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.
Graduate Trampoline analogy for gravity
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Graduate What happens to a person in free-fall at the center of the Earth?
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Graduate Maxwell Field in General Relativity: Explained
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Graduate Relative Speed of Two Inertial Frames | Proving It Must Be Same
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Graduate Gauge Invariance of Weak Gravity Approximation
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Graduate Is the Schwarzschild Metric Always Applicable to Black Holes?
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Graduate Measuring Tape, Speed of Light & Time Dilation
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Graduate Causality in Relativity: Examining the Illusion of Simultaneous Cause and Effect
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Graduate Hypothetical FTL communication black-boxes and causality
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Graduate Question about Metric Tensor: Can g_{rr} be Functions of Coordinate Variables?
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Graduate How does GPS correct for time dilation?
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Graduate Questions about FLRW Metric: Finiteness, Radial Coord & More
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Graduate Metric matrix for binary star system?
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Graduate Einstein's Field Equations: Effective Potential Functions
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Graduate Index-Free Decomposition of Derivative Timelike Congruence
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Graduate What is Spherically Symmetric Radiation-Filled Universe?
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Graduate How Did Clifford's Theories Influence Modern Physics and String Theory?
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Graduate Does gravity indeed travel in waves?
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Graduate Active/Passive Diffeomorphisms – clarification on Rovelli’s
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Graduate Computing Curvature of Space at Point from Mass - Help Needed
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Graduate Is mass movement influenced by the curvature of spacetime?
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Graduate Schwarzschild Radius Derivation: Is it Possible Classically?
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Undergrad Quick calculation check please
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Graduate How do closed timelike curves avoid mass discontinuities in spacetime?
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Graduate Speed of light postulate and clock synchronization
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Graduate I just want your guys opinion on my idea against E=mc
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Graduate Could the universe exist without space and time?
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Graduate Time Passes Faster: Moving Frame w/ Many Clocks
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High School Understanding Time: A Scientific Approach
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Graduate Relative Observed Speed: Earth-Falling Objects & Time Dilation
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Graduate Measuring the One-Way Speed of Light: Roadblocks & Solutions
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Undergrad Relative Time: Earth vs Mars - A Physics Enthusiast's Question
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Graduate How Do Spinors Fit in With Differential Geometry
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Graduate Combining Special Relativity & Newtonian Gravity: Can We? Why?
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Graduate Dark Energy: Negative Pressure or Density?
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Graduate Derivative of Vector Field: Connection Needed?
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Undergrad What are the energy implications of time travel into the future?
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Graduate Can Each Particle Experience Time as Its Own Observer?
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Undergrad Time Dilation Confusions - A Physics Newbie's Questions
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Graduate What is a Frame of Reference in Physics?
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Graduate Measuring One-Way Speed of Light: Experiments & Ideas
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Graduate Gravitational equations used in model of orbiting bodies
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Graduate Lowering Indices: Tensor Calculus Basics
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Graduate Mass Warping Spacetime Explained: Quantum Field Theory
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Graduate Time Dilation Effects on Observer Perception
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Graduate Black Hole Event Horizon: Is There a Physical Boundary?
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Graduate Tensor Contraction: Contracting ##\mu## with ##\alpha##?
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Graduate Einstein vs Newton: Does GR Disprove Gravitation?
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Graduate Black Hole Singularity: Infinite Mass & Merging Supermassive Black Holes
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High School Will This Method Yield Absolute Synch?
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Graduate Geodesic Deviation Equation Solved
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Graduate Mass Warping Spacetime: QFT & Gravitons Explained
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Graduate FRW Metric: Parameter k & Space/Space-Time Relationships
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Undergrad Solving the Mystery of e=mc^2: Understanding the Power of Squared in Physics
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Graduate Gravitation on an Expanded Earth
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Graduate Energy-momentum tensor radiation-dominated universe.
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Graduate Both frames of reference predict the other is slower -- proof
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Graduate Questions about Time/Speed/Light
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Graduate Uncurving the Universe: Expansion After Big Bang & Energy Loss
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Graduate Elliptical Orbits In The Schwarzschild Metric
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Graduate Problem Book in Relativity and Gravitation, online, free
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Graduate Solving Lorentz Matrix Product Problem - Help Needed
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Graduate Do gravitational time dilation effects cancel out or add up?
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Graduate Rotating Disk and Time Dilation
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Graduate What Time Is It? An Exploration of Time Dilations & Relativity
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Graduate Einstein Velocity Addition for Relative Speed Calculation
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Graduate Time Travel Possibility: Scottish Scientists Slow Light Speed?
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Graduate Relativistic Definition of Energy: E=Fd or E=md2/t2?
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Graduate Asymptotic velocity under constant force?
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Graduate Covarient Maxwell: Explaining 2nd Line From Attachment
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Graduate Calculating Time Distortion Caused by Massive Objects: Explained with Formula
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Graduate Is Mass Equivalence Explained by the Relationship Between Energy and Gravity?
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Graduate Energy Conservation Paradox: Is It True or Not?
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Graduate How to Determine Frame Size with Lorentz Transformation
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Graduate A problem regarding time dilation
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Graduate Solving Einstein's Field Equation: The Schwarschild Metric & Beyond
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Undergrad Acceleration & Special Relativity: Explained
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Graduate CMBr & Absolute Motion: A Query
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Graduate S DILEMMA: Time Dilation in Simple Harmonic Motion?
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Graduate The co-moving frame - acceleration, momentum and velocity
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Graduate Time dilation why or how, Special Relativity causes
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Graduate Would the one accelerating please stand up?
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Graduate Understanding Homogeneity & Isotropy in FRW Metric
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Graduate Massive Object Paradox: Traveling Near Speed of Light?
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Graduate Parallel Transport & Covariant Derivative: Overview
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Graduate Understand Electromagnetic Force in Different Inertial Frames
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Graduate General Relativity: Manifold/Sub-Manifold Metric Theorem Q-Schwarzschild
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Graduate Quick Questions on Free Indices - Four-Vector Notation
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Graduate Deriving Geodetic Line by Einstein: Clarifying Difficulties
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Graduate When can a metric be put in diagonal form?
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High School Does light revolve around mass like the moon orbits the Earth?
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Graduate Signature, boundary conditions and topology
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Undergrad Relative velocity time dilation question
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Graduate A plane shoots a bullet -- energy at different frame?
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Undergrad Does gravity affect a magnetic/electric field?
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Graduate Ds^2 Invariant Interval: Sign Dependence?
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Graduate Deriving FRW Metric: Ricci Vector Algebra Explained
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Graduate Solve Einstein Field Equation without Vacuum Solution
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Graduate Difference between images produced by gravitational lensing
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Graduate I'm having trouble understanding Lorentz transforms
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