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

Undergrad Can the equation e=mc2 be derived?

Dec 7, 2004 · Replies 3 · Dec 7, 2004

Replies: 3

Views: 2K

Graduate Learn Relativity: Exercises & Solutions

Dec 5, 2004 · Replies 5 · Dec 6, 2004

Replies: 5

Views: 3K

High School What Are Defined Quantities in Physics Like Momentum, Velocity, and Force?

Dec 6, 2004 · Replies 10 · Dec 6, 2004

Replies: 10

Views: 10K

Graduate Relativity Q: Light Beam Speed Relative to Object & Observer

Dec 5, 2004 · Replies 5 · Dec 6, 2004

Replies: 5

Views: 2K

Undergrad What Are Parallel Universes and Their Connection to Time Travel?

Nov 8, 2004 · Replies 24 · Dec 6, 2004

Replies: 24

Views: 7K

Graduate What are the implications of GR that are not captured by gravitomagnetism?

Dec 1, 2004 · Replies 10 · Dec 5, 2004

Replies: 10

Views: 5K

Graduate Space curvature allows time travel to the past

Nov 26, 2004 · Replies 4 · Dec 5, 2004

Replies: 4

Views: 4K

Graduate Centrifugal force from GR perspective

Nov 15, 2004 · Replies 32 · Dec 5, 2004

2

Replies: 32

Views: 6K

Undergrad Why do we consider time as the 4th dimension?

Dec 3, 2004 · Replies 7 · Dec 4, 2004

Replies: 7

Views: 7K

Graduate Arrow of time and why it flows in only one direction

Nov 19, 2004 · Replies 2 · Dec 3, 2004

Replies: 2

Views: 3K

Graduate Why Can't Information Travel Faster Than Light Without Breaking Causality?

Dec 1, 2004 · Replies 3 · Dec 1, 2004

Replies: 3

Views: 3K

Graduate Understanding Potential and Potential Energy in Relativistic Electrodynamics

Nov 23, 2004 · Replies 5 · Dec 1, 2004

Replies: 5

Views: 2K

Graduate How Does Our Understanding of Black Holes Challenge the Age of the Universe?

Dec 1, 2004 · Replies 3 · Dec 1, 2004

Replies: 3

Views: 2K

High School Do Black Holes Have Dimension?

Nov 23, 2004 · Replies 2 · Nov 30, 2004

Replies: 2

Views: 2K

Graduate Special and General relativity

Nov 29, 2004 · Replies 5 · Nov 29, 2004

Replies: 5

Views: 4K

High School Is the Speed of Light Affected by Atmospheric Conditions?

Nov 27, 2004 · Replies 3 · Nov 28, 2004

Replies: 3

Views: 2K

What are your favorite web pages on SR?

Nov 27, 2004 · Replies 2 · Nov 27, 2004

Replies: 2

Views: 2K

Graduate Black holes and Hawking radiation

Nov 15, 2004 · Replies 14 · Nov 26, 2004

Replies: 14

Views: 5K

Graduate The whole racing with light thingy.

Nov 25, 2004 · Replies 2 · Nov 26, 2004

Replies: 2

Views: 2K

Graduate Can Exceeding the Speed of Light Reverse Time?

Nov 23, 2004 · Replies 2 · Nov 26, 2004

Replies: 2

Views: 3K

Graduate Where Can I Find the Ricci Tensor/Scalar for a Circularly Symmetric Spacetime?

Nov 24, 2004 · Replies 2 · Nov 24, 2004

Replies: 2

Views: 2K

Graduate Communication with a Million-Mile Pole: A Relativity Puzzle?

Nov 24, 2004 · Replies 2 · Nov 24, 2004

Replies: 2

Views: 2K

Undergrad Relativity Notes: Understanding Scalars & Vectors

Nov 17, 2004 · Replies 2 · Nov 24, 2004

Replies: 2

Views: 2K

Undergrad Special relativity and Universe expansion.

Nov 23, 2004 · Replies 3 · Nov 24, 2004

Replies: 3

Views: 5K

Graduate Clock Synchronization: How to Measure Photon Velocity

Nov 19, 2004 · Replies 7 · Nov 23, 2004

Replies: 7

Views: 4K

Graduate Terrestrial phenomena significantly influenced by GR?

