Menu

Navigation

More options

Style variation

Contact us

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.

Filters

Graduate What are the functions of Boyer-Linquist coordinates?

Jun 1, 2005 · Replies 5 · Jun 3, 2005

Replies: 5

Views: 4K

High School Does anyone know some light facts on the following topic?

Jun 3, 2005 · Replies 2 · Jun 3, 2005

Replies: 2

Views: 2K

Graduate Einsteins though experiment and e=mc^2

Jun 1, 2005 · Replies 4 · Jun 3, 2005

Replies: 4

Views: 4K

Graduate Humans have true 4D spatial vision

May 28, 2005 · Replies 6 · Jun 2, 2005

Replies: 6

Views: 2K

Undergrad Light Beam Problem: What Will Happen?

May 13, 2005 · Replies 6 · Jun 2, 2005

Replies: 6

Views: 3K

Undergrad Gravitation Queries: Explaining Newton's Meaning

Jun 2, 2005 · Replies 9 · Jun 2, 2005

Replies: 9

Views: 3K

Graduate Why ether proves speed of light?

May 30, 2005 · Replies 5 · Jun 1, 2005

Replies: 5

Views: 4K

Graduate What is the relationship between virtual time and black holes?

May 25, 2005 · Replies 2 · Jun 1, 2005

Replies: 2

Views: 2K

Undergrad Throwing relativity out the window

May 30, 2005 · Replies 5 · Jun 1, 2005

Replies: 5

Views: 3K

Graduate GR vs. SR while accelerating away

May 30, 2005 · Replies 15 · May 31, 2005

Replies: 15

Views: 3K

Graduate General Doubts about Space Time

May 31, 2005 · Replies 4 · May 31, 2005

Replies: 4

Views: 3K

Graduate E=mc^2 no object with rest mass can ever reach the speed of light?

May 17, 2005 · Replies 17 · May 31, 2005

Replies: 17

Views: 3K

Graduate How do we express Maxwell's equations in terms of the field tensor?

May 29, 2005 · Replies 6 · May 31, 2005

Replies: 6

Views: 19K

Graduate Calculating Curvature of Space-Time for a Body of Mass

May 27, 2005 · Replies 4 · May 30, 2005

Replies: 4

Views: 2K

Graduate GR & The Cosmological Constant

May 29, 2005 · Replies 4 · May 30, 2005

Replies: 4

Views: 3K

Graduate Confusion between horizon, particle horizon and event horizon

May 26, 2005 · Replies 8 · May 29, 2005

Replies: 8

Views: 5K

Undergrad Kinetic Energy Change in Particle: Earth vs Space Observation

May 27, 2005 · Replies 2 · May 29, 2005

Replies: 2

Views: 2K

Graduate Length Contraction in Special Relativity

May 24, 2005 · Replies 8 · May 27, 2005

Replies: 8

Views: 3K

Graduate Can a rotating rod exceed the speed of light?

May 27, 2005 · Replies 2 · May 27, 2005

Replies: 2

Views: 2K

Undergrad Understanding Radar Guns and Speed Measurement with STR

May 26, 2005 · Replies 8 · May 26, 2005

Replies: 8

Views: 4K

Graduate Is a free ballistic path a parabola or a cycloid?

May 24, 2005 · Replies 28 · May 26, 2005

Replies: 28

Views: 8K

Graduate Help Needed for Schwarzschild Solution Model - Romeo

May 10, 2005 · Replies 6 · May 26, 2005

Replies: 6

Views: 2K

High School What is Einstein's Twin Paradox and how does it illustrate time dilation?

May 19, 2005 · Replies 2 · May 26, 2005

Replies: 2

Views: 3K

Graduate Interesting Question About Relativity and the Absolute

May 25, 2005 · Replies 5 · May 26, 2005

Replies: 5

Views: 2K

Graduate Creating Stable Wormholes: Is It Possible?

May 11, 2005 · Replies 10 · May 24, 2005

Replies: 10

Views: 3K

Graduate Tramplines and Scales and Free Float

May 23, 2005 · Replies 5 · May 24, 2005

Replies: 5

Views: 3K

Graduate What Is Your Perspective on the Event Horizon?

