 · May 5, 2005

Replies: 14

Views: 2K

Can Time Travel into the Past Ever Be Possible?

Apr 27, 2005 · Replies 44 · May 5, 2005

2

Replies: 44

Views: 7K

Is space dependent on the presence of matter?

Apr 30, 2005 · Replies 11 · May 5, 2005

Replies: 11

Views: 4K

Finding the contraction formula using proper time

Apr 30, 2005 · Replies 16 · May 4, 2005

Replies: 16

Views: 4K

Photon Energy when Doppler Shifted

Apr 13, 2005 · Replies 35 · May 2, 2005

2

Replies: 35

Views: 12K

Crossing the Horizon on a Street of Houses: Last House Passed

Apr 27, 2005 · Replies 28 · May 2, 2005

Replies: 28

Views: 9K

General Relativity and Theory of Spinors

Feb 6, 2005 · Replies 14 · May 1, 2005

Replies: 14

Views: 5K

Length contraction and time dilation

Apr 29, 2005 · Replies 7 · Apr 30, 2005

Replies: 7

Views: 4K

Objects turning into a black hole near the speed of light?

Apr 26, 2005 · Replies 33 · Apr 29, 2005

2

Replies: 33

Views: 7K

Information needed on two wheels and chain apparent paradox in SR

Apr 28, 2005 · Replies 14 · Apr 28, 2005

Replies: 14

Views: 2K

What Caused the Big Bang and Is the Universe Infinite?

Apr 27, 2005 · Replies 6 · Apr 28, 2005

Replies: 6

Views: 3K

Closed Orbit Light Rays in Schwarzschild Metric - Help Needed

Apr 21, 2005 · Replies 2 · Apr 28, 2005

Replies: 2

Views: 3K

Confused with General Relativities explanation of Gravity

Apr 28, 2005 · Replies 6 · Apr 28, 2005

Replies: 6

Views: 2K

The energy-momentum tensor and the equivalence principle

Apr 26, 2005 · Replies 23 · Apr 28, 2005

Replies: 23

Views: 5K

What Makes the Twin Paradox a Paradox in Einstein's Theory of Relativity?

Apr 22, 2005 · Replies 15 · Apr 28, 2005

Replies: 15

Views: 4K

Temperature and observer velocity

Apr 16, 2005 · Replies 8 · Apr 28, 2005

Replies: 8

Views: 2K

Equivalence without relativity

Apr 26, 2005 · Replies 12 · Apr 28, 2005

Replies: 12

Views: 2K

What is Space? A Theory Exploration

Dec 7, 2004 · Replies 54 · Apr 28, 2005

2

Replies: 54

Views: 6K

Are SR & GR Considered Experimentally Proven?

Apr 26, 2005 · Replies 16 · Apr 26, 2005

Replies: 16

Views: 4K

General relativity mathematics : physically acceptable ?

Apr 24, 2005 · Replies 16 · Apr 26, 2005

Replies: 16

Views: 4K

Age of the universe - absolute or relative?

Apr 25, 2005 · Replies 6 · Apr 26, 2005

Replies: 6

Views: 7K

Uncovering the Truth: Laws of Time and Space in Relation to Motion

Apr 12, 2005 · Replies 27 · Apr 25, 2005

Replies: 27

Views: 7K

Does the equivalence principle hold for charged particles?

Apr 18, 2005 · Replies 30 · Apr 25, 2005

2

Replies: 30

Views: 7K

Time Dilation: Gravity's Effect on Time

Apr 17, 2005 · Replies 5 · Apr 24, 2005

Replies: 5

Views: 3K

Can a New Gravity Theory Rival Einstein's Predictions?

Apr 22, 2005 · Replies 7 · Apr 22, 2005

Replies: 7

Views: 3K

So confused: Tensors and reletivistic cosmology

Apr 22, 2005 · Replies 7 · Apr 22, 2005

Replies: 7

Views: 2K

Does Time Expand? Universe Expansion Explained

Apr 11, 2005 · Replies 34 · Apr 22, 2005

2

Replies: 34

Views: 16K

Can a Centrifuge Experiment Demonstrate Reciprocity in Special Relativity?

