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 Does temperature increase with relativistic speed?
- blumfeld0
- · Replies 5 ·
Undergrad What does pressure mean in regards to GR?
- BWV
- · Replies 1 ·
Graduate Can tensors always commute with each other or are there exceptions?
- emma83
- · Replies 3 ·
Graduate Is 2nd postulate of SR necessary?
- Arham
- · Replies 39 ·
Graduate Question on general principle of relativity
- Ronald_Ku
- · Replies 5 ·
Undergrad Can two events happen at exactly the same time?
- Erasmus
- · Replies 5 ·
Graduate How are quantum mechanics and relativity incompatible?
- Pjpic
- · Replies 6 ·
Graduate What Does Repulsive Gravity Do to Space-Time?
- Charlie G
- · Replies 19 ·
Graduate Understanding Weinberg's Symmetries and Rays
- emma83
- · Replies 2 ·
Graduate About a Lorentz matrix and its inverse
- BarbaraDav
- · Replies 3 ·
Graduate Superextreme rotating black hole
- Dmitry67
- · Replies 10 ·
Graduate What Distinguishes Timelike from Non-Spacelike Curves in Spacetime?
- emma83
- · Replies 1 ·
Graduate Effects of non-linearity of GR
- Orbb
- · Replies 8 ·
Graduate Poisson brackets for Hamiltonian descriptions
- haushofer
- · Replies 3 ·
Graduate Mathamatical Description of the Cosmological Principle
- Haths
- · Replies 1 ·
Undergrad The Limitations of Time Travel: Ignoring Spatial Movement
- Peon666
- · Replies 21 ·
Graduate Einstein's STR is valid for systems that are not accelerating.
- lalbatros
- · Replies 5 ·
Graduate Addition of velocities for General Relativity
- nashphysics
- · Replies 24 ·
Graduate Four vector component. how to recognize it?
- bernhard.rothenstein
- · Replies 3 ·
Undergrad Flash Light at the Speed of Light Question
- LionTigerFire
- · Replies 4 ·
Graduate Is GR a 2nd order approximation in g?
- nickyrtr
- · Replies 4 ·
Graduate Is Proper Time the Only Measure of Motion in Spacetime?
- Curious6
- · Replies 5 ·
Graduate Can Relativity Explain a 5000 Year Old Universe with Billions of Light Years?
- BWV
- · Replies 8 ·
Graduate Can a moving observer see a past event in another frame via relativity of simultaneity?
- peio
- · Replies 7 ·
Graduate Reception times for EPR transmitters in two reference frames
- Austin0
- · Replies 23 ·
Undergrad Understanding Time Dilation: Whose Clock Ticks Faster in Special Relativity?
- Toftarn
- · Replies 5 ·
Graduate What are weak and null singularities in black holes?
- Dmitry67
- · Replies 7 ·
Graduate Plot of the Fabric of Spacetime - Schwarzschild
- fobos3
- · Replies 1 ·
Graduate Time Travel and Conservation Laws
- TheBaker
- · Replies 2 ·
Graduate Simultaneity; is it valid to deduce that events occur at the same time?
- MalachiK
- · Replies 7 ·
High School If the sun were to approach the earth
- pentazoid
- · Replies 5 ·
Graduate Velocity addition with tachyons at 0.8c and 2c
- Austin0
- · Replies 21 ·
Graduate Einstein's braking train example and free fall equivalence
- GregAshmore
- · Replies 3 ·
Graduate What distinguishes Kerr and Schwarzschild blackholes?
- JustinLevy
- · Replies 16 ·
Graduate Understanding (0,1)-Tensor in Relativity
- emma83
- · Replies 9 ·
Undergrad Why does E=mc² relate mass to the speed of light?
- TalonD
- · Replies 11 ·
Graduate What is spatial velocity in general relativity?
- Reedeegi
- · Replies 1 ·
Graduate Intriguing Questions Regarding Nature of Time in Special Relativity
- Curious6
- · Replies 11 ·
Graduate Do objects disappear or get stretched near a black hole's event horizon?
- derek.basler
- · Replies 10 ·
Graduate Thermal radiation during black hole collapse
- nickyrtr
- · Replies 25 ·
Graduate Stress-energy tensor for a rotating object
- stevebd1
- · Replies 1 ·
High School Online resources for learning relativity
- Naty1
- · Replies 1 ·
Graduate Lorentz contraction and simultaneous detection of the ends of the moving rod?
- bernhard.rothenstein
- · Replies 3 ·
Graduate Lorentz force and absolute velocity in magnetic fields
- mangoos
- · Replies 21 ·
Graduate Special Relativity and the Lagrangian
- dx
- · Replies 7 ·
Graduate Can Magnetic Fields Control Miniature Black Holes in Quantum Mechanics?
- mrlaughingman
- · Replies 10 ·
Graduate Why does curvature of spacetime affect stationary objects?
- Red Fox
- · Replies 17 ·
High School Can Gravitational Waves Actually Harm Us or Destroy Planets?
- Charlie G
- · Replies 1 ·
Undergrad Do objects moving at faster speeds have a stronger gravitational pull?
- gonegahgah
- · Replies 30 ·
High School What units is E=MC measured in?
- scupydog
- · Replies 6 ·
Undergrad Would the removal of the sun result in a shockwave?
