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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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Graduate Could a GR expert look at this?

Jan 14, 2005 · Replies 11 · Jan 17, 2005

Replies: 11

Views: 4K

Graduate Is FTL Travel Within a Light Cone Possible for Time Travel?

Jan 10, 2005 · Replies 2 · Jan 17, 2005

Replies: 2

Views: 3K

Graduate Help Solve a Mystery: Lawden's "An Introduction to Tensor Calculus

Jan 14, 2005 · Replies 2 · Jan 16, 2005

Replies: 2

Views: 2K

Undergrad Can someone explain Einstein's relativity theory?

Jan 11, 2005 · Replies 69 · Jan 15, 2005

3

Replies: 69

Views: 18K

Graduate A question of universal expandsion

Dec 22, 2004 · Replies 29 · Jan 14, 2005

Replies: 29

Views: 4K

Graduate Find Distance on a 2-Sphere Using Metric Tensor

Jan 13, 2005 · Replies 2 · Jan 14, 2005

Replies: 2

Views: 3K

Graduate Can Objects Really Travel Through Forbidden Space Between Black and White Holes?

Jan 12, 2005 · Replies 3 · Jan 13, 2005

Replies: 3

Views: 2K

Undergrad Electric Charge Oscillation & Light Waves

Jan 12, 2005 · Replies 13 · Jan 13, 2005

Replies: 13

Views: 3K

Graduate Graviton and the equivalence principle

Jan 10, 2005 · Replies 7 · Jan 12, 2005

Replies: 7

Views: 3K

Graduate Discovered a way to make MOND fully relativistic

Jan 9, 2005 · Replies 4 · Jan 11, 2005

Replies: 4

Views: 3K

Graduate Spacetime wave orbits black hole

Jan 11, 2005 · Replies 2 · Jan 11, 2005

Replies: 2

Views: 3K

Graduate Special Relativity vs Alternatives

Jan 8, 2005 · Replies 19 · Jan 11, 2005

Replies: 19

Views: 4K

Graduate Relative positions in time - How does SRT define them.

Jan 8, 2005 · Replies 11 · Jan 10, 2005

Replies: 11

Views: 3K

Relativity & Quran: Is Bible Wrong?

Jan 3, 2005 · Replies 2 · Jan 10, 2005

Replies: 2

Views: 5K

Graduate How do you calculate time dilation in a gravitational field

Jan 1, 2005 · Replies 19 · Jan 9, 2005

Replies: 19

Views: 19K

Undergrad The Twin Paradox: Understanding Time Dilation in Space Travel

Dec 7, 2004 · Replies 114 · Jan 8, 2005

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Replies: 114

Views: 13K

Graduate Note the comment on SR herein:

Jan 8, 2005 · Replies 2 · Jan 8, 2005

Replies: 2

Views: 3K

Undergrad Einstein's Derivation of e=mc^2: Urgent Help Needed

Jan 4, 2005 · Replies 5 · Jan 8, 2005

Replies: 5

Views: 3K

Graduate Testing the Postulate of Special Relativity

Jan 6, 2005 · Replies 12 · Jan 7, 2005

Replies: 12

Views: 3K

Undergrad Explaining Special Relativity: Increasing Resistance to Acceleration

Jan 4, 2005 · Replies 6 · Jan 7, 2005

Replies: 6

Views: 2K

Graduate Bob's Spaceship: Length Contradiction & Time Difference

Jan 5, 2005 · Replies 10 · Jan 7, 2005

Replies: 10

Views: 3K

Undergrad Can anyone explain the Twin Paradox in special relativity?

Jan 6, 2005 · Replies 4 · Jan 7, 2005

Replies: 4

Views: 2K

Graduate Ph. D. in Mathematics or Physics (Relativity)

Dec 30, 2004 · Replies 2 · Jan 7, 2005

Replies: 2

Views: 3K

Graduate How Does Relativity Affect Information Exchange Between Moving Observers?

Dec 30, 2004 · Replies 2 · Jan 6, 2005

Replies: 2

Views: 2K

Graduate Light Geodesic Path: Troubleshooting Post Deletion

Jan 4, 2005 · Replies 8 · Jan 6, 2005

Replies: 8

Views: 4K

Graduate Why Does a Chain Snap Between Train Cars at High Speeds in Relativity?

Jan 4, 2005 · Replies 6 · Jan 4, 2005

Replies: 6

Views: 3K

Graduate Geometric field / Thirring Lense / Red shift

Jan 3, 2005 · Replies 3 · Jan 4, 2005

Replies: 3

Views: 3K

Graduate Understanding Gravity: The Curvature of Space-Time and Kinetic Energy

Jan 4, 2005 · Replies 3 · Jan 4, 2005

Replies: 3

Views: 3K

Graduate What if the guy on the train throws the ball backwards (u'=-.99c)?

