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
Graduate Steven Bryant's complete and incomplete coordinate systems model
- deckart
- · Replies 16 ·
Graduate Twin paradox and accelerated observers in special relativity
- nrqed
- · Replies 7 ·
Undergrad Could Time Travel Create Extra Matter and Energy in the Universe?
- kuahji
- · Replies 5 ·
Graduate Explain to me how a sphere can exist in higher dimensions?
- Quantum1332
- · Replies 2 ·
Undergrad How does the twins paradox work and can you travel back in time?
- ekinnike
- · Replies 2 ·
Graduate Understanding Accelerated Motion in Relativity
- Ratzinger
- · Replies 12 ·
Graduate Can SR be derived from other postulates than the constancy of c
- lalbatros
- · Replies 6 ·
Graduate Conservation laws and relativistic dynamics
- bernhard.rothenstein
- · Replies 12 ·
Graduate How Does Time Dilation Affect Thermal Equilibrium in Gravitational Fields?
- Longstreet
- · Replies 6 ·
Graduate Curvature without tidal forces
- Ratzinger
- · Replies 4 ·
Graduate Twin Paradox: Earth-Twin vs Space-Twin Aging
- bino
- · Replies 3 ·
Graduate Optimal speed to minimize travel time in relativity
- supernova83
- · Replies 16 ·
Graduate What Are Your Thoughts on Dual Meanings in Physics Terminology?
- pmb_phy
- · Replies 11 ·
Undergrad Light Barrier: Breaking the Speed of Light?
- waznboyd
- · Replies 3 ·
Graduate Is K in Bondi K Calculus Constant Due to Homogeneity and Isotropy of Spacetime?
- JUboy
- · Replies 1 ·
Graduate Why is photon rest mass zero if light can't be slowed?
- row
- · Replies 44 ·
Graduate Why aren't velocity and momentum equations true in all reference frames?
- blumfeld0
- · Replies 6 ·
Graduate Why doesn't the electric field energy of a charged black hole increase its mass?
- JustinLevy
- · Replies 2 ·
Graduate Why is there a k in Bondi k calculus?
- JUboy
- · Replies 17 ·
Graduate Can Photons from a Laser Distort Space-Time Like Massive Objects?
- Teleros
- · Replies 4 ·
Undergrad Does a traveling twin really age less in the twin paradox?
- UglyEd
- · Replies 22 ·
Graduate How Do Killing Vectors Affect Geodesic Deviation?
- Nikos
- · Replies 4 ·
Graduate When the photon is born on the horizon .bang?
- Giulio B.
- · Replies 2 ·
Graduate Invariant mass of particles bouncing between moving plates
- pervect
- · Replies 7 ·
Graduate What Is the Orbital Period for Circular Orbits Around Black Holes?
- pervect
- · Replies 7 ·
Undergrad Potential energy contributes to the mass
- bernhard.rothenstein
- · Replies 5 ·
Graduate Time an Illusion? Einstein Explains Why According to Relativity
- Ratzinger
- · Replies 17 ·
High School What is the exact definition of mass?
- mubashirmansoor
- · Replies 9 ·
Graduate Here's the way to go faster than light
- Giulio B.
- · Replies 7 ·
Undergrad Why can't electrons reach the speed of light in a particle accelerator?
- shaviprem
- · Replies 12 ·
Graduate What is Mach's principle and why did Einstein care?
- gulsen
- · Replies 31 ·
Graduate Gravitational wave models in GR and gaps in Einstein's lectures
- John_Doe
- · Replies 9 ·
Graduate Can We Really Time Travel by Exceeding the Speed of Light?
- darignac
- · Replies 2 ·
Graduate Lightspeed: does the definition of time make it constant?
- JUboy
- · Replies 3 ·
Graduate How to show something transforms as a covector?
- Baggio
- · Replies 4 ·
Graduate Does teaching photons have dynamic mass mislead students?
- bernhard.rothenstein
- · Replies 49 ·
Check Out This Link - A Puzzling Argument
- LnGrrrR
- · Replies 13 ·
High School Why is light's speed the fastest speed?
- Crusty
- · Replies 10 ·
Graduate Why doesn't a runner stationary relative to Earth have a slower clock?
- yogi
- · Replies 24 ·
Graduate Is Lorentz Contraction Real in the Frame of Reference of a Moving Object?
- GiTS
- · Replies 11 ·
Graduate About the geometry of general relativity
- Philippe
- · Replies 7 ·
Undergrad Why does a westbound plane age faster than an eastbound plane?
- kuahji
- · Replies 8 ·
Graduate Can objects catch up with their own photons?
- eweast
- · Replies 7 ·
Graduate Anisotropy of the speed of light?
- Garth
- · Replies 12 ·
Graduate Can curved space explain magnetic force like it explains gravity?
- -Job-
- · Replies 7 ·
Undergrad Does light travel slower through fiber optic cable than through vacuum?
- Glenn
- · Replies 15 ·
Graduate How can magnetic field be a relativistic phenomenon?
- Abu Abdallah
- · Replies 8 ·
Graduate Can photons slow down in media and be caught by a spacecraft?
- CBR600RR
- · Replies 1 ·
Graduate Two speed of light experiments at different altitudes
- kmarinas86
- · Replies 10 ·
Graduate Final Theory and Orbital Mechanics
- Simran737
- · Replies 13 ·
Undergrad Do Photons Have Mass and Kinetic Energy?