Nov 19, 2004 · Replies 5 · Nov 22, 2004

Replies: 5

Views: 2K

Graduate Reconciling Assumptions: Understanding the Concept of the Age of the Universe

Nov 22, 2004 · Replies 2 · Nov 22, 2004

Replies: 2

Views: 3K

Graduate Names of 4-Vector Norms & Physical Quantities

Nov 22, 2004 · Replies 2 · Nov 22, 2004

Replies: 2

Views: 4K

Undergrad What's wrong with my calculation?

Nov 22, 2004 · Replies 3 · Nov 22, 2004

Replies: 3

Views: 3K

Graduate Far Gravitational field of a moving mass

Nov 9, 2004 · Replies 13 · Nov 22, 2004

Replies: 13

Views: 4K

Graduate Is the Speed of Light Really Constant?

Nov 21, 2004 · Replies 3 · Nov 21, 2004

Replies: 3

Views: 3K

Graduate Understanding Interferometers: Principle, Methodology, and Applications

Nov 18, 2004 · Replies 4 · Nov 19, 2004

Replies: 4

Views: 4K

Graduate Embarassingly simple question - Christoffel symbols

Nov 18, 2004 · Replies 6 · Nov 19, 2004

Replies: 6

Views: 3K

Graduate Relativity and Clocks on Airplanes Calibrated from the Ground

Nov 5, 2004 · Replies 8 · Nov 18, 2004

Replies: 8

Views: 3K

Graduate Einstein energy and thermodynamic energy

Oct 18, 2004 · Replies 16 · Nov 16, 2004

Replies: 16

Views: 4K

Graduate The Minkowski so-called 'metric'

Nov 12, 2004 · Replies 5 · Nov 16, 2004

Replies: 5

Views: 3K

Graduate Outer product of two one forms.

Nov 13, 2004 · Replies 3 · Nov 16, 2004

Replies: 3

Views: 5K

Graduate What causes a single photon to propagate in an infinite spacetime?

Nov 13, 2004 · Replies 2 · Nov 15, 2004

Replies: 2

Views: 2K

Graduate Mahematics for general relativiy?

Nov 8, 2004 · Replies 2 · Nov 15, 2004

Replies: 2

Views: 2K

Graduate Can Inertia and Acceleration in Space Be Explained by General Relativity?

Nov 13, 2004 · Replies 2 · Nov 15, 2004

Replies: 2

Views: 2K

Graduate Can Gravity Be Cancelled? Theories and Research on the Effects of Gravity

Jun 30, 2003 · Replies 11 · Nov 10, 2004

Replies: 11

Views: 9K

Graduate Proving the Existence of Event Horizon in Homogeneous Spacetimes

Nov 9, 2004 · Replies 2 · Nov 10, 2004

Replies: 2

Views: 4K

Graduate Yet another spaceship moving at .9c thread

Oct 24, 2004 · Replies 11 · Nov 10, 2004

Replies: 11

Views: 5K

Undergrad Design features in a spacecraft

Nov 8, 2004 · Replies 7 · Nov 10, 2004

Replies: 7

Views: 3K

Graduate .Solving the Time Travel Paradox: An Explanation

Nov 3, 2004 · Replies 9 · Nov 9, 2004

Replies: 9

Views: 2K

Graduate Static Spacetimes: Killing Vectors Explained

Nov 8, 2004 · Replies 12 · Nov 9, 2004

Replies: 12

Views: 4K

Graduate What Is an Electric Field 4-Vector?

Oct 28, 2004 · Replies 3 · Nov 8, 2004

Replies: 3

Views: 5K

Graduate Did Einstein Think Reality Requires an Observer?

Oct 27, 2004 · Replies 3 · Nov 8, 2004

Replies: 3

Views: 3K

Graduate Relativity Qs: Can Anyone Help?

Nov 5, 2004 · Replies 20 · Nov 8, 2004

Replies: 20

Views: 4K

Graduate Does length contraction apply to all objects, big and small?

