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 The opposite of the limit of light
- Slait
- · Replies 9 ·
Undergrad Do Laser Beams from Spacecrafts Travel at Different Speeds?
- ombudsmansect
- · Replies 5 ·
Graduate How Does Curved Space Around Black Holes Compare to L2 and LP Spaces?
- granpa
- · Replies 3 ·
Graduate Representation of covariant and contravariant vectors on spacetime diagrams
- mersecske
- · Replies 5 ·
High School Mathematical derivation of E=mc²
- nickthrop101
- · Replies 1 ·
High School Question About a light beam .
- xchaos01
- · Replies 4 ·
Graduate If energy is relative, how can E=mc² be frame-invariant?
- PhizzicsPhan
- · Replies 49 ·
Graduate Conformal group -> Poincaré group
- Petr Mugver
- · Replies 13 ·
Graduate Time dilation due to relative velocity
- barnesbb
- · Replies 6 ·
Graduate Length contraction and rod falling thorough a grate ?
- cragar
- · Replies 3 ·
Graduate Experiment Showing Relativistic Effects in PD Acceleration
- RK1992
- · Replies 4 ·
Graduate Things that can't happen on a manifold
- bcrowell
- · Replies 21 ·
Graduate Is it possible that black holes do not exist?
- rjbeery
- · Replies 52 ·
Graduate Why Is It Impossible To Reach The Speed Of Light?
- johnnya
- · Replies 52 ·
Graduate Why does light take 8 minutes to reach Earth if time stops at light speed?
- -=Red=-
- · Replies 25 ·
Graduate Does transverse light emission conserve longitudinal momentum like Newtonian particles?
- Austin0
- · Replies 87 ·
Undergrad Artificial gravity meeting zero gravity
- icez
- · Replies 35 ·
Graduate Motion in Spacetime (using internal forces), swimming/gliding.
- Sbaraka
- · Replies 9 ·
Graduate Regarding quasars not showing signs of time dilation.
- theouthouse66
- · Replies 6 ·
Undergrad Same old song and dance - special relativity
- jinksys
- · Replies 21 ·
Graduate Schwartsschild from Newton + Relativity
- selfAdjoint
- · Replies 6 ·
Graduate Space-Time curvature? the units?
- MoonAlex
- · Replies 5 ·
Graduate Does heat generate additional gravity
- BrianConlee
- · Replies 2 ·
Graduate Speed of Light in Cesium Vapors
- Ralph Spencer
- · Replies 5 ·
Graduate GR with Riemannian ( ) metric?
- petergreat
- · Replies 4 ·
Graduate Clock rates and effective ptotential.
- yuiop
- · Replies 27 ·
Graduate Gravitational lensing paradoxon
- mersecske
- · Replies 2 ·
Graduate Eddington Finkelstein Coordinates + Black Holes
- discjockey
- · Replies 5 ·
Graduate Time dilation at relativistic speeds to Alpha Centauri
- bobbarker00
- · Replies 1 ·
Graduate Maxwell's equations in curved spacetime.
- eok20
- · Replies 3 ·
Graduate Can we use the Schwarzschild metric under the horizon?
- mersecske
- · Replies 9 ·
Graduate How do you prove physical laws are the same in all inertial frames?
- Myslius
- · Replies 42 ·
Undergrad Speed of Light: Can We Reach It?
- agent_509
- · Replies 2 ·
Graduate How to Calculate the Variation of Quadratic Action for Riemann Tensors?
- archipatelin
- · Replies 1 ·
Is Time Slowing Down? Scientists Weigh In
- elbeasto
- · Replies 5 ·
Graduate Is this why relativity and quantum physics don't mix?
- least_action
- · Replies 4 ·
Graduate Time Travel and the Conservation of Matter Problem
- spl3001
- · Replies 8 ·
Graduate What Does the r=0 Singularity Represent as an Event at Fixed Time in Spacetime?
- mersecske
- · Replies 1 ·
Graduate Gravitational time dilation vs velocity time dilation
- rhenretta
- · Replies 22 ·
Undergrad Are there experiments proving special relativity wrong or particles faster than light?
- moses99
- · Replies 2 ·
Graduate Elementary question - Special relativity
- endverse
- · Replies 2 ·
Graduate Does Newton's bucket need other masses to show inertial effects?
- Buckethead
- · Replies 160 ·
Graduate Stone's derivation of Thomas rotation
- Rasalhague
- · Replies 142 ·
Graduate Integrating an accelerating Worldline
- Austin0
- · Replies 69 ·
Graduate Light has mass, and it travels at the Speed of light, so a massless object .
