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.
I Observing a rotating body when approaching it at near light speed
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I Coordinate time between spatially separated events in Schwarzschild spacetime
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B Why does matter always escape while antimatter falls into black holes?
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I Max Time Travel Date: Can We Enjoy Moments From the Past?
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A Theoretical status of hypothesized Generic Objects of Dark Energy
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I Inertial Mass as Speedometer: Physics & Universe
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I How big are the non-mass parts of the stress-energy tensor?
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B GR & Early Universe: Time Dilation & Light Speed
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A Einstein Tensor and Stress Energy Tensor of Scalar Field
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I The Shape of Space: How Does It Move?
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I Get Standard Units Flux Multiply c^2: Perfect Fluid/Einstein's Dust
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I Invariants of the stress energy tensor
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I QFT of Gravitons in Minkowski Space vs GR
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I Light Speed Mirror Reflection: Can You See Yourself?
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B Are Gravity and Magnetism Curving Space in Similar Ways?
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I Derivation of Riemann tensor's first order-equation
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I Covariant Derivative: 2nd Diff - My Question
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B Relative Dead Stop in Deep Space
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I Godel metric in a cylindrical chart
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I Special Relativity: 2-D Collisions for Alice & Bob
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I Two rings rotating about a common center
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I Accel. in Spec. Relativity in 2-Dims: Point Test Mass
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B Light & Gravity: Impact on Spacetime?
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A Einstein and Spacetime: Debunking the Myth of Rejecting Curvature
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I Length Contraction & FTL Speeds: Are Lower Grades Faster?
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I Understanding Light from Black Holes
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I Lorentz transformation for 3 frames
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I How to See How Two Frames are Connected?
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I Playing music with Gravitational waves
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I Lie derivative of hypersurface basis vectors along geodesic congruence
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I Light pulse path, length and shape, when bouncing between two mirrors
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B Relationship between mass and energy
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I Find CTCs in Kerr Metric: Visualizing Spacetime Geometry
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I Lorentz transformation of derivative and vector field
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I Light Momentum - Does it Make Sense or Not?
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A Alcubierre Warp Drive: Intro Paper for GR Students
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I A "space elevator" extended to Neptune's orbit
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I Why Does the Angle Between Coordinate Axes in Different Frames Equal atan(v/c)?
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I Position of Particle in Special Relativity (A vs B)
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B Julius Caesar Problem from a SpaceTime Physics book
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I Can we increase an object's gravitational force by adding energy?
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I Pullback of Vector Field in Relativity: Restrictions?
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A Derive Radial Momentum Eq. in Kerr Geometry
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I Appearance of a Kerr black hole from above
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B What happens to speed and velocity in a rotating frame of reference?
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B Reference frame symmetry in Special Relativity
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I Energy Momentum Tensor Prerequisites: What Do I Need to Know?
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I Mechanical system with de Broglie-like features
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A Relativistic Hoop w/ Constant Circumference: Solving Egan's Results
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I Special relativity question driving me crazy....
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B Where did the 1/2 go in E=mc^2?
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B Is Gravity Really a Force Like the Other Fundamental Forces?
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B Proof of Specific Covariant Divergence
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B Special Theory of Relativity: Ques on Thought Experiment
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B Question about the rest frame of a photon
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A Applying General Lorentz Boost to Multipartite Quantum State
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I Is Relativity a Complete Theory? Investigating Math Formulation
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I Relativistic Energy of Rotating Thin Ring: Quick Qs
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A Why does MTW keep calling the "product rule" the "chain rule"?
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A Derivation of the Vacuum Einstein Equations: Understanding ln det g = 1
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I Problems with Einstein's 1920 "Relativity"
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I Is the Lorentz Boost Speed Nontrivially Related to Galilean Speed?
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B But in reality, time isn't relative at all, right?
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A Issue with the definition of a Lie derivative and its components (Carroll's GR)
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I Succeed in Learning Relativity: Transport, Frames, Tensors
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I How do you derive those basis vectors in GR?
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I Communication with Rindler Observer: Is It Possible?
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I Relativity of Simultaneity: What Einstein's Contribution Was
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I Okay, what exactly makes a timelike curve closed?
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I Three dimensional tracefree tensor?
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B Universe Becoming a Black Hole: What Would It Look Like?
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I On the Relativity of Lengths and Times
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I Applying the spacetime interval to regular vectors instead of curves
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B Can a rod survive dipping into a supermassive black hole's event horizon?
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A Einstein, Mach's Principle, and the Speed of Light Limit
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I Velocity u > c? Faster Than Light Comm?
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Only Three People Understand General Relativity
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I Proper (and coordinate) times re the Twin paradox
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I Duration of a round-trip to Alpha Centauri
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I Locally Cartesian Coordinates on the Sphere
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B Dark Matter -- Could dark matter be standard matter from the past?
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A Can Time Travel Teleportation Be Achieved with Computer Bytes and Radio Signals?
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A When and Why Was the Definition of the Meter Changed?
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I Understanding Boosts in Misner Space: Where Do They Come From?
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B Difficulty with derivatives using the Lorentz transformations
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B Does Local Gravity Override Dark Matter in Galactic Rotation?
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I Lorentz Transformations: Linearity & Best Argument
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A Time Dilation in Gravitational Fields: Are Equivalent Formulas?
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B Lightyear Distance: Understand Its Impact
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I Apply Conservation Law to Euler-Lagrange Equation
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I Light Cone in Rindler Coordinates: Visualization & Reasoning
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I Headlight Effect of Moving Light Source: Formula
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B Physics near the event horizon
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I Learn About Conservation Law & Geodesic Equation
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I Shouldn't a moving clock appear to be ticking faster instead of slower?
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I Rindler Coordinates & Quadrants: Resolving an Issue
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B Is Gravity Truly a Force According to Relativity?
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I Solving Geodesic Equations with Godel Metric
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I Is this the only form of the Minkowski metric?
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I Curved Space-Time: Understanding How Nothing Has Shape
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