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.
High School Where Are the Boundaries of the Universe and How Can We Measure Them?
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Graduate Moving faster than light in Schwarzshield radius
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Graduate Does an explicit list of 20 independent compenents of Riemman exist?
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Graduate Action & Reaction: Equal Opposites
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Graduate Space and Earth's (and other planet's) movement through it
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Graduate Checking if Schwarzschild Space-Time is Locally Minkowskian
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Graduate The Physics of Length Contraction of physical objects and distances
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Graduate Calculating M from Charge & Angular Momentum in Black Hole
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Undergrad Lorentz transform low velocity limit
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Graduate Exactly Why C is impossible for Massive Objects?
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Graduate Photon mass - clarification request
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Graduate Understanding Acceleration and Geodesics in Curved Spacetime
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Graduate Is the Modified Lagrangian Formula Correct in Ray D Inverno Problem 11.5?
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Graduate Connected Space-Times: Why is it Assumed in General Relativity?
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Undergrad What are the accepted theories for the source of gravity?
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Graduate Why Is General Relativity Nonlinear Compared to Other Fundamental Equations?
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Graduate How Does Special Relativity Explain Particle Attraction?
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Graduate Seeing the entire future of the Universe
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Graduate (Almost) Black Hole = Fast Space Ship?
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Graduate Total energy derivation: energy as a time component of a four-vector
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Undergrad How Does Time Dilation Affect Clocks at Different Speeds?
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Graduate Relativistic Energy Derivation math problem
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Graduate Recommended reading on Kaluza-Klein theories.
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Graduate What is the dielectric momentum density 4-vector?
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Graduate Time slowing down due to speed relative to the observer
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Graduate The consistency of the speed of light
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Graduate Lorentzian 2-Manifold Local Conformal Flatness: Explained
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Graduate Do I arrive before a light-speed train if I jump off the front?
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High School Motion to Rest: What Does the Universe Agree On?
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Graduate Math Questions in Lorentzgroup: Covariance/Contravariance Explained
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Graduate A question on a tweek of the Twin Paradox
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High School Why Can't I See the Earth Rotating Below Me?
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Graduate Who first studied variable speed of light? - Einstein
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Graduate Speed of Light: Universe's Expansion After Big Bang
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Graduate What does it mean: transforms like a vector
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Graduate Rank-2 tensor: multiple definitions
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Graduate Does gravity affect to wavelengths?
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Graduate The importance of the relative movement
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Graduate Weyl tensor in 2 dimensions- confused
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Graduate Understanding the Passage of Objects through the Event Horizon of a Black Hole
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Graduate Relativity and matter by Pauli
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Graduate Applying Forces to Particles: Questions Answered
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Undergrad Caught Between Two Gravitational Fields
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Graduate Is General Relativity Dependent on the Existence of a Manifold?
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Graduate Birkhoff's Theorem: Exterior Solution to Einstein's Field Equations
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Graduate Why Does Space/Time Not Cause Friction?
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Graduate When Clocks Meet: Investigating Time in Einstein's Special Relativity
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Graduate Exercise 2.5 in Misner, Thorne and Wheeler
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Graduate Pushing with a lorentz contracting stick
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Graduate Is the Sun invisible at relativistic speeds? Part II
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Graduate Quick question, Komar integral derivation in Wald
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Undergrad Speed of Gravity: 299792458 m/s?
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Graduate Relativity in a Rotating Space Station
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Graduate Black holes , gravity upper limit
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Graduate Recommendaton for Clarifying Special Relativity
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Graduate Formulating Position Vector with f(t)
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Graduate Can Observers See the Future in Relativity?
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Graduate Finding the 4x4 Cofactor of a Covariant Metric Tensor g_{ik}
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Graduate Maxwell's Equations in Curved Space-time
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Graduate Reconciling APOD BH Videos w/ Physics Forums Discussion
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Graduate Classification of Gravitational Theories
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Graduate Why do objects fall through curvature of spacetime?
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Graduate Is a Topological Action Defined by the Underlying Space?
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Graduate Singularity Mechanics? Blackhole Spin
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Graduate The reason why you can't accelerate to light speed
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High School Terminology of Convert: What's the Right Term?
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Graduate Understanding Mass in Relativity Theory: Definitions and Conflicting Views
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Graduate Photon energy changing due to Dopplershift?
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Graduate Measuring velocity in empty space
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Graduate Distances between planet and observer near BH
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Graduate Relativity of simultaneity objections
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Graduate How could a photon travel at lightspeed if it has mass?
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Graduate Accelerating Expansion of Space-Time and Implications for Time Itself
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High School Space Time Explained: Physics & E=mc^2
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Graduate Objects accellerating due to each other's gravity
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Graduate Does Time Really Flow Backwards?
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Graduate Penrose Diagrams - Introduction
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Undergrad Observer S' on a rocket vs an observer S on Earth
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Graduate Need flat spacetime to define mass and spin?
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Graduate Confused about length contraction
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Graduate Time & Speed of Photon: Questions Answered
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Undergrad Does Energy Gravitate? A Check of Understanding
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Graduate Does a photon experience time when slowed down by gravity?
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Graduate Condition for close timelike curve?
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Graduate Mass & Velocity: Gaining Momentum with Speed
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Graduate Seeking clarification of time dilation
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Graduate Why we won't notice anything special when crossing the horizon?
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Graduate Adding subluminal and superluminal velocities.
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Graduate Acceleration and gravity, conceptual problems.
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Graduate Upper limit for black hole’s rotational speed
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Graduate What is the most fundamental axiom of General Relativity?
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Graduate Reading Einstein's book & confused about simultaneous events
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Undergrad Why is light the fastest possible speed
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Undergrad Gravity at its maximum range question.
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Graduate Exterior derivative identity in vacuum space-time
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Graduate Radial Schwarzschild geodesics - again
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Graduate Riemann curvature scalar, Ricci Scalar.What does they measure ?
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Graduate Unified or Fractured? Universe Info Transmission Speed
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Graduate How does matter accelerate in a gravitational field
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Graduate Muon Lifespan: How We Measure Decaying of Muons
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