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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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High School What in the world does E =mc2 mean?

Jul 15, 2005 · Replies 32 · Aug 4, 2005

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Replies: 32

Views: 5K

Graduate Do Massless Particles Like Gravitons Interact With the Higgs Field?

Aug 2, 2005 · Replies 26 · Aug 4, 2005

Replies: 26

Views: 5K

Graduate Energy in a volume changing the geometry

Jul 29, 2005 · Replies 28 · Aug 4, 2005

Replies: 28

Views: 4K

High School Twin Born On Earth and in Space - Age Difference

Aug 2, 2005 · Replies 8 · Aug 4, 2005

Replies: 8

Views: 2K

Graduate Theory of General Relativity: Reason for Heavenly Bodies Creating Spacetime Dent

Aug 3, 2005 · Replies 4 · Aug 3, 2005

Replies: 4

Views: 2K

Graduate Gravity Probe B: Gyroscope Orientation and Precession

Aug 2, 2005 · Replies 2 · Aug 3, 2005

Replies: 2

Views: 2K

Graduate Understanding Relativistic Kinetic Energy in Lab Experiments

Jul 27, 2005 · Replies 2 · Aug 3, 2005

Replies: 2

Views: 3K

Graduate Twin paradox, live via satellite

Jul 31, 2005 · Replies 10 · Aug 2, 2005

Replies: 10

Views: 3K

Graduate Questioning Relative Mass Magnification by a Moving Observer

Jul 26, 2005 · Replies 2 · Aug 2, 2005

Replies: 2

Views: 2K

Graduate Blackhole decay and gravitational wave

Aug 1, 2005 · Replies 7 · Aug 2, 2005

Replies: 7

Views: 2K

Undergrad Is the Big Bang Theory Misunderstood in Terms of Expansion and Gravity?

Jul 9, 2005 · Replies 9 · Aug 1, 2005

Replies: 9

Views: 4K

Graduate New Paper: GR implies no dark matter

Jul 27, 2005 · Replies 5 · Aug 1, 2005

Replies: 5

Views: 4K

Graduate Is the Twin Paradox Misunderstood in Terms of Aging Differences?

Jul 29, 2005 · Replies 5 · Aug 1, 2005

Replies: 5

Views: 3K

Graduate Angular momentum at near-c velocities

Jul 23, 2005 · Replies 10 · Jul 30, 2005

Replies: 10

Views: 3K

Graduate What are the prerequisites for understanding Lorentz transformations?

Jul 29, 2005 · Replies 4 · Jul 30, 2005

Replies: 4

Views: 4K

Graduate Can particles and geometry coexist in gravitational theory?

Jul 28, 2005 · Replies 3 · Jul 28, 2005

Replies: 3

Views: 2K

Graduate Fermi-Walker transport - problem with a minus sign

Jul 26, 2005 · Replies 3 · Jul 28, 2005

Replies: 3

Views: 3K

Graduate Relativistic Mass: Inertial & Gravitational Effects

Jul 25, 2005 · Replies 16 · Jul 28, 2005

Replies: 16

Views: 6K

Graduate On the Relativity of Lengths and Times

Jul 22, 2005 · Replies 4 · Jul 26, 2005

Replies: 4

Views: 3K

Graduate Prove rectilinear motion given four-acceleration and four-velocity?

Jul 20, 2005 · Replies 6 · Jul 25, 2005

Replies: 6

Views: 3K

Graduate Simultaneity in IB Exam Q: Person A & B's Perspective

Jul 25, 2005 · Replies 3 · Jul 25, 2005

Replies: 3

Views: 3K

Graduate Noether's theorem and Time invariance?

Jul 24, 2005 · Replies 4 · Jul 25, 2005

Replies: 4

Views: 5K

Graduate Special Relativity and Mass Variation

Jul 20, 2005 · Replies 14 · Jul 24, 2005

Replies: 14

Views: 5K

Graduate Is Euclidean Quantum Gravity the Future of Nonperturbative Physics?