Dec 23, 2004 · Replies 2 · Jan 3, 2005

Replies: 2

Views: 3K

Graduate Is the Missing Mass in Nuclei Equal to Nuclear Potential Energy?

Jan 1, 2005 · Replies 19 · Jan 3, 2005

Replies: 19

Views: 4K

Graduate Question on feasibility of relativistic travel

Jan 1, 2005 · Replies 7 · Jan 2, 2005

Replies: 7

Views: 6K

Undergrad Solving Escape Velocity of the Sun: Troubleshooting an Error

Jan 2, 2005 · Replies 5 · Jan 2, 2005

Replies: 5

Views: 3K

Graduate GR & Higgs Field: Linked by Mass?

Dec 26, 2004 · Replies 5 · Jan 2, 2005

Replies: 5

Views: 4K

Graduate A interesting problem in relativity

Dec 30, 2004 · Replies 4 · Dec 31, 2004

Replies: 4

Views: 3K

Graduate Is the Speed of Gravity Equal to the Speed of Light?

Dec 11, 2004 · Replies 66 · Dec 30, 2004

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Replies: 66

Views: 13K

Graduate When is the radiation from an accelerated charge a matter of controversy?

Dec 25, 2004 · Replies 55 · Dec 29, 2004

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Replies: 55

Views: 15K

Graduate Can Photons Have Reference Frames in Special Relativity?

Dec 26, 2004 · Replies 9 · Dec 29, 2004

Replies: 9

Views: 3K

Undergrad Relative Velocity of a Car on a Moving Truck

Dec 28, 2004 · Replies 2 · Dec 28, 2004

Replies: 2

Views: 2K

Graduate Proving relativistic blueshift with Lorentz transforms only

Dec 27, 2004 · Replies 7 · Dec 27, 2004

Replies: 7

Views: 4K

Graduate Mathematically rigorous definition of time ?

Dec 23, 2004 · Replies 16 · Dec 27, 2004

Replies: 16

Views: 3K

Undergrad What is the Proper Length of a Ruler in Motion?

Sep 1, 2004 · Replies 13 · Dec 27, 2004

Replies: 13

Views: 7K

Graduate Riemann curvature tensor derivation

Dec 23, 2004 · Replies 4 · Dec 27, 2004

Replies: 4

Views: 12K

Graduate What is the problem with GR and quantum

Dec 22, 2004 · Replies 7 · Dec 26, 2004

Replies: 7

Views: 3K

Graduate If you travel faster than the speed of light, do you open up a black hole?

Dec 24, 2004 · Replies 9 · Dec 26, 2004

Replies: 9

Views: 4K

Graduate Why arent Plancks constant's relative?

Dec 14, 2004 · Replies 15 · Dec 26, 2004

Replies: 15

Views: 5K

Graduate Rotating Coordinate Systems: Are Geocentric and Heliocentric Views Equivalent?

Dec 25, 2004 · Replies 3 · Dec 25, 2004

Replies: 3

Views: 4K

Graduate Just how far away is that star?

Dec 21, 2004 · Replies 15 · Dec 25, 2004

Replies: 15

Views: 5K

Undergrad What is the Gravity Equation for Understanding Mass and Black Holes?

Dec 24, 2004 · Replies 3 · Dec 25, 2004

Replies: 3

Views: 3K

Graduate Where to Find Theodor Kaluza's Paper Sent to Albert Einstein?

Dec 17, 2004 · Replies 2 · Dec 24, 2004

Replies: 2

Views: 5K

Graduate Is it Possible to Resolve the SR Time Dilation Problem? Help Needed!

Dec 23, 2004 · Replies 4 · Dec 24, 2004

Replies: 4

Views: 3K

Graduate Does Mass Change with Energy Exchange in Orbiting Bodies?