May 17, 2005 · Replies 2 · May 24, 2005

Replies: 2

Views: 4K

Graduate Moving Through the 4th Dimension - Feasible?

Oct 26, 2004 · Replies 37 · May 24, 2005

2

Replies: 37

Views: 7K

Undergrad What is the difference between energy and relativistic mass?

May 9, 2005 · Replies 32 · May 23, 2005

2

Replies: 32

Views: 5K

Undergrad Question regarding the expanding universe

May 19, 2005 · Replies 5 · May 21, 2005

Replies: 5

Views: 2K

Graduate The ADM Approach: Understanding the Basics of Minkowski Space and Metric Tensors

May 18, 2005 · Replies 12 · May 20, 2005

Replies: 12

Views: 3K

Undergrad Help on Relativity for HSC Student from India

May 16, 2005 · Replies 10 · May 19, 2005

Replies: 10

Views: 3K

Graduate Is time truly finite or does it exist simultaneously in all moments?

May 7, 2005 · Replies 15 · May 19, 2005

Replies: 15

Views: 3K

Undergrad Einstein's Derivation of E=mC2: English Translation

May 17, 2005 · Replies 4 · May 19, 2005

Replies: 4

Views: 39K

High School Question About Time: What Would Happen?

May 17, 2005 · Replies 8 · May 18, 2005

Replies: 8

Views: 2K

Graduate Speeding into a supersize black hole

May 18, 2005 · Replies 2 · May 18, 2005

Replies: 2

Views: 2K

Graduate Can we travel into the past with space time physics?

May 15, 2005 · Replies 15 · May 18, 2005

Replies: 15

Views: 3K

Graduate Particles approching the speed of light

May 16, 2005 · Replies 17 · May 18, 2005

Replies: 17

Views: 21K

Where can I find PDF Black holes White Dwars and Neutron Stars

May 10, 2005 · Replies 2 · May 17, 2005

Replies: 2

Views: 4K

Undergrad Time Dilation: Explaining Light Speed Travelers

May 10, 2005 · Replies 19 · May 16, 2005

Replies: 19

Views: 8K

Graduate General Coordinate Transformations

May 16, 2005 · Replies 2 · May 16, 2005

Replies: 2

Views: 5K

Graduate Age Relative? Time, Speed and Paradox Explored

Oct 22, 2004 · Replies 130 · May 14, 2005

5

Replies: 130

Views: 20K

Undergrad Spinning wheel and light speed

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

Replies: 12

Views: 10K

Graduate What is the causal structure of a black hole collapse?

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

Replies: 14

Views: 5K

High School Can a Pocket Watch Keep Ticking at Light Speed?

May 11, 2005 · Replies 5 · May 12, 2005

Replies: 5

Views: 3K

Undergrad What programs are most successfull for visualization physical processess?

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

Replies: 3

Views: 2K

Graduate Curvatures in spacetime explained by momentum?

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

Replies: 11

Views: 3K

Graduate Does Relativity Affect Energy Conservation in Gravity-Driven Systems?

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

Replies: 7

Views: 2K

Undergrad Time dilation and radioactive decay

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

Replies: 4

Views: 5K

Graduate Why time traveling (To the past) is impossible.

May 9, 2005 · Replies 5 · May 11, 2005

Replies: 5

Views: 6K

Graduate Relativistic velocity in the time dimension

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

Replies: 17

Views: 4K

Undergrad What if gravity worked differently?

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

2

Replies: 36

Views: 7K

Graduate Gravity & Light: Does Gravitational Field Slow Down?

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

Replies: 3

Views: 3K

Undergrad Is Time the Only 4th Dimension in Relativity?

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

Replies: 7

Views: 3K

Graduate Perception and Proximity near a Black Hole: A Curious Exploration

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

Replies: 4

Views: 2K

Graduate On photons in perpendicular directions

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

Replies: 3

Views: 3K

Graduate Do White Holes Create Lumps in Spacetime?

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

Replies: 15

Views: 4K

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

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

2

Replies: 30

Views: 4K

Undergrad Relativistic Electrons: Kinetic Energy & 20keV Threshold

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

Replies: 20

Views: 15K

Graduate Does increased velocity increase gravity?