- mubashirmansoor
- · Replies 10 ·
Graduate What will happen to time if we travel away from Earth at 0.9999c?
- catalyst55
- · Replies 31 ·
Graduate Do galaxies receding at 0.99c and 0.98c from Earth recede from each other faster than c?
- Chaos' lil bro Order
- · Replies 35 ·
Graduate Consistency of the speed of light
- Moneer81
- · Replies 431 ·
Graduate How Quickly Does Gravity Propagate?
- JerryCic
- · Replies 3 ·
Graduate Palatini Formalism generalizes GR to include degenerate metric?
- kakarukeys
- · Replies 4 ·
Graduate Gravitational Equivalent of Magnetic Field Measured in Lab
- wolram
- · Replies 20 ·
Undergrad How does a body escape its gravitational field?
- -Job-
- · Replies 8 ·
Graduate Relative Speeds and the Limit of Light
- nu_paradigm
- · Replies 2 ·
Graduate Derieving relativistic electrodynamics equations
- gulsen
- · Replies 17 ·
Graduate Using muon decay to test for an absolute reference frame
- Nereid
- · Replies 2 ·
Graduate Is Relativity an Illusion or Reality?
- virtual_inside
- · Replies 7 ·
Graduate What is the Flaw of General Relativity Regarding Uniform Gravitational Fields?
- Zanket
- · Replies 85 ·
Graduate Are derivations of Lorentz transformations pedagogically useful?
- bernhard.rothenstein
- · Replies 29 ·
Graduate Velocity of light in accelerating spaceship and local inertial frames in GR
- Ratzinger
- · Replies 5 ·
Graduate Why does Earth maximize proper time while accelerating on a geodesic?
- Thrice
- · Replies 17 ·
Undergrad Does time really stop at the speed of light or just decay slows down?
- physicscrap
- · Replies 87 ·
Graduate Could the expansion of space impact the distance between the Earth and the sun?
- AcidRainLiTE
- · Replies 4 ·
Undergrad How to derive E=mc²
- Milind_shyani
- · Replies 2 ·
Graduate Geodesics in schwarzschild solution
- Pietjuh
- · Replies 2 ·
Graduate Gravitational Field of a Spinning Mass: Exploring the Math
- John_Doe
- · Replies 1 ·
Graduate Perspective of Massless objects
- LnGrrrR
- · Replies 9 ·
Graduate Weight of Hot Body: Balance in Thermal Equilibrium?
- bernhard.rothenstein
- · Replies 1 ·
Undergrad What about this Final Theory thing?
- Simran737
- · Replies 1 ·
High School Time Is Relative: What Does It Mean?
- Helicobacter
- · Replies 1 ·
Graduate Topology of de Sitter and black hole
- touqra
- · Replies 1 ·
Graduate Does rotating asymmetric rod violate Newton's third law?
- my_wan
- · Replies 2 ·
Graduate Aetherists and the doppler effect
- bernhard.rothenstein
- · Replies 13 ·
Graduate Does Space Expand Faster Than Light Beyond Our Observable Universe?
- Chaos' lil bro Order
- · Replies 1 ·
Undergrad Questions about the speed of light
- ADHDandSubtract
- · Replies 13 ·
Graduate Special Relativity and Thermal Physics finals
- franznietzsche
- · Replies 31 ·
Graduate Time between emission and observation of light for moving source
- richardbroadstone
- · Replies 7 ·
Graduate Can Space Travel Faster Than the Speed of Light?
- Chaos' lil bro Order
- · Replies 13 ·
Graduate Time and Space dilation and contraction
- scott_alexsk
- · Replies 2 ·
Graduate Is gravity the cause or result of spacetime curvature?
- Mk
- · Replies 14 ·
Graduate Charge Dilation: Mass/Energy Increase, Charge Constant
- gulsen
- · Replies 4 ·
Graduate Curved spacetime is described by a manifold
- pensano
- · Replies 9 ·
Graduate Questions on Spacetime Curve/Gravity
- Equation
- · Replies 1 ·
Undergrad Lorentz- and Galileian-transformation
- Eivind
- · Replies 9 ·
Graduate Do Antitachyons Travel Slower Than Light?
- skywolf
- · Replies 2 ·
Graduate Bending of Light around a Star
- kmarinas86
- · Replies 1 ·
Graduate Photon passing through a black hole?
- Graviman
- · Replies 24 ·
Graduate Why is the Angle Between Timelike Vectors Given by g(X,Y)?
- Oxymoron
- · Replies 17 ·
Graduate Searching for "Perihelium Precession Problem" Derivation in General Relativity
- dextercioby
- · Replies 10 ·
Graduate Potential energy and GR, something doesn't add up
- tbitz
- · Replies 6 ·
Graduate If special relativity were wrong, what paradoxes would arise?
- Ratzinger
- · Replies 10 ·
Does anyone know Jerry Noble's theory?
- cmee002
- · Replies 2 ·
Graduate Does a circling twin age the same as one traveling linearly in the twin paradox?
- ubavontuba
- · Replies 9 ·
Graduate Why is light traveling through the ether not just at speed c?
- RooftopDuvet
- · Replies 4 ·
Graduate Detecting Space Time: Gravitational Radiation
- wolram
- · Replies 5 ·