Special and General Relativity Forum

Graduate What is the 4-velocity of an object?

Graduate Most power gravitational wave sources

Graduate Mass-Beam Behaviour: An Analysis of Efficiency for Particle-Beam Pushed Sails

Undergrad Understanding Relativity: An Introduction for A-Level Students

Undergrad Question about Galileo's principle of relativity

Graduate Solutions to Killing's equation in flat spacetime

Undergrad E=MC2 vs. m² = E² - p²: Motion vs Rest

Graduate Derivation of Energy-Momentum Relation WITHOUT using relativistic mass?

Undergrad Special relativity Only Valid Under Handpicked Conditions?

Graduate The Stress part of the Stress - Energy - Momentum Tensor

Graduate ED Griffiths "World Line" Problem: Solution to p.506, prob. 12.22

Graduate How Does Time and Space Switch Roles at a Black Hole's Event Horizon?

Graduate Functional derivative of connection with respect to metric

Undergrad Can Time Travel Really Alter Our Perception of Communication?

Undergrad Is the presence of 'c' in E=mc^2 coincidence?

Graduate How much matter can you put in space and time?

Graduate Am I taking crazy pills or is Einstein missing a factor of gamma?

Undergrad General Relativity- the Sun revolves around the Earth?

Graduate What is the true meaning of rest-energy in relativity?

Graduate Coordinate transformation and metric tensor

Undergrad Coordinate Systems: GR vs Newtonian

Graduate What Makes Gravity Seem So Weak Compared to Other Forces?

Graduate How Can Gravity Be Calculated in an Alderson Disk System?

Undergrad Question about Black Holes and Speed

Graduate Where does the Einstein-Hilbert action come from?

Graduate Velocity addition expressed as gamma

Undergrad Can Energy be Converted into Mass?

Graduate Time Dilation Light Clock Example

Graduate Deriving Relativistic Momentum

Graduate What Determines the Sources of Gravity in Einstein's Theory?

Graduate How Does Dark Energy Exhibit Negative Pressure in Cosmology?

Graduate Gravitational Analog to Maxwell's Eq.

Graduate How Can We Understand Geodesics in Curved Spacetime Under Gravity?

Graduate Understanding Contortion Tensor in Teleparallel Gravity

Graduate Has Special Relativity really been proven?

Graduate Timelike geodesic equations for the Schwarzschild metric

Undergrad Does Relative Speed Affect Gravitational Attraction?

Undergrad Can you accelerate faster than the speed of light?

Graduate What Prevents the Time Dilation Paradox in Intergalactic Travel?

Graduate The strange world of Phil the photon

Graduate Device to measure curvature of spacetime.

Graduate Is it Possible to Travel Faster Than Light?

Graduate Can someone please explain to me what the Christoffel symbols symbols are?

Graduate Relativity: Changes & Extensions - 3 Questions Answered

Graduate Relativity of simultaneity help

Graduate Understanding Relativity Concepts in Interstellar Space

Graduate How Clocks (Seemingly) Ruin Everything

Graduate Quantitative Predictions from Higher Math? Relativity, Quantum Field, String

Graduate Time dimension extent of a 4-dimension object

Graduate What is the equation for stable orbits in Kerr metric?

Undergrad Curvature in space time ? Gravity

Graduate Preserving Magnetic Polarity in a Revolving Reference Frame

Graduate Acceleration vs Gravity and effect on time/clocks

Graduate If I was traveling at 51% the speed of light

Graduate Negative moving coordinates and Time Dilation

High School Gravity on a Moving Train: More or Less?

Graduate Are Relativistic Mass Calculations Still Relevant in Modern Physics?

Graduate The WHY of speed of light vs. the FACT thereof

Graduate Does gravity REALLY pull on light? Really?

Graduate Is Flat-Earth's Gravity Theory Flawed Due to Relativistic Acceleration?

Graduate Both think the other's time is slower Paradox

Graduate Understanding accelerated frame in general relativity

Graduate Space Travel: SR Questions Explored

Graduate Contradiction in Relativistic Simultaneity in Taylor-Wheeler Spacetime Physics?

Undergrad The world revolves around a person

Undergrad What is the best frame of reference?

Undergrad Does light really travel in same frame of reference

Graduate The Big Bang singularity - does it have infinite energy?

Graduate Mass of Earth/Sun: Comparing in Different Frames

Graduate Help Needed: Understanding Equation No. 3 in an Article

Graduate Black Hole time dilation + biological paradox

Graduate On the Electrodynamics of Moving Bodies

High School Time Dilation: Explaining the Basics for a Sci-Fi Story

Graduate Solve Problems in General Relativity: Books & Websites

Graduate What Are Some Physically Relevant Higher-Order Lagrangian Systems?

Graduate Solving for g_φφ=0 in charged/rotating BHs

Graduate Do Black Holes Grow? Investigating the Lifecycle of a Galaxy

Graduate Evidence for preferred frames?

Graduate GR: "Proper Distance" Meaning and Usage

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Graduate What happens in this scenario? (Poll)

High School Confused about moveing through time

Graduate Some help understanding the metric tensor

Undergrad Impossibility of Backwards Time Travel

Graduate Are there any energy change of photon in different frame?

Graduate Is Faster Than Light Travel Possible Through Kinetic Energy?

Graduate Question about Big Bang and Black Holes

Undergrad Near Light Speed Travel & Time Dilation I don't get it.

Graduate Is light bound to travel at C?

Graduate Vector Addition in Curved Space: Invariance?

Graduate Time dilation formula for constant acceleration on a circular path

Graduate Gravity as an emergent phenomenon

Graduate Two dimensional anti de Sitter space without cosmological constant?

Graduate Random General Relativity conceptual questions

Graduate Tolman versus Recami: tachyons

Graduate Actual earth measurement contradicts measurement predicted by special relativity

Undergrad Gravitational Field Strength and Acceleration on Mars

Graduate What Is the Best Way to Understand General Relativity?

Graduate Is a Galilean Universe Truly Separate from Space-Time Concepts?