Dec 21, 2004 · Replies 22 · Dec 23, 2004

Replies: 22

Views: 4K

Graduate Teaching vs Doing: The Role of Concepts in Research - Insights from Physics

Dec 17, 2004 · Replies 41 · Dec 23, 2004

2

Replies: 41

Views: 5K

Graduate Infinite Time and Hawking Radiation

Dec 17, 2004 · Replies 12 · Dec 22, 2004

Replies: 12

Views: 3K

Graduate Exploring Gravity's Peculiar Features: T Padmanabhan's Latest Paper

Dec 15, 2004 · Replies 2 · Dec 22, 2004

Replies: 2

Views: 4K

Graduate Mass Gain in Supernovae & Black Holes: Explaining Unaccounted Mass

Dec 11, 2004 · Replies 6 · Dec 20, 2004

Replies: 6

Views: 2K

Graduate Q theory, Relativistic Mass and Einstein

Dec 18, 2004 · Replies 15 · Dec 20, 2004

Replies: 15

Views: 4K

Gravitation from the Ground Up - B.F. Schutz

Dec 15, 2004 · Replies 6 · Dec 19, 2004

Replies: 6

Views: 4K

Graduate Is universal time the 4th or 5th Dimension?

Dec 17, 2004 · Replies 3 · Dec 18, 2004

Replies: 3

Views: 9K

Graduate Is Gravity an Attractive Force?

Dec 18, 2004 · Replies 10 · Dec 18, 2004

Replies: 10

Views: 5K

Graduate Seeking a Resolution to the Bug-Rivet Paradox

Dec 17, 2004 · Replies 4 · Dec 18, 2004

Replies: 4

Views: 15K

Graduate Scientific alternative to the anthropic principle

Dec 16, 2004 · Replies 7 · Dec 16, 2004

Replies: 7

Views: 3K

Graduate Beyond c if time goes positive does V decrease?

Dec 14, 2004 · Replies 8 · Dec 16, 2004

Replies: 8

Views: 4K

Graduate Why do photons naturally travel at c?

Nov 26, 2004 · Replies 36 · Dec 16, 2004

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Replies: 36

Views: 6K

Graduate Mass of Photon: Consequences & Experiments - L.C. Tu et al (2004)

Nov 23, 2004 · Replies 78 · Dec 16, 2004

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Replies: 78

Views: 11K

Graduate Is the universe's potential energy related to the mass inside a shell of matter?

Dec 14, 2004 · Replies 6 · Dec 15, 2004

Replies: 6

Views: 2K

Graduate Laws of physics in four-vector form. A question.

Dec 14, 2004 · Replies 2 · Dec 14, 2004

Replies: 2

Views: 3K

Graduate How objects look at high speeds

Dec 13, 2004 · Replies 2 · Dec 13, 2004

Replies: 2

Views: 2K

Graduate Many Worlds Interpretation of SR

Dec 13, 2004 · Replies 4 · Dec 13, 2004

Replies: 4

Views: 4K

Graduate Einstein´s work ion Unified Field Theory

Dec 12, 2004 · Replies 4 · Dec 13, 2004

Replies: 4

Views: 3K

Graduate Paradoxes that have come up for special relativity

Nov 8, 2004 · Replies 39 · Dec 13, 2004

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Replies: 39

Views: 8K

Graduate Technical paper on Lense-Thirring Lageos measurement

Dec 12, 2004 · Replies 4 · Dec 13, 2004

Replies: 4

Views: 3K

Graduate GR Metric Meaning: Unpacking Confusion

Nov 29, 2004 · Replies 41 · Dec 11, 2004

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Replies: 41

Views: 9K

Graduate Does a single photon have 'color'

Dec 7, 2004 · Replies 13 · Dec 10, 2004

Replies: 13

Views: 18K

Graduate Deriving the Special Relativity Formula: A Scientific Approach

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

Replies: 6

Views: 2K

Graduate Shining a Torch at the Moon: Does Light Travel Faster than c?

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

Replies: 6

Views: 3K

Graduate Testing SR with a Rotating Mass: Experiments & Theory

Dec 9, 2004 · Replies 4 · Dec 10, 2004

Replies: 4

Views: 2K

Graduate Is Time Dilation Just a Virtual Effect in Relativity?

Dec 10, 2004 · Replies 2 · Dec 10, 2004

Replies: 2

Views: 2K

Undergrad What is the direction of space curvature around a mass in 3D space?

Dec 8, 2004 · Replies 9 · Dec 9, 2004

Replies: 9

Views: 4K

Undergrad 1st postulate of Special Relativity

Dec 8, 2004 · Replies 4 · Dec 9, 2004

Replies: 4

Views: 3K

Undergrad RTT’s mind boggling Time Dilation Paradox

Nov 28, 2004 · Replies 16 · Dec 9, 2004

Replies: 16

Views: 4K

High School Special Relativity for the School Going Child

Nov 30, 2004 · Replies 15 · Dec 9, 2004

Replies: 15

Views: 4K

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: 6K

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

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

Replies: 10

Views: 4K

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

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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: 2K

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: 4K

Graduate The whole racing with light thingy.

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

Replies: 2

Views: 2K

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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