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.
Threads
Undergrad Evidence of length contraction
- Adam
- · Replies 7 ·
Graduate Do Wormholes Require Antimatter Singularities to Function?
- chosenone
- · Replies 19 ·
Graduate Bee Swarm Relativity: Calculating Time with a Messenger Bee
- Vern
- · Replies 2 ·
Graduate Spaceship accelerating inside a Black Hole
- quasar987
- · Replies 7 ·
Graduate Time Before Time: Physics Paper Clarifications
- Olias
- · Replies 2 ·
High School Older faster if the universe wouldn't be expanding?
- niko2000
- · Replies 4 ·
Graduate There is only one True Singularity and It is at the Center
- Ray Eston Smith Jr
- · Replies 43 ·
Graduate What is a time-like killing vector?
- kurious
- · Replies 4 ·
Graduate What is the Unverifiable Nature of Black Hole Internal States?
- blue_sky
- · Replies 6 ·
Graduate Why does gravity rotate with the Earth?
- Gfoxboy
- · Replies 8 ·
Graduate Change in relativistic momentum
- kurious
- · Replies 5 ·
Undergrad Question about how we look at space
- dcbobo
- · Replies 33 ·
Undergrad Gravitation Speed/Acceleration/Velocity
- Olias
- · Replies 7 ·
Graduate Is Action at a Distance Compatible with Quantum Mechanics and Relativity?
- wolram
- · Replies 4 ·
Graduate What software do people use for tensor manipulation in general relativity?
- pervect
- · Replies 2 ·
Graduate E = mc^2: Identity or equality
- pmb_phy
- · Replies 2 ·
Graduate Is gravity really just acceleration? And what about gravitons?
- mee
- · Replies 2 ·
Graduate Where are we on gravitational waves/graviton?
- quasar987
- · Replies 6 ·
Graduate Calculating mass and speed from kinetic energy and linear momentum
- niko2000
- · Replies 12 ·
Undergrad Does Gravity Expand and Collapse or is it Always Present?
- Zeteg
- · Replies 3 ·
Graduate Special Relativity. timespace correlation.
- mlip
- · Replies 10 ·
Undergrad Is Einstein's Theory of Relativity Flawed?
- A 15 year old
- · Replies 76 ·
Graduate Can particles traveling near the speed of light create a time reversal effect?
- John_M
- · Replies 28 ·
Graduate How Does Dark Energy Exert Pressure in the Universe?
- kurious
- · Replies 5 ·
Graduate Event Horizon vs Singularity: Are They the Same Thing in Black Hole Physics?
- Ray Eston Smith Jr
- · Replies 2 ·
Graduate What Determines the Direction of Space Curvature by Mass in General Relativity?
- Erus
- · Replies 6 ·
Graduate Time flow & Cosmic Background Radiation
- J79
- · Replies 12 ·
Graduate Question about expanding black holes
- Ray Eston Smith Jr
- · Replies 7 ·
Graduate Can two events be perceived in reverse order due to relativistic effects?
- Gerinski
- · Replies 7 ·
Graduate Escape velocity outside event horizon
- Ray Eston Smith Jr
- · Replies 6 ·
Graduate Can a falling feather inside a rocket ship create a black hole?
- Ray Eston Smith Jr
- · Replies 6 ·
Undergrad Why Doesn't a Photon's Energy Knock Us Out?
- CBR600RR
- · Replies 35 ·
Graduate Conservation of energy in GR and symmetry
- kurious
- · Replies 12 ·
Graduate Can an Accelerating Universe Rotate According to GR Principles?
- blue_sky
- · Replies 14 ·
Graduate Into the past ?: Tricky SpaceTime Diagrams?
- Gerinski
- · Replies 7 ·
Graduate Is This Explanation of Black Holes Accurate According to Mainstream Theory?
- Ray Eston Smith Jr
- · Replies 9 ·
Graduate Those who use relativistic mass and why
- pmb_phy
- · Replies 89 ·
Graduate Are There Any Alternative Models to Explain Gravity?
- Tom McCurdy
- · Replies 2 ·
Graduate Stresses in a rotating object?
- billyboy
- · Replies 2 ·
Graduate Measuring the Speed of Light from Distant Sources: How Do We Know It's Constant?
- Prometheus
- · Replies 4 ·
Graduate Matter Forms Space & Time is Relative Motion
- what_are_electrons
- · Replies 2 ·
Graduate So we have problems with clocks measureing time ?
- Doctordick
- · Replies 215 ·
Undergrad How can we explain special relativity to skeptics?
- VantagePoint72
- · Replies 13 ·
Undergrad Solving the Twins Paradox: Could Einstein be Wrong?
- Gfoxboy
- · Replies 8 ·
Graduate Can an Arbitrary Co-ordinate System Be Used for Observers in GR?
- blue_sky
- · Replies 12 ·
Graduate The fundenental law of relativity
- C. Michael Turner
- · Replies 21 ·
Graduate Oh My God Particle - Fourmilab
- whydoyouwanttoknow
- · Replies 2 ·
Undergrad Is Time Travel Backwards Theoretically Possible?
- ArmoSkater87
- · Replies 7 ·
Graduate Solving a Random Equation: a=dt_o/t^3sqrt(1-v^2/c^2)
- IooqXpooI
- · Replies 4 ·
Graduate Infinitie tidal forces at event horizon?