- daytripper
- · Replies 6 ·
Graduate Is temperature an observer-invariant concept in relativity?
- Naty1
- · Replies 3 ·
Graduate Why is the volume element a scalar density of weight -1?
- madness
- · Replies 5 ·
Graduate What is the significance of the order of tensor indices?
- emma83
- · Replies 10 ·
Graduate Light and electric charge constant?
- Naty1
- · Replies 4 ·
Graduate Can Geodesic Deviation Prove the Gaussian Curvature of a Cylinder is Zero?
- MathematicalPhysicist
- · Replies 5 ·
High School Gravitational force between the moon and the Earth
- Victorian91
- · Replies 1 ·
Graduate Gravity only illusion due to expansion of universe?
- Gerenuk
- · Replies 54 ·
Undergrad Understanding Scattering of Light in the Atmosphere
- hartlw
- · Replies 5 ·
Graduate Mass and Energy Conservation in Relativistic Frames
- ankitpandey
- · Replies 5 ·
Graduate From the direct Lorentz transformation to the inverse one.
- bernhard.rothenstein
- · Replies 8 ·
Undergrad Is E=mc2 Related to Zeno's Paradox?
- dainamiku
- · Replies 30 ·
Graduate GR simulation - is it so difficult?
- Dmitry67
- · Replies 10 ·
Graduate What happens when you pull a 5-light-second rigid ribbon?
- mdl
- · Replies 1 ·
Graduate A question about the principle of special relativity
- erocket
- · Replies 3 ·
Graduate Do two accelerating objects with the same acceleration have the same proper time?
- MikeLizzi
- · Replies 23 ·
Undergrad Do high and low energy photons follow the same trajectory around a planet?
- nuby
- · Replies 45 ·
Graduate Relativistic Effects of 1-Min Flashlight on 10-Yr Solar Energy
- sid_galt
- · Replies 2 ·
Graduate Gravitational waves - second question
- tonyb1969
- · Replies 3 ·
Graduate Is the Speed of Light a Universal Constant if Time is Measured in Meters?
- matheinste
- · Replies 8 ·
Undergrad Having trouble understanding why FTL implies time travel
- kronnyq
- · Replies 155 ·
Graduate Does kinetic energy transform into heat at a microscopic level?
- completenoob
- · Replies 6 ·
Graduate How Does Special Relativity Connect Space and Time?
- bredmond812
- · Replies 8 ·
Graduate Special Relativity and Black Holes
- NewDescartes
- · Replies 38 ·
Graduate Deriving Christoffel symbols from the metric covariant derivative
- elenuccia
- · Replies 1 ·
Graduate Understanding Mass in Relativity: Misconceptions and Explanations
- Naty1
- · Replies 9 ·
Graduate The Effects of Relativistic Mass on Gravitational Attraction
- hartlw
- · Replies 12 ·
Graduate Event horizon - physical or chart-dependent?
- DrGreg
- · Replies 5 ·
Graduate Why is time more curved than space in gravity?
- Naty1
- · Replies 14 ·
Graduate New to STR, trying to confirm my understanding
- vibhuav
- · Replies 1 ·
Graduate Can Kerr Black Holes be Detected Through Gravitational Lensing Experiments?
- chronnox
- · Replies 4 ·
Graduate Eddington-Finkelstein coordinates
- dlw181
- · Replies 2 ·
Graduate Does Time Really Slow Down Near Massive Bodies, or Is It Just Light?
- ScienceNerd36
- · Replies 4 ·
Graduate Removing the Schwarzschild coordinate singularity
- DrGreg
- · Replies 12 ·
Graduate Colapse to singularity and Pauli principle.
- DanP
- · Replies 6 ·
Graduate Does time dilation mean a moving clock's measured speed is slower?
- cam875
- · Replies 19 ·
Graduate Space-time interval invariance question
- bernhard.rothenstein
- · Replies 5 ·
Graduate Taking Time as the Fourth Coordinate What are the implications?
- HIGHLYTOXIC
- · Replies 7 ·
Graduate Why is time considered a dimension in relativity?
- Yanah
- · Replies 12 ·
Graduate Entropy in a Black Hole: A Thermodynamic Paradox
- Bacat
- · Replies 3 ·
Graduate Is the Luminiferous ether still a valid concept?
- Suede
- · Replies 24 ·
Undergrad About time measurement vs measurement of movement
- rabbetussa
- · Replies 21 ·
Undergrad Energy-mass equivalence question
- Charlie G
- · Replies 4 ·
Graduate Naked Ring Singularities and Jets from AGNs
- Dmitry67
- · Replies 1 ·
Graduate What happens to gravity when light travels at the speed of light?
- Dmitry67
- · Replies 17 ·
Undergrad What are white holes and how do they differ from black holes?
- shubhra phy
- · Replies 2 ·
Graduate Black Holes and how gravity can overcome light speed?
- Boffin
- · Replies 25 ·
Graduate What is the Cusan transformation and its significance in the history of physics?
- matheinste
- · Replies 5 ·
Graduate Running real fast while holding a mirror
- Moneer81
- · Replies 7 ·
Undergrad Time Dilation: Is It a Consequence of Light?
- Charlie G
- · Replies 9 ·