Special and General Relativity Forum

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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.
Undergrad Is motion through space or spacetime?
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High School Could information travel faster than C
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Undergrad Are the Lorentz transformation formulas on wikipedia correct?
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Undergrad Does non-gravitational acceleration produce waves?
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High School How does relativity impact our everyday lives beyond GPS and nuclear energy?
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High School Can a black hole event horizon grow at the speed of light?
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Undergrad Space & Time: 2 Qs for Forum Members
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Undergrad Gravitational Constant in GR: How & Why?
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Graduate Theories that respect one form of the equivalence principle but violate another
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Undergrad Energy Locally Never Negative: Explained
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High School Does space contraction regard the moving body or the path?
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Graduate Relativistic orbital precession in practice
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Graduate Momentum 4 Vector Notation: Differences Explained
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Undergrad Production of Gravitational Waves Problem: Energy Flux
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Graduate Covariant derivative definition in Wald
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Undergrad Proper mapping of the second postulate into math
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Undergrad Why curved spacetime produces gravity (am I right?)
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Undergrad Why Can't Lorentz Boosts be Used for Length Contraction?
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High School Magnetic field at relativistic speed
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Undergrad Spacetime Changes vs Matter Location Inside
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Undergrad What is Planck curvature and its significance in the expansion of the universe?
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High School Is the Universe discrete or continuous?
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Graduate Understanding Dirac Adjoint Derivation & Spinor Transformations
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High School Newtonian vs Relativistic Mechanics
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Graduate Investigations into a heuristic Lagrangian of graviton field
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Undergrad Event Horizon of Telescope Through Earth: Does It Exist?
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High School Golf Ball in Flat Space-Time: Return or Shift?
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Undergrad Implications of Relative Simultaneity: Carl & Shirley's Observations
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High School Torch Contraction Problem in SR: A and B Observe Differently
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Undergrad Clock Thought Exp: A Light-Year Time Paradox
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Undergrad Are Special Relativity effects valid for angular velocity?
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High School What Is Negative Energy and How Does It Affect the Universe?
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Graduate GWs energy and aLIGO detection
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Undergrad Parametrisation of timelike curves using proper time
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Graduate Do black holes lose hair in finite time?
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High School Relativistic Sphere: Length Contraction & Volume
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Undergrad Is Maxwellian Gravitoelectromagnetism a useful analogy?
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High School How to Develop in Series: Definition & Examples
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Insights Roger Babson's Anti-Gravity Contest - Comments
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Undergrad Zeroth component of 4-momentum & energy-momentum relation
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High School Do All Black Holes Have the Same Density?
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Undergrad (How) does the LIGO experiment falsify Newtonian gravity?
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High School Time Dilation & Relativity: Going Back
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Undergrad How Are Gravitational Waves Connected to Black Holes?
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High School Space-Time: Does it Follow Newton's Third Law?
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Undergrad Mass to Energy Transformation for ordinary Chemical reaction
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Undergrad Uncharged Particle near Charged Mass
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Undergrad Breakthrough Starshot: 1st Macroscopic Test of Longitudinal Acceleration
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Insights A Geometrical View of Time Dilation and the Twin Paradox - Comments
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High School How can we tell that "fictitious forces" are not real?
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Undergrad What is the essence of general relativity for beginners?
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High School What are Lorentz Factors? | Definition & Explanation
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Undergrad My lecturer says "Special relativity is absolutely wrong"
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High School Escape Velocity & Black Holes: Can Something Escape?
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Undergrad Gravity Waves & Gravitomotive Force: Is Rotation Possible?
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Graduate NASA's experiment with a gyroscope featured in Fabric of the Cosmos
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Undergrad Why is speed of light constant in all frames of reference?
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Undergrad Normal Vector & Acceleration: An Explanation for Julien
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Undergrad Definition of a Lorentzian Wormhole
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Undergrad Doppler shift for an observer in circular motion
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Graduate Numerical simulation the n-body problem under SR model
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Undergrad Stanford: objects in spacetime all move at constant speed c?
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High School Acceleration at Near-Light Speed: Answers
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High School Why does time slow down instead of speed up when traveling at high speeds?
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Undergrad Light speed and the LIGO experiment
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Undergrad Understanding 4-Momentum in General Relativity
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Graduate Meaning of ds^2 according to Carroll
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Undergrad Is the Block Universe Model Necessary if Presentism Can Adapt to Relativity?
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Undergrad Newtonian limit of Schwarzschild metric
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High School Understanding Gravity & Orbits in Light of Relativity
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Undergrad De Broglie Matter Waves: Where Does the Fraction Come From?
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Graduate Metric of n-sheeted AdS_3: Constructing BTZ
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Undergrad Can Tachyonic Antitelephone Overcome Causality and Chronology Protection?
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High School Does your age only change when accelerating?
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Graduate Equation of Motion of Spin Connection: Help Needed
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High School Is the mass of a photon always negligible compared to that of a proton?
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High School Gravitational Waves Speed: Can We Observe It?
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Undergrad Geodesics in Curved Spacetime: What is the Significance of the ct Increment?
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Undergrad Generalization of Lorentz ether
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High School Understanding the Cosmic Microwave Background
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Undergrad Is Zitterbewegung Considered in the Theory of Relativity?
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Undergrad New interpretations of the Pioneer effect ?
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Undergrad Understanding 4-Momentum in Special Relativity
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High School GR: Using Earth as a Reference Frame - Q&A
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High School Possible title: Could Discontinuous Spacetime Explain Gravity?
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High School Einstein's theory of relativity
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Undergrad Confusion about killing horizon in Carroll
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Undergrad The Order and Valence of Tensors
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Undergrad Proving Orthogonality of Vector w/ Schnutz Special Relativity Tensors
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Undergrad Open Problem in S.R. Pre-Determinism: Unresolvable Question
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High School Help understanding this derivation of relativistic Doppler
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Undergrad Deriving Einstein's Relativity Postulates from Minkowski Spacetime
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High School Understanding Symmetry: Navigating Observations and Asymmetry in Closed Systems
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Graduate Evolution of Scalar Field: Equation Demonstration
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High School Length contraction vs Space time
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Undergrad Measuring Speed of Light from Galaxies & Shapiro Time Delay
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Undergrad Time Dilation: Lorentz Transf. & Proper Time Equations
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Undergrad Frame dependency of accelerations
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High School A Speed of Light Theoretical Question
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Undergrad Basic question, harmonic coordinate condition algebra
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