Jul 23, 2005 · Replies 2 · Jul 23, 2005

Replies: 2

Views: 4K

Graduate Prove Tidal Distortion Volume Conservation Mathematically

Jul 14, 2005 · Replies 2 · Jul 22, 2005

Replies: 2

Views: 4K

Graduate Time machines and rotating cylinders

Jul 13, 2005 · Replies 2 · Jul 21, 2005

Replies: 2

Views: 3K

Graduate What do we know about gravitation?

Jul 8, 2005 · Replies 14 · Jul 20, 2005

Replies: 14

Views: 3K

Undergrad Why is gravity described as bending space instead of just an attractive force?

Jul 19, 2005 · Replies 9 · Jul 20, 2005

Replies: 9

Views: 8K

Graduate An old new kind of observer dependency: is v > c possible if nobody was looking?

Jul 19, 2005 · Replies 3 · Jul 20, 2005

Replies: 3

Views: 2K

Graduate Accomodating relativity to dark matter

Jul 9, 2005 · Replies 3 · Jul 19, 2005

Replies: 3

Views: 2K

Graduate Question about Wave equation for light in nonflat spaces

Jul 18, 2005 · Replies 5 · Jul 19, 2005

Replies: 5

Views: 3K

Graduate Is Time a Dimension or a Field?

Jul 8, 2005 · Replies 9 · Jul 19, 2005

Replies: 9

Views: 4K

Graduate H and Infinity: What Happens to Time and Distance at the Event Horizon?

May 26, 2005 · Replies 9 · Jul 19, 2005

Replies: 9

Views: 7K

Graduate Why Must the Universe Expand or Contract According to General Relativity?

Jul 18, 2005 · Replies 2 · Jul 18, 2005

Replies: 2

Views: 2K

Graduate General Relativity and EM - Heim Theory

Jul 11, 2005 · Replies 1 · Jul 18, 2005

Replies: 1

Views: 5K

Graduate Einstein's:Mass increase resulting from Acceleration increase

Jun 29, 2005 · Replies 30 · Jul 18, 2005

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Replies: 30

Views: 25K

Graduate Is Rotation in x and y Invariant at the Origin in a Rotating Coordinate System?

Jul 14, 2005 · Replies 6 · Jul 17, 2005

Replies: 6

Views: 3K

Graduate Understanding the Dot Product in Fermi Normal Coordinates

Jul 15, 2005 · Replies 4 · Jul 16, 2005

Replies: 4

Views: 6K

Graduate Gravity doughnut may solve time travel problem

Jul 15, 2005 · Replies 3 · Jul 16, 2005

Replies: 3

Views: 6K

Graduate Fermi-Walker transport non-rotating particle

Jul 4, 2005 · Replies 7 · Jul 14, 2005

Replies: 7

Views: 8K

Graduate Gravitational redshift +blackbody spectrum

Jul 7, 2005 · Replies 2 · Jul 14, 2005

Replies: 2

Views: 5K

Graduate Can spacetime as a rubber sheet be taken literally or merely as pedagogic?

Jul 6, 2005 · Replies 25 · Jul 12, 2005

Replies: 25

Views: 8K

Graduate How Does General Relativity Explain the Motion of Earth and Light?

Jul 5, 2005 · Replies 2 · Jul 12, 2005

Replies: 2

Views: 2K

Undergrad General Relativity in the Undergraduate Physics Curriculum

Jun 14, 2005 · Replies 30 · Jul 12, 2005

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Replies: 30

Views: 6K

Graduate Relativity - facing backwards on a train

Jul 10, 2005 · Replies 9 · Jul 12, 2005

Replies: 9

Views: 4K

Undergrad Why does light accelerates after being slowed down

Jul 7, 2005 · Replies 12 · Jul 12, 2005

Replies: 12

Views: 5K

Graduate Why Do Photons Travel at the Speed of Light?

Jul 12, 2005 · Replies 4 · Jul 12, 2005

Replies: 4

Views: 3K

Graduate C constant to the observer as well?

Jul 4, 2005 · Replies 2 · Jul 11, 2005

Replies: 2

Views: 2K

Graduate General Relativity Postulates and History of Publication

Jul 10, 2005 · Replies 5 · Jul 11, 2005

Replies: 5

Views: 4K

Undergrad Will Pushing One End of a 2 Light Second Rod Move the Other End?

