Special and General Relativity Forum

Graduate Doppler Effect and Conservation of Energy

Graduate Topology of Relativity: Implications of Niels Bohr's Arguments

Graduate The (non-?) flatness of a uniform gravitational field and the equivalence principle

Undergrad Can Time Be a Dimension If It's Just a Human Construct?

Graduate Non-rotational and rotational metric tensors

Graduate Schwarzschild Spacetime: Ellipsoidal for Moving Observers?

Graduate Time Dilation Effect on High-Speed Object Orbiting Massive Object

Graduate STR removes the possibility of a common present

Undergrad Speed of Light: What Frame of Reference?

Graduate How Does the Observer's Perspective Resolve the Twin Paradox?

Graduate Has a real clock corrections, with respect to an ideal clock?

Graduate Math Applying Einstein's Theory of General Relativity

Graduate Observing Kerr Singularity: What Would an Observer See?

Graduate Mathematical Considerations of Spacetime in Classical Mechanics

Graduate Does light clock calibration affect the relativity result?

Undergrad Time Dilation: Do Astronauts See Events on Earth Slower?

Graduate What Happens During Accretion to a Primordial Black Hole?

Graduate If you're traveling at the speed of light, then time stops

Graduate Is the Relativity of Simultaneity Always True?

High School Does space move? What is space?

Undergrad Is All Motion Truly Relative to Space?

Undergrad Around the Earth Clock: Does Special Relativity Hold True?

Graduate Gravitational Effects of Gyros Near a Massive Object

Graduate Length contraction in diagonal motion and something strange?

Graduate So, what exactly do we mean by flat space?

Graduate Notational clash in index notation?

Graduate Maximum angular momentum for charged black hole?

Graduate What would GRT look like if negative masses existed?

Graduate How do vectors and covectors transform under coordinate translation?

Graduate What happens when primordial black holes settle inside stars or planets?

Graduate Following the derivation between equations 2 and 3 in cosmology

Graduate Mapping Space with Clocks: Deduce Distances/Observers w/ Constant Light Speed

Graduate Length contraction and time dilation in spacetime

Graduate MTW Ch7: Choosing Lagrangian for Scalar Potential

Graduate Existence of affine parameters of null geodesics

Graduate Why does velocity from constant proper acceleration seem Lorentz invariant?

Graduate What is the role of tensor calculus in general relativity?

Graduate Does relativistic length contraction of a crystal create a piezoelectric effect?

Undergrad Why subtract spatial distance when calculating spacetime intervals

Graduate Does onboard proper time give distance divided by proper time faster than light?

Graduate Partial derivative with respect to metric tensor

Undergrad Is there mass if there is no gravity?

Graduate Is Quantum Space-Time a Real Possibility?

Graduate Why does relativistic momentum have an extra factor of u?

Graduate Could Lorentz Violations Occur in Vacuum Deep Inside Celestial Bodies?

Graduate Measuring Light Frequency: Does Newton's Law Apply?

Graduate Why no absolute derivative in this example of geodesic deviation?

Graduate How Does Relativity Affect Time Measurement in Thought Experiments?

Graduate How fast would we age if all motion in the universe stopped?

Graduate Can light exist without space time?

Undergrad Not a scientist, just wondering -- Shining a laser pointer into space

Graduate Does the Sagnac Effect Indicate Rotation in Non-Rotating Gyroscope Frames?

Graduate Black Hole Hawking Radiation: Frame-Dependent Virtual Particles

Graduate How Can a Photon Oscillate with a Frequency If Time Stops at Light Speed?

Graduate Space-Time Projection on Space

Graduate Help with Exercise 7.1 - MTW Chapter 6

Graduate Is spacetime a physical reality or just a mathematical model?

Graduate Can You See Your Reflection While Traveling at Light Speed?

Graduate Speed of light and planck length

Graduate Variation of the Christoffel Symbols

Graduate Is there a minimum speed in the universe besides the maximum speed of light?

Graduate Why can't Poincaré transformations depend on the proper time parameter?

Graduate Stress and pressure as gravitational source

Graduate Time Dilation, Twin paradox etc.

Graduate Why does the Minkowski metric have negative signs for spatial components?

Graduate Newtonian and GR Friedman equation

Graduate How does one get time dilation, length contraction, and E=mc^2 from spacetime metric?

Graduate How do you derive relativistic tensors in an orthonormal basis?

Graduate Formula for geodesics around a mass in 2D projection

Graduate Time dilation on the surface of a planet and escape velocity time dilation

High School How can I explain E=mc² to a 12-year-old?

Graduate Perception of faster than light travel?

Graduate Do all elements of the stress energy tensor really have the same units?

Graduate Deriving the Expression for Total Energy: Understanding E = gamma mc^2

Graduate Doppler Shift of Light: Visible-to-UV Properties?

Graduate Can't Tell If you are shrinking?

Graduate Why don't we see matter piling up at the event horizon?

Graduate Can Space Curve Faster Than Light?

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Undergrad Will Distance Between Footsteps Change When Walking Near Light Speed?

Graduate Do observers in different frames measure the same distance to a spherical EM wavefront?

Graduate Null Hypersurface: Building a Tangent Surface in 2 Dimensions

Graduate What Are Tension Shells and Tension Stars in Israel Formalism?

Graduate Special Relativity as a source of Power?

Graduate Energy Momentum Tensor - General Properties

High School How Does Gravity Affect Rocket Launches from Different Points on Earth?

Graduate EM Wave Equation in Higher Dimensions: Gravitation Text

Graduate Can I Prevent Black Hole Formation?

Graduate An apparent paradox with couple of frames

Graduate Deriving the Schwarzchild radius?

Graduate Gyrostatic aether equations from McCullach and Kelvin

Graduate Does Antisymmetrization in Wedge Product Skip Basis Effects?

Graduate Why Do We Discuss Light Cones and Black Holes If There's No Light Present?

Graduate Time Travel: Does General Relativity Allow It?

Graduate Why use an auxiliary field in the relativistic particle action

Graduate Why Can't We Do Algebraic Methods with Tensors?

Undergrad Does Light Have Mass? Astrophysics Discussion

Graduate Derivations of Einstein field equations

Graduate Does Einstein's synchronization scheme have hidden assumptions in SRT?

Graduate Question concerning speed of light in reference frames

Graduate Does object gain mass when spinning?