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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.

Prefix: Undergrad

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Undergrad Inside the Schwarzschild horizon

Apr 19, 2019 · Replies 5 · Apr 20, 2019

Replies: 5

Views: 1K

Undergrad Gravitational Waves: Prerequisites for Study

Apr 19, 2019 · Replies 1 · Apr 19, 2019

Replies: 1

Views: 1K

Undergrad Accelerating into a black hole?

Apr 18, 2019 · Replies 7 · Apr 19, 2019

Replies: 7

Views: 2K

Undergrad Is the Equation for Relativistic Two-Body Decay Correct?

Apr 19, 2019 · Replies 1 · Apr 19, 2019

Replies: 1

Views: 4K

Undergrad Deriving E&B Fields from Plane Wave 4-Potential

Apr 16, 2019 · Replies 5 · Apr 17, 2019

Replies: 5

Views: 2K

Undergrad Compute Physical Coordinates of an Event in a Curved Spacetime

Apr 16, 2019 · Replies 1 · Apr 16, 2019

Replies: 1

Views: 1K

Undergrad Vaidya Metrics: Outgoing M(u) Conditions & Phys. Situations

Apr 15, 2019 · Replies 3 · Apr 16, 2019

Replies: 3

Views: 1K

Undergrad Does this contradict or require GR?

Apr 12, 2019 · Replies 15 · Apr 13, 2019

Replies: 15

Views: 2K

Undergrad E on q independent of v - confusing?

Nov 23, 2010 · Replies 1 · Apr 13, 2019

Replies: 1

Views: 2K

Undergrad Easy ways to explain special & general relativity

May 6, 2010 · Replies 1 · Apr 13, 2019

Replies: 1

Views: 2K

Undergrad Falling Into a Black Hole: Time Dilation & Hawking Radiation

Apr 11, 2019 · Replies 9 · Apr 13, 2019

Replies: 9

Views: 3K

Undergrad Photon Patterns in Space: Could They Exist?

Apr 10, 2019 · Replies 11 · Apr 11, 2019

Replies: 11

Views: 2K

Undergrad Particles w/ 0 Inertial Mass Traveling Faster than Light?

Apr 10, 2019 · Replies 9 · Apr 10, 2019

Replies: 9

Views: 2K

Undergrad Looking for more accurate energy-momentum transformations for photons

Mar 31, 2019 · Replies 35 · Apr 10, 2019

2

Replies: 35

Views: 4K

Undergrad Reading suggestions about the "nature of time"

Apr 6, 2019 · Replies 27 · Apr 8, 2019

Replies: 27

Views: 3K

Undergrad Transverse inertial motion of rockets in acceleration

Apr 6, 2019 · Replies 18 · Apr 8, 2019

Replies: 18

Views: 2K

Undergrad Gravitational Waves: Questions on Mass & Escape Velocity

Apr 6, 2019 · Replies 5 · Apr 6, 2019

Replies: 5

Views: 2K

Undergrad Time Dilation Effects - Understand without Clocks

Apr 5, 2019 · Replies 6 · Apr 6, 2019

Replies: 6

Views: 1K

Undergrad Uniqueness Theorems in Non-Flat Spacetime

Apr 4, 2019 · Replies 3 · Apr 5, 2019

Replies: 3

Views: 2K

Undergrad Is the Delta Function a Scalar?

Apr 3, 2019 · Replies 1 · Apr 3, 2019

Replies: 1

Views: 2K

Undergrad Fastest Cause & Effect: Electric Field & Magnetic Field

Mar 27, 2019 · Replies 7 · Apr 3, 2019

Replies: 7

Views: 2K

Undergrad Conserved Stress-Energy in Gravitational Theories

Apr 1, 2019 · Replies 6 · Apr 2, 2019

Replies: 6

Views: 2K

Undergrad Determining c from Maxwell's Equations

Nov 22, 2016 · Replies 31 · Apr 1, 2019

2

Replies: 31

Views: 9K

Undergrad Invariance of Action: Lagrangian Transformation

Mar 28, 2019 · Replies 3 · Mar 30, 2019

Replies: 3

Views: 2K

Undergrad Gravity Waves or Gravity Delay: Which Concept Explains Our Cosmic Stretching?