Apr 20, 2005 · Replies 14 · Apr 21, 2005

Replies: 14

Views: 7K

Components and basis transform differently

Apr 21, 2005 · Replies 4 · Apr 21, 2005

Replies: 4

Views: 2K

Cosmological Questions and Their Degenerate Answers

Apr 14, 2005 · Replies 32 · Apr 21, 2005

2

Replies: 32

Views: 4K

How can I plot the altitude of a capsule during re-entry?

Apr 21, 2005 · Replies 2 · Apr 21, 2005

Replies: 2

Views: 2K

Why the speed of light is so fast?

Apr 13, 2005 · Replies 12 · Apr 20, 2005

Replies: 12

Views: 3K

Solving Ball's Shadow: Theoretical Analysis

Apr 19, 2005 · Replies 2 · Apr 19, 2005

Replies: 2

Views: 3K

Geometry vs Particles: Einstein's Perspective on Gravity

Apr 19, 2005 · Replies 3 · Apr 19, 2005

Replies: 3

Views: 2K

Good online report about wormholes?

Mar 31, 2005 · Replies 7 · Apr 19, 2005

Replies: 7

Views: 3K

Inhomogeneous and anisotropic dust models

Apr 14, 2005 · Replies 6 · Apr 19, 2005

Replies: 6

Views: 2K

Electron in Earth Orbit: Does it Emit Radiation?

Apr 18, 2005 · Replies 4 · Apr 19, 2005

Replies: 4

Views: 3K

Viewing the Big Bang? Answers for AstroGeek Toby

Apr 19, 2005 · Replies 2 · Apr 19, 2005

Replies: 2

Views: 4K

Relativistic Force and Acceleration: Understanding the Relationship

Apr 18, 2005 · Replies 3 · Apr 18, 2005

Replies: 3

Views: 2K

How Time Passes Differently for Twins Traveling at Light Speed

Apr 3, 2005 · Replies 105 · Apr 17, 2005

4

Replies: 105

Views: 11K

A wrong statement regarding SR.

Apr 16, 2005 · Replies 3 · Apr 16, 2005

Replies: 3

Views: 2K

How does the weight of a rock change in relativistic speeds?

Mar 29, 2005 · Replies 6 · Apr 15, 2005

Replies: 6

Views: 2K

The Physics of Falling into a Black Hole: Time Dilation and the Event Horizon

Apr 11, 2005 · Replies 22 · Apr 15, 2005

Replies: 22

Views: 6K

A new epistemology of Relativity

Apr 5, 2005 · Replies 4 · Apr 15, 2005

Replies: 4

Views: 2K

Is Temperature Independent of Observer Velocity in Relativity?

Apr 9, 2005 · Replies 5 · Apr 15, 2005

Replies: 5

Views: 2K

Limit as the Speed of Light becomes Infinite

Apr 12, 2005 · Replies 11 · Apr 14, 2005

Replies: 11

Views: 4K

Do black holes affect the path of photons and neutrinos?

Apr 6, 2005 · Replies 15 · Apr 14, 2005

Replies: 15

Views: 4K

Charged particle moving relativistically through E field

Apr 13, 2005 · Replies 3 · Apr 14, 2005

Replies: 3

Views: 5K

Is Time Dilation Affected by Varying Mass Density in Identical Universes?

Apr 6, 2005 · Replies 2 · Apr 13, 2005

Replies: 2

Views: 3K

Absolute motion, is it detectable?

Apr 7, 2005 · Replies 14 · Apr 11, 2005

Replies: 14

Views: 5K

Can an Event be in one frame and not be in another?

