Special and General Relativity Forum

Undergrad Everything attracts everything else; F = GMm/r^2. If two objects are

Graduate Observing a Galaxy in a New Way: 100,000 Lightyears Across

Graduate Gravity waves, how big are they?

Graduate Do all four-vectors live in a tangent space?

Undergrad Time Dilation Vs. Length Contraction

Graduate What would happen if the speed of light was 1000 times greater?

Undergrad Formula for light deflection in elevator

Graduate Why is Synge's world function needed if geodesic length is well-defined?

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Graduate Causality Violation in Extended Newton's Cradle?

Graduate Definition of Frame of Reference

Graduate Can Spaceship A Destroy Spaceship B at 99.99% the Speed of Light?

Graduate How to derive t1 in terms of t and t in terms of t1

Graduate How are vectors defined using partial derivatives in general relativity?

Graduate Rotation speed near light speed increasing gravity?

Undergrad Is this a truth and its evidence?

Graduate Asymmetric stress tensor gives asymmetric stress-energy tensor?

Graduate Who came up with the Light Clock Thought Experiment

Graduate Time dilation when falling into a black hole

Graduate Does time dialation cause mass reduction in GR?

Graduate My Particularly Troublesome Version of the EPR Paradox

Graduate Fluid Tensors and the Cosmological Constant

Graduate Four-Dimensional Vector in Special Relativity

Graduate Generalizing the special principle of relativity?

Graduate Why Do We Use Light Signals to Measure Time?

Graduate Can Torsion Exist in Two Dimensions from a Differential Geometry Perspective?

Undergrad Is time relative to space or space to time?

Graduate 'Symmetrisation Notation' - What is it?

Graduate How massive does a planet have to be to cut time in half?

Graduate Does rotating a photon clock 90 degrees eliminate time dilation?

Graduate Foundations of General Relativity Text - Recommendations

Graduate Could Gravity Transport Energy?

Graduate Does the twin paradox work the same on a different planet?

Graduate Why don't objects in orbit fall into the center?

Graduate Time dialation in different parts of a fast moving rocket

Undergrad Is time still affected (slowed down) at the center of the earth?

Graduate Time dilation by homogeneous distribution of massive objects?

Graduate How gravitational forces are represented by Christoffel symbols in GR

Graduate Observer Frame of Reference

Undergrad How does spacetime work and is it a graph?

Graduate Understanding Proper Length in Special Relativity

Graduate Upper limit on the characteristics of Singularity

High School Why does time dilation differ from just observing a stationary clock image?

Graduate Do gravitational waves travel slower than c in matter?

Graduate Trying to understand relativity

Graduate Can You Travel Faster Than The Speed Of Light?

Graduate Minkowski Inner Product and General Tensor/Matrix Question

Graduate Time Dialation and Biological systems

Graduate Can you find curvature of time from spatial curvature measurements?

Undergrad Is Gravity a force, or not a force?

Graduate A Relativity-Related Thought Experiment that has Given me Trouble

Undergrad Predictions we can derive if light were corpuscular

Graduate Is Light's Medium the Luminiferous Aether or the Electromagnetic Field?

Graduate Does relativity restrict velocity relative to an observer?

Graduate How did Lorentz come up with his ether theory?

Undergrad Can matter made of different stuff in the past travel backwards in time?

Graduate How did Einstein balance spacetime dimensions in E=mc²?

Graduate Is the Constancy of Light in Vacuum a Proof or a Postulate?

Graduate Physical Effects of ball moving at 0.9c

Graduate Why are mass, length, and energy relative?

Undergrad Relativity of simultaneity and doppler effect

Graduate How Does Hartle Derive the Equation from Arc Length to a Trigonometric Integral?

Graduate Lorentz covariance and Noether's theorem

Graduate If you could travel faster than light

Graduate Interpretation of Einstein's E=mc2 paper

Graduate Does the (0,0) component of the Ricci tensor equal Poisson's equation?

Graduate Do Free-Falling Charges in a Static Gravitational Field Radiate?

Graduate Evaluating metric tensor components at a specific point

Graduate Why do blackholes cut off from the rest of the universe

Graduate What does O(1,3) mean for the Lorentz group?

Graduate Does light experience time and space simultaneously?

Graduate Understanding Relativity: The Constant Speed of Light Phenomenon

Graduate Measured lightspeed in general relativity and moving through space.

Graduate Questions concerning Cosmological Constant

Graduate Understanding Lorentz Transformation of Spin 4-Vector

Graduate Simplifying the functional derivative δg_μν/δg^κλ

Undergrad Light speed; time dialation theory and its age

Graduate Resources on differential geometry in complex spaces and complex-valued general relativity

Graduate Effect of CMB (cosmic microwave background) on objects at relativistic speeds

Graduate Four force giving me headaches

Graduate Geodesic Equations: Newtonian vs Einstein

High School Where can I find easy-to-understand books about relativity?

Graduate How is the universe exactly 13.7 billion years old, in absence of absolute time?

Graduate Taub-Nut or NUT metric, that is the question

Graduate Understanding Relativity and Time Dilation in Space Travel

Graduate Schwarzschild metric transformation to flat coordinates and acceleration at constant r

Graduate What is the force behind matter's ability to curve space-time?

Graduate Superluminal Neutrino Breaks SR and GR ?

Graduate A Question on Relativistic Mass (SR)

Graduate Does the bending of light by gravity imply that photons have mass?

Graduate Gauss-Bonnet term extrinsic curvature

Graduate Relativistic Coulomb potential - how to understand the equation

Graduate Solving Einstein Notation: Summing Subscripts and Superscripts

Graduate I don't understand the nature of gravity

Graduate Are isotropic observers always at rest in surfaces of homogeneity?

Graduate Why are there different forms of the Einstein field equations?

Graduate Linearity of Maxwell's equations as a result of special relativity.

Graduate General relativity for a master degree?

Graduate Converting mass entirely into energy