- iAWESOME
- · Replies 2 ·
Graduate What is the current status of Unnikrishnan's reassessment of special relativity?
- mysearch
- · Replies 18 ·
Moving though space but not time?
- s1c0
- · Replies 15 ·
Graduate Maxwell's Equations in the Light of General Relativity
- Anamitra
- · Replies 4 ·
Graduate General Relativity and a Force Mediating Graviton?
- Zhabka
- · Replies 4 ·
Graduate Can a wire stretched to a receding galaxy transmit information faster than light?
- rede96
- · Replies 132 ·
Graduate Do both observers measure each other's clocks running slow in special relativity?
- LBrandt
- · Replies 18 ·
Graduate How do space and time differ fundamentally in relativity?
- Ratzinger
- · Replies 25 ·
Graduate The scope of inertial time dilation?
- mysearch
- · Replies 13 ·
Traveling at the speed of light in orbit around a black hole
- Somedude99
- · Replies 6 ·
Undergrad Why do we have red shift and blue shift, and not only one?
- AntigenX
- · Replies 18 ·
Graduate Are forces subject to the doppler effect?
- kmarinas86
- · Replies 2 ·
Graduate Satisfies Killing equation, but not a Killing field?
- bcrowell
- · Replies 3 ·
Graduate Schwarzschild metric not stationary inside the horizon?
- bcrowell
- · Replies 3 ·
Undergrad 2 spinning or orbitting objects and their effect on time
- trebe
- · Replies 8 ·
Graduate Why does using Earth's actual mass distribution change time dilation predictions?
- plenum1
- · Replies 12 ·
Graduate Is Non-reciprocal Time Dilation Possible in This Scenario?
- Austin0
- · Replies 22 ·
Graduate What is the significance of the Rubik Group in combinatorial species theory?
- Chris Hillman
- · Replies 8 ·
Graduate A beam of light compared to bullet in gun
- freshnfree
- · Replies 16 ·
Graduate Diffeomorphism invariance and Noether's theorem
- cuallito
- · Replies 7 ·
Graduate Length Contraction Euclidean Space
- vengy
- · Replies 13 ·
Graduate How does the energy and time dilation of objects moving at high speeds work?
- Aeodyn
- · Replies 13 ·
Graduate How could a character glimpse another planet using real physics?
- DeepCoverage
- · Replies 2 ·
Graduate Special Relativity and the Particle-Antiparticle Problem
- Anamitra
- · Replies 2 ·
Graduate What would happen to gravity and mass if Earth spun much faster?
- boffinwannabe
- · Replies 7 ·
Graduate Is the speed of light always constant in non-inertial frames?
- Anamitra
- · Replies 27 ·
Graduate General relativity time dilation
- TrickyDicky
- · Replies 1 ·
Undergrad Would the other end move instantaenously
- kevevans
- · Replies 24 ·
Graduate Does Fizeau's experiment show that moving bodies don't drag ether?
- Reshma
- · Replies 4 ·
Graduate Is there any reason for tensor indices being ordered one way or the other?
- CPL.Luke
- · Replies 12 ·
Graduate Is the Grandfather Paradox a Flaw in Time Travel's Cause and Effect?
- Amateur001
- · Replies 10 ·
Graduate Can we travel back in time and survive it?
- mlw
- · Replies 17 ·
Graduate Can Special Relativity Predict Gravitational Effects?
- snoopies622
- · Replies 52 ·
Undergrad Surpassing the speed of light.
- Paindealer
- · Replies 22 ·
Graduate Change in internal energy => change in rest mass
- AcidRainLiTE
- · Replies 1 ·
Graduate Why Do We Use the Speed of Light to Measure Time in Minkowski Space?
- maxverywell
- · Replies 14 ·
Graduate Local lorentz tranformations of fermion action
- jdstokes
- · Replies 1 ·
Graduate Special Relativity/Lorentz Transformation Derived in two minutes
- yuedongxiao
- · Replies 26 ·
Graduate Speed of light in NON-inertial frames
- Curl
- · Replies 49 ·
Graduate Lorentz factor equal to infinity + lots of questions
- fluidistic
- · Replies 46 ·
Graduate Light implying consistency between QM and SR
- DaTario
- · Replies 4 ·
Graduate Light pulse in cable accelerated to 0.75c reaching ship B before direct light beam
- rede96
- · Replies 8 ·
Undergrad Is Gravity a function of mass or density
- curiouschris
- · Replies 7 ·
Graduate Deriving the energy-momentum relation E² = (pc)² + (mc²)²
- kaleidoscope
- · