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 Energy-Momentum Tensor: How Much Do University Students Learn?
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Undergrad Can Lagrangian mechanics be applied to motion in an expanding universe
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Undergrad Why Stationary Masses Attract: Explaining GR Intuition
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Undergrad The Equivalence Principle as a Starting point of GR
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High School Relative Nature of Speed: Einstein and Orbits
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Undergrad How time dilation is a permanent change and length contraction not?
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Undergrad Time travel to the Andromeda Galaxy
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Undergrad Transformation of the Christoffel Symbols
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Undergrad Derivation of the conservation of total energy and momentum
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Undergrad Wiki definition of Fermi coordinates
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High School How Can Photons Contribute Mass to a Container?
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High School Does Gravitational Time Dilation Affect How We Measure Time on Earth?
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Undergrad What is the ambiguity surrounding coordinate differentials in Relativity?
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Undergrad Special relativity vs Lorentz invariance
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Undergrad Parallel Transport: Uses & Benefits
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Graduate Cooling of Identical Bodies in SR: A Peculiar Situation
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Undergrad Time Dilation: Relative to Medium or Vacuum?
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Undergrad Metric compatibility and covariant derivative
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Undergrad Derivation of an identity for ##\partial^2_t \int T^{00}(x^i x_i)^2d^3
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Insights Relativistic Treatment of the DC Conducting Straight Wire
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Undergrad Aberration of Light in Circular Motion: Does Distance Change?
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High School Schwarzschild radius of an object is smaller than Planck length
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Undergrad The solution of a nonlinear equation in Schutz's book page 211 2nd edition
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Undergrad ADM Formalism: Intro-to-Intermediate Explanation
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Undergrad Time Dilation, Mass-Energy Equivalence: Implications for Time Passage
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Undergrad Speed of Light Paradox: Neutron Star Rotation Rate
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High School The Strong Energy Condition in General Relativity
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Undergrad Observing a rotating body when approaching it at near light speed
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Undergrad Coordinate time between spatially separated events in Schwarzschild spacetime
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High School Why does matter always escape while antimatter falls into black holes?
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Undergrad Max Time Travel Date: Can We Enjoy Moments From the Past?
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Graduate Theoretical status of hypothesized Generic Objects of Dark Energy
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Undergrad Inertial Mass as Speedometer: Physics & Universe
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Undergrad How big are the non-mass parts of the stress-energy tensor?
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High School GR & Early Universe: Time Dilation & Light Speed
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Graduate Einstein Tensor and Stress Energy Tensor of Scalar Field
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Undergrad The Shape of Space: How Does It Move?
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Undergrad Get Standard Units Flux Multiply c^2: Perfect Fluid/Einstein's Dust
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Undergrad Invariants of the stress energy tensor
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Undergrad QFT of Gravitons in Minkowski Space vs GR
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Undergrad Light Speed Mirror Reflection: Can You See Yourself?
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High School Are Gravity and Magnetism Curving Space in Similar Ways?
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Undergrad Derivation of Riemann tensor's first order-equation
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Undergrad Covariant Derivative: 2nd Diff - My Question
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High School Relative Dead Stop in Deep Space
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Undergrad Godel metric in a cylindrical chart
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Undergrad Special Relativity: 2-D Collisions for Alice & Bob
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Undergrad Two rings rotating about a common center
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Undergrad Accel. in Spec. Relativity in 2-Dims: Point Test Mass
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High School Light & Gravity: Impact on Spacetime?
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Graduate Einstein and Spacetime: Debunking the Myth of Rejecting Curvature
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Undergrad Length Contraction & FTL Speeds: Are Lower Grades Faster?
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Undergrad Understanding Light from Black Holes
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Undergrad Lorentz transformation for 3 frames
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Undergrad How to See How Two Frames are Connected?
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Undergrad Playing music with Gravitational waves
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Undergrad Lie derivative of hypersurface basis vectors along geodesic congruence
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Undergrad Light pulse path, length and shape, when bouncing between two mirrors
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High School Relationship between mass and energy
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Undergrad Find CTCs in Kerr Metric: Visualizing Spacetime Geometry
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Undergrad Lorentz transformation of derivative and vector field
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Undergrad Light Momentum - Does it Make Sense or Not?
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Graduate Alcubierre Warp Drive: Intro Paper for GR Students
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Undergrad A "space elevator" extended to Neptune's orbit
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Undergrad Why Does the Angle Between Coordinate Axes in Different Frames Equal atan(v/c)?
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Undergrad Position of Particle in Special Relativity (A vs B)
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High School Julius Caesar Problem from a SpaceTime Physics book
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Undergrad Can we increase an object's gravitational force by adding energy?
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Undergrad Pullback of Vector Field in Relativity: Restrictions?
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Graduate Derive Radial Momentum Eq. in Kerr Geometry
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Undergrad Appearance of a Kerr black hole from above
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High School What happens to speed and velocity in a rotating frame of reference?
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High School Reference frame symmetry in Special Relativity
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Undergrad Energy Momentum Tensor Prerequisites: What Do I Need to Know?
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Undergrad Mechanical system with de Broglie-like features
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Graduate Relativistic Hoop w/ Constant Circumference: Solving Egan's Results
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Undergrad Special relativity question driving me crazy....
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High School Where did the 1/2 go in E=mc^2?
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High School Is Gravity Really a Force Like the Other Fundamental Forces?
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High School Proof of Specific Covariant Divergence
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High School Special Theory of Relativity: Ques on Thought Experiment
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High School Question about the rest frame of a photon
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Graduate Applying General Lorentz Boost to Multipartite Quantum State
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Undergrad Is Relativity a Complete Theory? Investigating Math Formulation
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Undergrad Relativistic Energy of Rotating Thin Ring: Quick Qs
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Graduate Why does MTW keep calling the "product rule" the "chain rule"?
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Graduate Derivation of the Vacuum Einstein Equations: Understanding ln det g = 1
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Undergrad Problems with Einstein's 1920 "Relativity"
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Undergrad Is the Lorentz Boost Speed Nontrivially Related to Galilean Speed?
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High School But in reality, time isn't relative at all, right?
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Graduate Issue with the definition of a Lie derivative and its components (Carroll's GR)
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Undergrad How does gravity affect time on different planets?
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Undergrad Succeed in Learning Relativity: Transport, Frames, Tensors
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Undergrad How do you derive those basis vectors in GR?
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Undergrad Communication with Rindler Observer: Is It Possible?
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Undergrad Relativity of Simultaneity: What Einstein's Contribution Was
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Undergrad Okay, what exactly makes a timelike curve closed?
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Undergrad Three dimensional tracefree tensor?
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High School Universe Becoming a Black Hole: What Would It Look Like?
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Undergrad On the Relativity of Lengths and Times
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