Apr 11, 2005 · Replies 4 · Apr 11, 2005

Replies: 4

Views: 2K

Special relativity- time expansion

Apr 7, 2005 · Replies 4 · Apr 11, 2005

Replies: 4

Views: 7K

What I tell laymen who ask me about SR

Jan 15, 2005 · Replies 35 · Apr 10, 2005

2

Replies: 35

Views: 10K

Energy conservation in General relativity

Apr 9, 2005 · Replies 6 · Apr 10, 2005

Replies: 6

Views: 6K

Special relativity and substitution

Apr 7, 2005 · Replies 5 · Apr 10, 2005

Replies: 5

Views: 2K

Mach's Principle: Inertia, Newton, Einstein & Gedanken Experiments

Mar 27, 2005 · Replies 81 · Apr 9, 2005

3

Replies: 81

Views: 13K

Understanding Time Dilation in Special Relativity

Apr 5, 2005 · Replies 10 · Apr 8, 2005

Replies: 10

Views: 5K

Speed of light measured the same by all inertial observers?

Apr 7, 2005 · Replies 6 · Apr 7, 2005

Replies: 6

Views: 2K

Calculating Arrival Time Difference for Particles Produced in a Distant Galaxy

Apr 6, 2005 · Replies 5 · Apr 7, 2005

Replies: 5

Views: 2K

Questions About Speed of Light & Time

Apr 4, 2005 · Replies 35 · Apr 7, 2005

2

Replies: 35

Views: 5K

Why does refraction of light involve a difference in speed?

Apr 7, 2005 · Replies 3 · Apr 7, 2005

Replies: 3

Views: 2K

Who does time really slow down for?

Mar 29, 2005 · Replies 22 · Apr 5, 2005

Replies: 22

Views: 6K

What are the earliest online publications discussing the Twin Paradox?

Apr 4, 2005 · Replies 2 · Apr 5, 2005

Replies: 2

Views: 2K

Time travel and cosmic strings

Mar 20, 2005 · Replies 3 · Apr 4, 2005

Replies: 3

Views: 3K

How Can I Use My Spaceship to Reset My Clock?

Mar 31, 2005 · Replies 8 · Apr 3, 2005

Replies: 8

Views: 2K

Discover the AEther Bunny: Understanding Lorentz Relativity and Twin Aging

Mar 26, 2005 · Replies 2 · Apr 2, 2005

Replies: 2

Views: 3K

How Does Time Dilation Affect Colony Ships A and B in Relativity Theory?

Mar 24, 2005 · Replies 45 · Apr 2, 2005

2

Replies: 45

Views: 5K

Does anybody have a better analogy of describing space-time curvature?

Mar 26, 2005 · Replies 9 · Apr 2, 2005

Replies: 9

Views: 7K

How Does Gravity Affect Time Near Earth's Core?

Mar 23, 2005 · Replies 2 · Mar 30, 2005

Replies: 2

Views: 3K

Time Dilation and Video Transmission in Relativistic Spaceships

Mar 30, 2005 · Replies 3 · Mar 30, 2005

Replies: 3

Views: 4K

Relativity situation. Questions.

Mar 29, 2005 · Replies 2 · Mar 30, 2005

Replies: 2

Views: 2K

Gravity & Photons: Dynamics of a Hypothetical Closed Universe

Mar 17, 2005 · Replies 13 · Mar 28, 2005

Replies: 13

Views: 4K

I know how to travel faster than light :\

Mar 26, 2005 · Replies 6 · Mar 28, 2005

Replies: 6

Views: 4K

Lorentz transformations explanation?

Mar 17, 2005 · Replies 11 · Mar 27, 2005

Replies: 11

Views: 3K

Could Time Dilation Explain the Huge Redshifts Observed in Distant Stars?

Mar 26, 2005 · Replies 7 · Mar 27, 2005

Replies: 7

Views: 3K

Energy to Matter: Unlocking E=mc^2

Mar 17, 2005 · Replies 10 · Mar 27, 2005

Replies: 10

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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