Nov 5, 2004 · Replies 3 · Nov 6, 2004

Replies: 3

Views: 4K

Graduate 'Speed of Light' Thought Experiment

Oct 26, 2004 · Replies 32 · Nov 5, 2004

2

Replies: 32

Views: 8K

Graduate Contraction effects at relativistic velocities

Sep 22, 2004 · Replies 63 · Nov 4, 2004

3

Replies: 63

Views: 11K

Graduate Spacetime Curvature: What Does it Mean?

Nov 3, 2004 · Replies 2 · Nov 4, 2004

Replies: 2

Views: 3K

Undergrad Quest for Gravity Theory: Earth's Rotation Impact?

Nov 2, 2004 · Replies 5 · Nov 3, 2004

Replies: 5

Views: 2K

Graduate The Mysterious 8.88 ft-lbs: A Man in Space Story

Oct 28, 2004 · Replies 36 · Nov 3, 2004

2

Replies: 36

Views: 8K

Graduate What is Einstein Temperature and how can i use it in this question?

Oct 26, 2004 · Replies 2 · Nov 2, 2004

Replies: 2

Views: 9K

Graduate Space-time and the speed of light

Oct 31, 2004 · Replies 11 · Nov 2, 2004

Replies: 11

Views: 5K

Undergrad Understanding Lorentz Transformations: A Derivation for A-Level Students

Oct 31, 2004 · Replies 3 · Nov 1, 2004

Replies: 3

Views: 3K

Undergrad Experiments performed that upholds the predictions of SR?

Oct 29, 2004 · Replies 2 · Oct 31, 2004

Replies: 2

Views: 2K

Graduate Calculate Relative Speeds of Moving Objects for Twin Paradox

Oct 31, 2004 · Replies 3 · Oct 31, 2004

Replies: 3

Views: 2K

Graduate Can u change time on a watch by

Oct 28, 2004 · Replies 8 · Oct 30, 2004

Replies: 8

Views: 3K

Graduate Important find:when is the light wave-motion ?and when is particle-motion?

Oct 30, 2004 · Replies 5 · Oct 30, 2004

Replies: 5

Views: 5K

Graduate Why Is the Fourth Component Necessary in Relativistic Momentum?

Oct 21, 2004 · Replies 25 · Oct 30, 2004

Replies: 25

Views: 7K

Graduate Time travel: Scientific Evidence & Theories

Oct 27, 2004 · Replies 12 · Oct 30, 2004

Replies: 12

Views: 4K

Graduate Frame Dragging Detected per GR

Oct 20, 2004 · Replies 2 · Oct 29, 2004

Replies: 2

Views: 2K

Undergrad Relativistic Velocity: Speed Limits & Ranges Explained

Oct 26, 2004 · Replies 5 · Oct 28, 2004

Replies: 5

Views: 12K

Undergrad Why is there 0 gravity in space

Sep 21, 2004 · Replies 24 · Oct 28, 2004

Replies: 24

Views: 8K

Graduate Einstein's GR vs. Aether Theory: Examining the Debate

Sep 14, 2004 · Replies 16 · Oct 28, 2004

Replies: 16

Views: 4K

Graduate Is the Speed of Light the Ultimate Conversion Point for Energy?

Apr 2, 2003 · Replies 4 · Oct 27, 2004

Replies: 4

Views: 9K

Graduate Time Dilation Question: A vs. B Clocks in Motion Experiment

Aug 2, 2004 · Replies 51 · Oct 27, 2004

2

Replies: 51

Views: 9K

Graduate How Is Total Mass Calculated in General Relativity for a Finite Body?

Oct 7, 2004 · Replies 41 · Oct 26, 2004

2

Replies: 41

Views: 8K

High School Gravitational control- where it doesnt exist

Oct 24, 2004 · Replies 4 · Oct 25, 2004

Replies: 4

Views: 2K

Graduate Does an electric charge curve spacetime ?

Sep 21, 2004 · Replies 119 · Oct 25, 2004

4

Replies: 119

Views: 22K

Graduate Light, Mass, and Black hole question

Oct 16, 2004 · Replies 11 · Oct 25, 2004

Replies: 11

Views: 5K

Graduate Information Twin , loss Paradox?

Oct 24, 2004 · Replies 2 · Oct 25, 2004

Replies: 2

Views: 3K

Graduate What are the implications of time being a fourth dimension?