Jul 10, 2005 · Replies 2 · Jul 10, 2005

Replies: 2

Views: 2K

Graduate The effect of wormholes on photons

Jul 2, 2005 · Replies 2 · Jul 9, 2005

Replies: 2

Views: 2K

Graduate Proofing a few paragraphs on relativity

Jul 9, 2005 · Replies 6 · Jul 9, 2005

Replies: 6

Views: 2K

Graduate Light in a Black Hole: Does It Escape or Lose Energy?

Jul 8, 2005 · Replies 9 · Jul 9, 2005

Replies: 9

Views: 3K

Undergrad Meaning of frames in relativity

Jul 1, 2005 · Replies 2 · Jul 8, 2005

Replies: 2

Views: 2K

Graduate Energy of motion at high speed

Jul 5, 2005 · Replies 4 · Jul 8, 2005

Replies: 4

Views: 3K

Graduate Trying to track down one of the popular physics books

Jul 5, 2005 · Replies 2 · Jul 8, 2005

Replies: 2

Views: 2K

Graduate Special Relativity & General Relativity: Length, Time, and Motion

Jul 7, 2005 · Replies 9 · Jul 8, 2005

Replies: 9

Views: 3K

Undergrad What Makes the Speed of Light and Gravity So Fascinating?

Jun 22, 2005 · Replies 14 · Jul 7, 2005

Replies: 14

Views: 3K

Graduate Lorentz Invariant: What & When?

Jul 6, 2005 · Replies 4 · Jul 7, 2005

Replies: 4

Views: 8K

Undergrad Does Magnetism Curve Space and Time

Jun 28, 2005 · Replies 14 · Jul 6, 2005

Replies: 14

Views: 12K

Graduate Can Time Dilation be Determined in a Constantly Accelerating Frame?

Jun 29, 2005 · Replies 74 · Jul 6, 2005

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Replies: 74

Views: 8K

Undergrad Measurements of time/distance be dependent on an object's velocity

Jul 3, 2005 · Replies 21 · Jul 6, 2005

Replies: 21

Views: 4K

Graduate A question about relativity model

Jul 3, 2005 · Replies 13 · Jul 5, 2005

Replies: 13

Views: 3K

Undergrad What is the shape of a black hole and how does it appear from behind?

Jul 2, 2005 · Replies 8 · Jul 4, 2005

Replies: 8

Views: 3K

Graduate Time Dilation & Generalization of SR: Beyond Light

Jul 3, 2005 · Replies 14 · Jul 4, 2005

Replies: 14

Views: 3K

Graduate Can virtual produce anti-gravity?

Jun 25, 2005 · Replies 2 · Jul 4, 2005

Replies: 2

Views: 2K

Graduate Are these predictions about the Pacific coastline true or just a coincidence?

Mar 28, 2005 · Replies 157 · Jul 4, 2005

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Replies: 157

Views: 16K

Graduate Special Relativity in a Parallel Universe

Jun 29, 2005 · Replies 41 · Jul 3, 2005

2

Replies: 41

Views: 7K

Graduate Does the Inverse Lorentz Function Model Space-Time Curvature Inversion?

Jul 3, 2005 · Replies 2 · Jul 3, 2005

Replies: 2

Views: 5K

Graduate Questions about energy conditions

Jun 17, 2005 · Replies 23 · Jul 3, 2005

Replies: 23

Views: 5K

Graduate Ricci components in Schwarzschild solution

Jun 22, 2005 · Replies 13 · Jul 1, 2005

Replies: 13

Views: 5K

Graduate How Can You Explore Black Hole Orbits with Interactive Animation?

Jun 24, 2005 · Replies 3 · Jul 1, 2005

Replies: 3

Views: 3K

Graduate Understanding Einstein's Thought Experiment & Question 10 of the Relativity Quiz

Jun 10, 2005 · Replies 43 · Jul 1, 2005

2

Replies: 43

Views: 9K

Undergrad Another Artificial Gravity Question

Jun 28, 2005 · Replies 6 · Jun 30, 2005

Replies: 6

Views: 2K

Graduate Schwarzschild metric assistance

Jun 28, 2005 · Replies 20 · Jun 30, 2005

Replies: 20

Views: 6K

Graduate Speed of Light: If You're in a Spaceship, Would Results Be Skewed?