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

Replies: 10

Views: 17K

Graduate Gravity and the scale of matter.

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

Replies: 14

Views: 3K

Graduate Questions on Relativity, Mirror World, Virtual Particles & Physics

May 7, 2005 · Replies 12 · May 8, 2005

Replies: 12

Views: 3K

Graduate Derivation of Christoffel symbol

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

Replies: 10

Views: 9K

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

May 6, 2005 · Replies 7 · May 7, 2005

Replies: 7

Views: 2K

Graduate Curving space - it is the Higgs?

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

Replies: 2

Views: 2K

Graduate Question about Proper Time and Rest Frame selection.

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

Replies: 11

Views: 5K

Undergrad Light always wants to travel in a straight line

May 5, 2005 · Replies 8 · May 6, 2005

Replies: 8

Views: 2K

Graduate Gravitational Field & Mass Interaction: Analogy of Space Curvature

May 5, 2005 · Replies 9 · May 6, 2005

Replies: 9

Views: 2K

Graduate Mass Transference: Can Light be Converted to Matter?

May 5, 2005 · Replies 6 · May 6, 2005

Replies: 6

Views: 2K

Graduate Gravity is really curves in space time

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

Replies: 14

Views: 3K

Can Time Travel into the Past Ever Be Possible?

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

2

Replies: 44

Views: 7K

Graduate Is space dependent on the presence of matter?

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

Replies: 11

Views: 4K

Graduate Finding the contraction formula using proper time

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

Replies: 16

Views: 4K

Graduate Photon Energy when Doppler Shifted

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

2

Replies: 35

Views: 12K

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

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

Replies: 28

Views: 9K

Graduate General Relativity and Theory of Spinors

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

Replies: 14

Views: 5K

Graduate Does an Electron Affect Space-Time? Quantum Uncertainty Explored

Mar 18, 2005 · Replies 6 · Apr 30, 2005

Replies: 6

Views: 4K

Undergrad Length contraction and time dilation

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

Replies: 7

Views: 4K

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

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

2

Replies: 33

Views: 7K

Graduate Information needed on two wheels and chain apparent paradox in SR

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

Replies: 14

Views: 2K

Graduate What Caused the Big Bang and Is the Universe Infinite?

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

Replies: 6

Views: 3K

Graduate Closed Orbit Light Rays in Schwarzschild Metric - Help Needed

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

Replies: 2

Views: 3K

Graduate Confused with General Relativities explanation of Gravity

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

Replies: 6

Views: 2K

Graduate The energy-momentum tensor and the equivalence principle

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

Replies: 23

Views: 5K

Graduate 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

Graduate Temperature and observer velocity

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

Replies: 8

Views: 2K

Graduate Equivalence without relativity

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

Replies: 12

Views: 2K

Graduate What is Space? A Theory Exploration

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

2

Replies: 54

Views: 7K

Graduate Are SR & GR Considered Experimentally Proven?

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

Replies: 16

Views: 4K

Graduate General relativity mathematics : physically acceptable ?

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

Replies: 16

Views: 4K

Graduate Age of the universe - absolute or relative?

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

Replies: 6

Views: 7K

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

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

Replies: 27

Views: 7K

Graduate What is the Time Dilation Relationship Near a Black Hole's Event Horizon?

Apr 24, 2005 · Replies 2 · Apr 25, 2005

Replies: 2

Views: 4K

Graduate Does the equivalence principle hold for charged particles?

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

2

Replies: 30

Views: 8K

Undergrad Time Dilation: Gravity's Effect on Time

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

Replies: 5

Views: 3K

Graduate Can a New Gravity Theory Rival Einstein's Predictions?

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

Replies: 7

Views: 3K

Graduate So confused: Tensors and reletivistic cosmology

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

Replies: 7

Views: 2K

Graduate Does Time Expand? Universe Expansion Explained

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

2

Replies: 34

Views: 16K

Graduate Can a Centrifuge Experiment Demonstrate Reciprocity in Special Relativity?

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

Replies: 14

Views: 7K

Graduate Components and basis transform differently

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

Replies: 4

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.

Top