Mar 28, 2019 · Replies 4 · Mar 28, 2019

Replies: 4

Views: 2K

Undergrad Gravitational Waves & Matter: Causes, Effects & Thresholds

Mar 26, 2019 · Replies 3 · Mar 26, 2019

Replies: 3

Views: 2K

Undergrad Free Particles & Geodesics: Do They Go Hand-in-Hand?

Mar 21, 2019 · Replies 20 · Mar 23, 2019

Replies: 20

Views: 2K

Undergrad Space-time curvature and the fabric of space

Feb 27, 2019 · Replies 13 · Mar 19, 2019

Replies: 13

Views: 3K

Undergrad Confusion about index notation and operations of GR

Mar 17, 2019 · Replies 8 · Mar 19, 2019

Replies: 8

Views: 4K

Undergrad Black hole orbital mechanics questions

Mar 9, 2019 · Replies 16 · Mar 18, 2019

Replies: 16

Views: 3K

Undergrad Gravitational field versus acceleration

Mar 10, 2019 · Replies 20 · Mar 16, 2019

Replies: 20

Views: 3K

Undergrad Relativistic form of the displacement current using the Biot-Savart Law

Mar 8, 2019 · Replies 26 · Mar 16, 2019

Replies: 26

Views: 3K

Undergrad Why do particles around us have finite momenta?

Mar 14, 2019 · Replies 21 · Mar 15, 2019

Replies: 21

Views: 2K

Undergrad Can this event vary relatively?

Mar 12, 2019 · Replies 18 · Mar 15, 2019

Replies: 18

Views: 2K

Undergrad Maxwell's Equations in Different Lorentz Frames: Are They Equivalent?

Mar 10, 2019 · Replies 16 · Mar 14, 2019

Replies: 16

Views: 2K

Undergrad General Relativity and light deflection

Mar 12, 2019 · Replies 4 · Mar 13, 2019

Replies: 4

Views: 2K

Undergrad Solving for Gravity Without Gravitational Constant - Little g vs Big G

Mar 10, 2019 · Replies 17 · Mar 11, 2019

Replies: 17

Views: 2K

Undergrad Fermi-Walker: Showing Rotation in Plane of 4-Accel & 4-Vel

Mar 8, 2019 · Replies 7 · Mar 9, 2019

Replies: 7

Views: 2K

Undergrad Finding Most General Form of Rindler Coordinates

Mar 6, 2019 · Replies 4 · Mar 6, 2019

Replies: 4

Views: 1K

Undergrad Electromagnetic Curr. in Curved Spacetime: Questions Answered

Mar 4, 2019 · Replies 12 · Mar 5, 2019

Replies: 12

Views: 2K

Undergrad Proper Acceleration: Why d^2x^α/dτ^2 is Not Ideal

Mar 4, 2019 · Replies 12 · Mar 4, 2019

Replies: 12

Views: 2K

Undergrad Maximally symmetric sub-manifold (2-sphere)

Mar 1, 2019 · Replies 25 · Mar 4, 2019

Replies: 25

Views: 2K

Undergrad On The Length of a Meter Stick

Mar 4, 2019 · Replies 19 · Mar 4, 2019

Replies: 19

Views: 2K

Undergrad Geodesics in 4D Spacetime: An Overview

Mar 2, 2019 · Replies 9 · Mar 3, 2019

Replies: 9

Views: 2K

Undergrad How Does the Metric of a 4-D Spacetime Define Its Symmetry and Expansion?

Mar 2, 2019 · Replies 1 · Mar 2, 2019

Replies: 1

Views: 1K

Undergrad Measuring the Speed of Light: Time of Flight Experiments

Feb 27, 2019 · Replies 15 · Mar 1, 2019

Replies: 15

Views: 2K

Undergrad Solving Special Relativity Problem w/ Two Spaceships

Feb 28, 2019 · Replies 3 · Feb 28, 2019

Replies: 3

Views: 2K

Undergrad Connecting Geodesic Curves and the Covariant Derivative

Feb 25, 2019 · Replies 11 · Feb 27, 2019

Replies: 11

Views: 2K

Undergrad Conservation of energy-momentum (tensor)

Feb 26, 2019 · Replies 22 · Feb 27, 2019

Replies: 22

Views: 3K

Undergrad Spacetime Curvature: Eliptical Orbital Paths & Keppler Laws

Feb 27, 2019 · Replies 5 · Feb 27, 2019

Replies: 5

Views: 2K

Undergrad Covariant derivative of tangent vector for geodesic

Feb 25, 2019 · Replies 14 · Feb 26, 2019

Replies: 14

Views: 3K

Undergrad Implication of length contraction

Feb 23, 2019 · Replies 17 · Feb 26, 2019

Replies: 17

Views: 3K

Undergrad Is my reasoning about commutators of vectors right?

