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 Effects of Velocity Aberration?
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Undergrad Speed of Light: Does Intensity & Frequency Affect It?
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Undergrad What is the smallest practical unit of time?
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Undergrad Can Space Aircraft Reach Speed of Light in Vacuum?
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Undergrad What exactly is a hypersurface?
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Undergrad What is the 4th Dimension - 3D World + Time or 4 Axis?
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Undergrad Basis Vector in GR: Cartesian Plane Comparisons
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Undergrad Scalar Product of Orthonormal Basis: Equal to 1?
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Undergrad What if the Halo Ring from "Halo" turned into a blackhole?
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Undergrad Time Dilation & Mass: Does 2x Mass Mean 2x Slower Time?
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Undergrad Can the Rest Mass of an Object Change Over Time?
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Undergrad Is Freefall Really Not Accelerated Motion? Debunking Common Misconceptions
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Undergrad Bending Space: Unraveling the Mystery
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Undergrad Speed of Sound: Constant Irrespective of Source Speed
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Undergrad Can Galaxies Rotate Faster Than the Speed of Light?
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Undergrad Length contraction and direction of tavel
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Undergrad Massless Particle Questions: Explaining Photon's Lack of Mass
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Undergrad Relativity for Poets: A Free eBook
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Undergrad Can Gravity Cause an Object to Pull Itself Inward?
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Undergrad Lorentz Transformation negative result
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Undergrad Relative momentum and relative mass
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Undergrad Discover the Relationship Between E=mc2 and Time with m=1kg and d=1m
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Undergrad Time Dilation: 1 Hour=77 Hours - Can I Phone?
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Undergrad The Minimum Speed in the Universe: An Exploration of the Cosmic Limit
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Undergrad Some Interesting Problems (Reference Frame)
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Undergrad Explore Relativistic Effects in "A Slower Speed of Light" Game by MIT Game Lab
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Undergrad Minimum energy to accelerate a mass?
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Undergrad If the speed of light is constant in any inertial frame
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Undergrad Relative movement and agreement about an object's speed
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Undergrad Is Time Dilation Making Astronauts Younger in Space?
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Undergrad How Long Does a Photon Think It Takes to Travel from the Sun to Earth?
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Undergrad Gravity in General Relativity and Earth's Surface
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Undergrad Space-Time Singularity: What, How, and Is It Possible?
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Undergrad How Do Black Holes Acquire More Mass Than Other Objects?
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Undergrad How can (1/2)mv^2 and p^2/2m give different results?
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Undergrad Are time machines possible? (serious)
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Undergrad Algebra Question: Where Does the 2 Come From?
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Undergrad Time Dilation on Earth: Why Hemisphere Matters
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Undergrad Light Travel After Big Bang: Baseball Universe Impact
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Undergrad Is this quote from Steven Weinberg right?
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Undergrad Speed of light vs speed of sound
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Undergrad Gravity & Matter: What is the Connection?
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Undergrad Does the mass of a spinning object twist spacetime?
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Undergrad Why do objects rest on space thus causing gravity?
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Undergrad Lorentz Contraction: How Fast Can Objects Travel?
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Undergrad The "x'=x-vt" in Galilean/Lorentz transformation
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Undergrad Neutrons in electromagnetic fields
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Undergrad Special Relativity: Light & Time Travel Questions
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Undergrad Speed of Light: Stationary & Moving Observers
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Undergrad Light from Train Scenario: Student Question Explained
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Undergrad Force on High Moving Object in X Direction: Explained
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Undergrad Quick calculation check please
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Undergrad Relative Time: Earth vs Mars - A Physics Enthusiast's Question
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Undergrad What are the energy implications of time travel into the future?
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Undergrad Time Dilation Confusions - A Physics Newbie's Questions
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Undergrad Solving the Mystery of e=mc^2: Understanding the Power of Squared in Physics
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Undergrad Acceleration & Special Relativity: Explained
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Undergrad Relative velocity time dilation question
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Undergrad Does gravity affect a magnetic/electric field?
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Undergrad Why Is Gravity Different from Electromagnetic Radiation?
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Undergrad Relativity: Noob Ques. - Why Do People on Earth Seem Stationary?
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Undergrad What is the equation for the Schwarzschild Radius and why is π not included?
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Undergrad How many observers are needed to calculate the relativistic speed equation?
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Undergrad Get confused about time dilation
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Undergrad Einstein Mass-Energy Equation: Will Mass Change?
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Undergrad Accelaration & forces in different inertial referance frames
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Undergrad Understanding Cofactor & Adjugate Matrices
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Undergrad Einsteins thoughts behind c2 in E=mc2
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Undergrad Perception of time, relative and distant.
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Undergrad Einstein theory on bending of space
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Undergrad Learning to Simplify the Curvature Tensor
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Undergrad Big Bang Background Radiation: Questions Answered
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Undergrad Light Direction in Different Frames: Resnick & Halliday
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Undergrad Understanding Kronecker Delta: Why & How?
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Undergrad Is It Possible to Determine Motion in Relativity?
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Undergrad Black Holes: Questions from a Non-Scientist
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Undergrad The Twins Paradox: Understanding the Slow-Motion Effect
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Undergrad Special relativity and the speed of light constant
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Undergrad If photons have no mass,why would black holes attract light?
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Undergrad Time Dilation at Near Light Speed: Answers to a Thought Exercise
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Undergrad Gravity Waves: Frequency & Understanding Needed
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Undergrad Does Mass Really Change with Velocity Near the Speed of Light?
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Undergrad Ball Thrown Up: Constant Speed Despite Height
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Undergrad General Case of Relative Velocities
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Undergrad Does Gravity Affect Time Dilation on a Flat, Non-Rotating Earth?
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Undergrad Speed of Light: Does It Slow Down in a Gravity Field?
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Undergrad Questions about Gravitational Waves: Answers Here
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Undergrad E=MC^2 Explained: Photon Mass & Energy
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Undergrad Math & Relativity: Understand Einstein's Theories
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Undergrad Length Contraction in Special Relativity
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Undergrad Time dilation - effect on clock or 'time' itself?
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Undergrad EMF Generated When Magnet Moves Linearly Across Its Field
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Undergrad Differences Between Doppler Effect Formulas: u & f´
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Undergrad Can time dilation cause confusion in the twin paradox?
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Undergrad Time Dilation: Doubts & Questions Answered
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Undergrad Velocity & Mass: Does Speed Increase Gravity?
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Undergrad Length contracting between objects
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Undergrad Time dilation -- light clock on a train thought experiment
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Undergrad Why Can't Objects Accelerate to Light Speed?
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Undergrad Speed of Light & Red Shift: My Understanding
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