Oct 17, 2004 · Replies 19 · Oct 24, 2004

Replies: 19

Views: 9K

Graduate What is the Origin of Frame Dragging and Gravity Waves in GR?

Oct 22, 2004 · Replies 4 · Oct 24, 2004

Replies: 4

Views: 3K

Undergrad E=MC2 energy must contribute to the force of gravity

Oct 22, 2004 · Replies 1 · Oct 22, 2004

Replies: 1

Views: 2K

Graduate Time Dilation and Length Contraction

Oct 21, 2004 · Replies 8 · Oct 22, 2004

Replies: 8

Views: 5K

Graduate Could someone me get my mind around this paradox

Oct 19, 2004 · Replies 3 · Oct 21, 2004

Replies: 3

Views: 3K

Graduate Gravity and massless particles?

Oct 16, 2004 · Replies 5 · Oct 21, 2004

Replies: 5

Views: 3K

Graduate Can electromagnetic fields produce space-time curvature?

Oct 15, 2004 · Replies 6 · Oct 21, 2004

Replies: 6

Views: 5K

Graduate How Do GPS Satellites Adjust for Both Special and General Relativity Effects?

Oct 18, 2004 · Replies 4 · Oct 20, 2004

Replies: 4

Views: 4K

Undergrad Mass vs. Gravity and what our teachers have told us

Oct 12, 2004 · Replies 25 · Oct 20, 2004

Replies: 25

Views: 15K

Undergrad Einstein's Equation: Energy Changes & Mass - What Happens?

Oct 19, 2004 · Replies 4 · Oct 20, 2004

Replies: 4

Views: 2K

Undergrad Understanding Relative Motion in Physics: Debunking the Misconceptions

Oct 13, 2004 · Replies 2 · Oct 20, 2004

Replies: 2

Views: 2K

Undergrad Why isn't freefall based on the mass of the object falling?

Oct 12, 2004 · Replies 23 · Oct 19, 2004

Replies: 23

Views: 16K

Graduate Do All Observers Agree on the Timing of Events in Relativity Experiments?

Oct 16, 2004 · Replies 25 · Oct 19, 2004

Replies: 25

Views: 6K

Graduate Dark Matter: A Result of Relativity?

Aug 12, 2004 · Replies 26 · Oct 18, 2004

Replies: 26

Views: 6K

Graduate Is the Schwarzchild Metric Accurate in Predicting Black Holes?

Oct 18, 2004 · Replies 4 · Oct 18, 2004

Replies: 4

Views: 3K

High School E=MC2: Explaining What It Implies

Oct 16, 2004 · Replies 10 · Oct 17, 2004

Replies: 10

Views: 5K

Undergrad Is Time Travel Possible with Differential Spatial Motion?

Oct 12, 2004 · Replies 17 · Oct 17, 2004

Replies: 17

Views: 3K

Undergrad Foundation to the theory of relativity

Oct 15, 2004 · Replies 9 · Oct 16, 2004

Replies: 9

Views: 3K

Undergrad Are Time Dilation and Length Contraction Proven by Experiments?

Oct 16, 2004 · Replies 3 · Oct 16, 2004

Replies: 3

Views: 5K

Graduate Does Gravity Pass Through Barriers?

Oct 14, 2004 · Replies 6 · Oct 16, 2004

Replies: 6

Views: 2K

High School What Causes Gravity to Attract Objects?

Oct 12, 2004 · Replies 4 · Oct 16, 2004

Replies: 4

Views: 2K

Graduate What Happens to the Twins in the Twin Paradox with Acceleration?

Oct 16, 2004 · Replies 2 · Oct 16, 2004

Replies: 2

Views: 2K

Graduate Distance Between Two Bodies: Am I Correct?

Oct 13, 2004 · Replies 9 · Oct 15, 2004

Replies: 9

Views: 6K

Relativity: The Special and General Theory, signed

Oct 14, 2004 · Replies 4 · Oct 14, 2004

Replies: 4

Views: 2K

Graduate Is Energy Conserved in General Relativity?

Jun 9, 2004 · Replies 120 · Oct 14, 2004

5

Replies: 120

Views: 17K

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