Feb 26, 2019 · Replies 3 · Feb 26, 2019

Replies: 3

Views: 1K

Undergrad Is there a zero-mass, vacuum Schwarzschild GR solution?

Feb 23, 2019 · Replies 27 · Feb 25, 2019

Replies: 27

Views: 3K

Undergrad Schwarzschild metric not dependent on time

Feb 20, 2019 · Replies 58 · Feb 25, 2019

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Replies: 58

Views: 5K

Undergrad Contravariant Vector Transformation in Spherical Polar Coordinates

Feb 24, 2019 · Replies 13 · Feb 25, 2019

Replies: 13

Views: 2K

Undergrad Parallel transport of tangent vector....(geodesic)

Feb 25, 2019 · Replies 12 · Feb 25, 2019

Replies: 12

Views: 3K

Undergrad Perturbation to Flat Space Metric: Geodesic Equation

Feb 23, 2019 · Replies 6 · Feb 24, 2019

Replies: 6

Views: 2K

Undergrad Speed of Light Measured by Jupiter's Moons: Error 26%?

Feb 23, 2019 · Replies 6 · Feb 23, 2019

Replies: 6

Views: 2K

Undergrad Confusion about Simultaneous Events in Relativity

Feb 17, 2019 · Replies 13 · Feb 20, 2019

Replies: 13

Views: 3K

Undergrad Bending of light - Newton vs. Einstein

Feb 19, 2019 · Replies 22 · Feb 20, 2019

Replies: 22

Views: 3K

Undergrad Frame Dragging Effect vs Spin Orbit Coupling in GR

Feb 18, 2019 · Replies 8 · Feb 19, 2019

Replies: 8

Views: 2K

Undergrad Schwarzschild: Energy Conservation at Finite r

Feb 19, 2019 · Replies 1 · Feb 19, 2019

Replies: 1

Views: 1K

Undergrad Inertial Ref: Can Light Photons Be a Privileged Frame?

Feb 15, 2019 · Replies 9 · Feb 17, 2019

Replies: 9

Views: 2K

Undergrad Books on Spacetime Hypersurfaces & Foliations of Space Time

Feb 16, 2019 · Replies 2 · Feb 17, 2019

Replies: 2

Views: 2K

Undergrad Is Absolute Position Necessary to Understand Relativity?

Feb 17, 2019 · Replies 5 · Feb 17, 2019

Replies: 5

Views: 2K

Undergrad Gamma in Brans-Dicke framework

Feb 15, 2019 · Replies 5 · Feb 15, 2019

Replies: 5

Views: 1K

Undergrad Symmetric Connection: Does Torsion Vanish?

Feb 14, 2019 · Replies 3 · Feb 15, 2019

Replies: 3

Views: 2K

Undergrad What are the metric components in the Brans-Dicke action?

Feb 14, 2019 · Replies 14 · Feb 14, 2019

Replies: 14

Views: 2K

Undergrad GR: Electric & Magnetic Effects - Consequences

Feb 14, 2019 · Replies 7 · Feb 14, 2019

Replies: 7

Views: 2K

Undergrad Einstein-Hilbert Action, Lagrangian Density & Vacuum Fields

Feb 14, 2019 · Replies 1 · Feb 14, 2019

Replies: 1

Views: 2K

Undergrad Relativistic mass and gravitational potential

Feb 13, 2019 · Replies 6 · Feb 14, 2019

Replies: 6

Views: 2K

Undergrad Acceleration of a relativistic particle

Feb 13, 2019 · Replies 7 · Feb 13, 2019

Replies: 7

Views: 2K

Undergrad Is this answer about Lorentz transforms correct?