- Ray Eston Smith Jr
- · Replies 3 ·
Graduate What Are the Key Properties of Tensor Equations in General Relativity?
- da_willem
- · Replies 12 ·
Graduate Can Special Relativity's Equations Be Modified to Avoid Infinities and Zeroes?
- kurious
- · Replies 25 ·
Graduate Calculating Relative Speed in 2D: Solving for Gamma with Two Spaceships
- niko2000
- · Replies 11 ·
Graduate Relativity Question: Two spaceships following each other near C
- relativitydude
- · Replies 5 ·
What Would Sound Like at the Speed of Light?
- NiceJerkGuy
- · Replies 5 ·
Graduate Spacetime and Euclidean Geometry-Jacobson
- Olias
- · Replies 2 ·
Graduate Speed light travels on earth and in our solar system
- Hat_Man
- · Replies 2 ·
Graduate Question about the metric tensor in Einstein's field equations.
- Entropy
- · Replies 3 ·
Graduate Practical Use For Length Contraction?
- zoobyshoe
- · Replies 13 ·
Graduate Can Humans See Bodies Traveling at the Speed of Light?
- Sana
- · Replies 26 ·
Graduate Latest Developments on Black and White Hole-Theory and Anti-Gravity
- marlon
- · Replies 10 ·
Graduate Matter <--> Energy Conversions: A Phase Transition?
- Glenn
- · Replies 4 ·
Graduate Can Matter and Energy Truly Be Annihilated According to Relativity?
- Erus
- · Replies 7 ·
Graduate Do Gravitons Play a Role in Simulated Gravity on a Rotating Spacestation?
- Glenn
- · Replies 3 ·
Graduate Do Einstein's Theories of Relativity Contradict Each Other?
- Garth
- · Replies 70 ·
Graduate What is the nature of mass and its relationship to movement?
- Vern
- · Replies 33 ·
Graduate Does relativistic mass have a gravitational component?
- j8hart
- · Replies 60 ·
Graduate Is Time a Mobius Dimension in Relativity Theory?
- Neo
- · Replies 8 ·
Graduate The Pinwheel Paradox: What's the Solution?
- Zanket
- · Replies 19 ·
Graduate Shape of the Universe: Conditions for Viable Theory
- Gale
- · Replies 17 ·
Graduate Theories of Relativity: Analogon
- Neo
- · Replies 5 ·
Undergrad How Does Water Slow Down Light Without Violating Special Relativity?
- Jake
- · Replies 2 ·
Graduate GR: A First Course in General Relativity
- Gza
- · Replies 22 ·
Graduate Does G.Relativity Violate Energy Basics?
- omin
- · Replies 27 ·
Graduate Explaining C: How Space Changes with Speed
- Reflector
- · Replies 105 ·
Graduate Correction to length contraction equation
- kurious
- · Replies 35 ·
Graduate Train Experiment: Does Simultaneity Depend on Frame of Reference?
- John_M
- · Replies 11 ·
Graduate How Does Einstein's Theory Explain the Nature of Space?
- omin
- · Replies 22 ·
Graduate Is a change in earth's surface gravity detectable?
- Creator
- · Replies 9 ·
Graduate GR Questions: Light & Gravity Effects
- woodysooner
- · Replies 28 ·
Graduate What is the Entropy Value of a 5 Solar Mass Black Hole?
- kurious
- · Replies 2 ·
High School The difference b/t free fall and outer space
- HungryChemist
- · Replies 2 ·
Graduate Length Contraction and the Bomb Paradox
- HungryChemist
- · Replies 7 ·
Graduate What is the Speed of Light, Dark Matter?
- jaguar99
- · Replies 2 ·
Graduate Energy Reference Frames: Consensus on Object Energy Across Different Observers?
- Moose352
- · Replies 40 ·
Graduate Angular Contraction: Wheel Rotation & Ruler
- Silverious
- · Replies 9 ·
Undergrad What Starter Texts Can Help Understand Differential Geometry for GTR?
- srp
- · Replies 6 ·
Graduate Exploring the Effects of Space Time Expansion on Unbound Bodies
- wolram
- · Replies 3 ·
Undergrad How fast is a relativistic velocity?
- whydoyouwanttoknow
- · Replies 6 ·
Graduate Speed of light and length contraction
- Brookey
- · Replies 4 ·
Graduate Definition of a clock in relativity theory
- kurious
- · Replies 3 ·
Graduate I'm holding a pole and running at a relativistic velocity
- whydoyouwanttoknow
- · Replies 2 ·
Graduate Light Around Black Holes: Can It Orbit?
- turin
- · Replies 2 ·
Graduate Anyone here look at Einsteins calculations?
- Goblin
- · Replies 13 ·
Graduate Einstein, Ziegler and Planck: 1909
- Vern
- · Replies 26 ·
Graduate NASA's Gravity Probe B: Testing Einstein's Theory of Relativity
- Orion1
- · Replies 5 ·
Will Hawking or Penrose ever win Nobel Prize?
- Nenad
- · Replies 3 ·
Undergrad Relativistic Doppler effect (for sound?)
- one_raven
- · Replies 3 ·
Undergrad Calculating Time Dilation: A Lorentz Transformation
- woodysooner
- · Replies 17 ·
Undergrad What Is the Difference Between Dark Matter and Dark Energy?
- marlon
- · Replies 11 ·