Jun 28, 2005 · Replies 4 · Jun 30, 2005

Replies: 4

Views: 3K

Graduate Is Gravity Really a Force Keeping Us on Earth?

Jun 16, 2005 · Replies 19 · Jun 29, 2005

Replies: 19

Views: 3K

Undergrad Einstein's View of Gravity in Solar Systems

Jun 21, 2005 · Replies 16 · Jun 28, 2005

Replies: 16

Views: 5K

Graduate Strength of materials and special relativity

Jun 21, 2005 · Replies 2 · Jun 28, 2005

Replies: 2

Views: 2K

Graduate Creating Artificial Gravity: Can It Be Done?

Jun 11, 2005 · Replies 13 · Jun 28, 2005

Replies: 13

Views: 5K

Graduate Is it possible to know the future through a biological mechanism?

Dec 16, 2004 · Replies 40 · Jun 28, 2005

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Replies: 40

Views: 9K

Graduate What Happens to Time Dilation at Constant Speeds like 50% of C?

Jun 4, 2005 · Replies 7 · Jun 27, 2005

Replies: 7

Views: 3K

Graduate Is the Center of a Black Hole a Point in Time or Space?

Jun 25, 2005 · Replies 5 · Jun 27, 2005

Replies: 5

Views: 9K

Graduate Light Speed in Glass & Second Postulate of Special Relativity

Jun 14, 2005 · Replies 45 · Jun 26, 2005

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Replies: 45

Views: 8K

Graduate How Do Dimensions and Euclidean Geometry Relate to Spheres in Higher Dimensions?

Jun 24, 2005 · Replies 6 · Jun 25, 2005

Replies: 6

Views: 3K

Undergrad How would you explain the Special Theory of Relativity using Physics?

Jun 12, 2005 · Replies 10 · Jun 24, 2005

Replies: 10

Views: 4K

Graduate What Does the Derivative of the Lorentz Gamma Function Indicate?

Jun 21, 2005 · Replies 2 · Jun 23, 2005

Replies: 2

Views: 2K

Graduate Can Matter from a Black Hole's Singularity Travel Back to Our Timeframe?

Jun 23, 2005 · Replies 3 · Jun 23, 2005

Replies: 3

Views: 2K

Graduate Understanding the Paradox of Backward Time Travel: Why We Can't Go Back

Mar 21, 2003 · Replies 173 · Jun 23, 2005

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Replies: 173

Views: 35K

Graduate A New Concept of what Gravity really is?

Jun 15, 2005 · Replies 6 · Jun 23, 2005

Replies: 6

Views: 6K

Graduate Question pertaining measurement and space

Jun 22, 2005 · Replies 2 · Jun 22, 2005

Replies: 2

Views: 3K

High School Can We Really Change Time Through Speed?

Jun 21, 2005 · Replies 5 · Jun 22, 2005

Replies: 5

Views: 3K

Graduate Relativity vs. QMwhich is more fundamental

Jun 21, 2005 · Replies 13 · Jun 22, 2005

Replies: 13

Views: 3K

Graduate Solve Momentum to Get Gamma in Relativity Theory

Jun 21, 2005 · Replies 7 · Jun 21, 2005

Replies: 7

Views: 4K

Graduate Does Lorentz Force Change in Moving Frames?

Jun 17, 2005 · Replies 19 · Jun 21, 2005

Replies: 19

Views: 6K

Graduate Faster than light communication

May 20, 2005 · Replies 8 · Jun 20, 2005

Replies: 8

Views: 3K

Graduate Walking the wrong way through a wormhole?

Jun 11, 2005 · Replies 8 · Jun 17, 2005

Replies: 8

Views: 2K

Graduate Can Time Travel Take You Anywhere in the Universe?

May 24, 2005 · Replies 10 · Jun 16, 2005

Replies: 10

Views: 3K

Graduate Graviton and general relativity

Jun 15, 2005 · Replies 17 · Jun 16, 2005

Replies: 17

Views: 8K

Undergrad I am going to do a presentation on time-travel tomorrow.

Jun 12, 2005 · Replies 6 · Jun 15, 2005

Replies: 6

Views: 5K

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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