Feb 11, 2019 · Replies 5 · Feb 13, 2019

Replies: 5

Views: 2K

Undergrad Allowed fields in General Relativity

Feb 6, 2019 · Replies 14 · Feb 9, 2019

Replies: 14

Views: 2K

Undergrad Uniqueness theorems for black holes

Feb 5, 2019 · Replies 12 · Feb 8, 2019

Replies: 12

Views: 3K

Undergrad Invariance of timelike Killing vector of Schwarzschild sol.

Feb 7, 2019 · Replies 3 · Feb 7, 2019

Replies: 3

Views: 2K

Undergrad Can the Lorentz factor be modified for non-inertial frames?

Feb 5, 2019 · Replies 12 · Feb 7, 2019

Replies: 12

Views: 3K

Undergrad Cosmological Constant Term in Einstein Equations

Feb 5, 2019 · Replies 2 · Feb 6, 2019

Replies: 2

Views: 2K

Undergrad General Relativity rocket puzzle

Jan 31, 2019 · Replies 84 · Feb 5, 2019

3

Replies: 84

Views: 8K

Undergrad What happens to the energy lost by photons in gravity?

Nov 1, 2018 · Replies 38 · Feb 5, 2019

2

Replies: 38

Views: 5K

Undergrad Gravitational wave interference

Feb 2, 2019 · Replies 9 · Feb 5, 2019

Replies: 9

Views: 3K

Undergrad Question about the limits of space contraction near light speed

Feb 4, 2019 · Replies 10 · Feb 4, 2019

Replies: 10

Views: 2K

Undergrad Is Simultaneity in Einstein's Thought Experiment a Matter of Perspective?

Feb 1, 2019 · Replies 22 · Feb 2, 2019

Replies: 22

Views: 2K

Undergrad Calculating Acceleration of Gravity w/ Geodesic Deviation: Troubleshooting

Jan 24, 2019 · Replies 22 · Feb 1, 2019

Replies: 22

Views: 5K

Undergrad Legendre Transform: Momentum & Velocity

Jan 31, 2019 · Replies 2 · Feb 1, 2019

Replies: 2

Views: 2K

Undergrad Massive Particles in Sonic & Slow Light Black Holes

Jan 27, 2019 · Replies 2 · Jan 31, 2019

Replies: 2

Views: 2K

Undergrad Photon Timelessness: Does It Exist?

Jun 6, 2017 · Replies 27 · Jan 29, 2019

Replies: 27

Views: 6K

Undergrad Energy Density & Mass Density: Explained

Jan 28, 2019 · Replies 2 · Jan 28, 2019

Replies: 2

Views: 2K

Undergrad About spacetime coordinate systems

Jan 17, 2019 · Replies 37 · Jan 27, 2019

2

Replies: 37

Views: 6K

Undergrad Any direct evidence of gravitational mass increase?

Jan 21, 2019 · Replies 39 · Jan 27, 2019

2

Replies: 39

Views: 5K

Undergrad Speed of Light in Materials: Explained

Jan 26, 2019 · Replies 4 · Jan 27, 2019

Replies: 4

Views: 2K

Undergrad Falling electric dipole contradicts the equivalence principle?

Jan 20, 2019 · Replies 3 · Jan 26, 2019

Replies: 3

Views: 2K

Undergrad Why Are Maxwell's Equations Invariant Across Reference Frames?

Jan 24, 2019 · Replies 11 · Jan 26, 2019

Replies: 11

Views: 3K

Undergrad What does coupling mean in physics?

Jan 18, 2019 · Replies 5 · Jan 26, 2019

Replies: 5

Views: 4K

Undergrad Paradox: Rocket ship moving in a circle

Jan 22, 2019 · Replies 12 · Jan 26, 2019

Replies: 12

Views: 2K

Undergrad Energy Tensor Gradients: ∂βTμυ

Jan 24, 2019 · Replies 5 · Jan 26, 2019

Replies: 5

Views: 2K

Undergrad Allowed transformations in General Relativity

Jan 21, 2019 · Replies 12 · Jan 24, 2019

Replies: 12

Views: 2K

Undergrad What do we mean when we say something transforms "under"....

Jan 21, 2019 · Replies 4 · Jan 22, 2019

Replies: 4

Views: 2K

Undergrad Gravitational Time Dilation: Radius & Clock Rate Variation Explained

Jan 22, 2019 · Replies 2 · Jan 22, 2019

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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