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 "Time is an illusion" according to Einstein
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High School How Do Physicists Explain Black Hole Formation and Electromagnetic Repulsion?
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Graduate Index-Free Expressions & Unique Metric-Compatible Connections
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High School What Happens to Time on a Clock at r=r_{s}/2 Inside a Schwarzschild Black Hole?
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Undergrad The Twin Paradox implies that the Universe as a whole is a special frame
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Undergrad Orbits of Photons Around a Massball: Explained
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Undergrad Deriving Lorentz Transformations Using Calculus
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Undergrad Apparent Violations of Principle of Relativity?
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Undergrad A version of the twin paradox without accelerations
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Undergrad Proving Antisymmetry of Electromagnetic Field Tensor with 4-Force
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Undergrad Does General Relativity explain inertia?
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Undergrad Twin Paradox: Who Is Right, A or B?
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High School Detecting Gravitational Waves: Earth-Like Planet Possibility
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High School How to select the smooth atlas to use for spacetime?
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Undergrad Thought Experiment Proving Newtonian Momentum Not Conserved
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Undergrad Spherically Symmetric Metric: Is Singularity Free?
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Undergrad Do moving massive objects drag curved spacetime with them?
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Undergrad Mass of the Moon and Gravitational Lensing
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Undergrad Gravitational Redshift: Units, Velocity & Ratio Explained
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Undergrad Calculating Surface Area of Schwarzschild Black Hole w/Weyl Coordinates
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Undergrad Size Limit of Accelerated Rigid Body in Irrotational Born Rigid Motion
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High School Why is the speed of light a constant?
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Undergrad The Physicist & Philosopher: Einstein vs. Bergson Debate
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High School General Relativity, Twins & Schopenhauer: Analyzing Timing Diff.
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Undergrad Help Solve Twin Paradox Calc: A & B 1 Lyr Apart
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High School Potential Energy formula in Special Relativty
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Graduate Nonlocality Theorems & Relativity Principles
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High School Space is Relative: A 17 Yr Old's Exploration
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Undergrad Why Geodetic Equation Doesn't Accept Schwarzschild Solutions
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Undergrad Twin Paradox Explained: No Math Required
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High School Does Removing Planets Affect the Sun's Energy?
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High School Time, Space, Fields, Spacetime & General Relativity
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Undergrad Distinguishing gravity from fictitious forces
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Undergrad About inertial reference frames and logical deduction
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High School Gravity: How Does It Work & What Causes It?
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Undergrad Gravity: A Fun Look - Any Bloopers?
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Undergrad Can We Explain the Cosmological Constant as a Tensorial Concept?
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Undergrad Lorentz Transform Deduction: Question Explained
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Undergrad Why does time dilation only affect one of the twins?
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Graduate Help on some equations in Einstein's original papers
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Graduate Another action for the relativistic particle
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Graduate What Are Null Basis Vectors and Metric Signatures in Kruskal Coordinates?
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High School Why the stay-at-home twin is not considered to be accelerating?
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Undergrad What does comoving mean and how is it related to isotropy?
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Undergrad Derive Lorentz Transformation by Visualizing Space-Time Coordinates
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High School Gravitational Field Representation: Why 1-Plane?
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Undergrad GR for a mathematician and a physicist? What's the difference?
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Undergrad Does de Sitter Spacetime Have Flat Foliation?
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Undergrad Einstein vs Newton: The concept of inertial vs non inertial frames
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Graduate Thought Exp: Transform Laws & Feedback Needed
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High School Black Holes & Light: Questions from an Average Joe
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Undergrad Create Black Holes with Warping EM Fields: Feasible?
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Undergrad Detonator Paradox" Re-Cast: Can a Thin Wire Prevent a Bomb?
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High School General Relativity & External Forces: 2 Cases Examined
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Undergrad Solve Constant Acceleration Problem in Special Relativity
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High School Is the Doppler Effect Formula Different for Sources in Different Regions?
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Undergrad How Do Jacobi Fields Explain Tidal Forces in General Relativity?
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Undergrad Argument for Existence of Normal Coordinates at a Point
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High School Leave the science to Scientists. Just tell me what is SR.
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Undergrad Is a Merry Go Round Floating in Space an Inertial Frame of Reference?
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Undergrad Mass Unit in General Relativity
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High School Time dilation and the reference frame of the vacuum
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Graduate Curved spaces that locally aren't flat
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Undergrad Dark energy questioning Relativity?
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Undergrad Metric Tensor: Symmetry & Other Constraints
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High School Topology on flat space when a manifold is locally homeomorphic to it
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Undergrad Effective Potential & Curved Spacetime: Angular Momentum Effects
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High School Is There a Connection Between Planck Length and Planck Time in Relativity?
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Graduate How to Read Geodesic Equation: Vector, 3-D & EFE Solutions
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High School Can an Object Exceed the Speed of Light?
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High School Symmetry in Higher Dimensions: Sean Carroll's Video & Physics
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High School Does time dilation work in 1d space?
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Undergrad Questions about spaghettification and gas cloud G2
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High School How Does Gravity Affect Spring Stretching in Einstein's Theory?
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Graduate Gravitational Energy: Field x Moment
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Undergrad What is the nature of space and time in deep empty regions of the cosmos?
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High School Time Dilation b/w Galaxies: Dark Matter Impact?
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Undergrad Computing Riemann Tensor: 18 Predicted Non-Trivial Terms
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Graduate Double Dual of Vector Space: Is V** Always Same as V?
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High School Difference Between Redshifts of Massive Galaxies & Accelerating Galaxies
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Undergrad Length Contraction: Traveling in a Space Ship
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High School Components of Tangent Space Vector on Parametrized Curve
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High School Time traveling in the future and in the past
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High School On the level of detail required for GR math
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Graduate GR Unphysical Aspects: Time Protection Hypothesis & Riemannian Curvature
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High School Gravitational Mass of C/2 Objects: Jim Adrian's Inquiry
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High School Explore Time Perception & Relativity - Get Your Answers Here
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Undergrad Vanishing of Contraction with Metric Tensor
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High School How Do Lorentz Transformations Explain Time Dilation in Special Relativity?
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Graduate Unlearning Block Universe: BU vs Presentism Q&A
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Undergrad Static Point in de Sitter-Schwarzschild Spacetime
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Undergrad Metric defined with a non-coordinate basis
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High School Can time pass slower on another planet, causing the Twin Paradox?
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High School Backwards Time Travel: Can We Influence Our Casual Past?
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Undergrad Gravitational Wave Creation: Is a Stationary Wave Possible?
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High School Calculating Relativity of Simultaneity
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Undergrad The Non Constant Gravitational Constant (G)?
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Graduate Kerr Black Hole Angular Momentum Limit
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High School Time Dilation & Relativity: Explained for Beginners
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Undergrad Proper Velocity: Intro to Elementary Particles
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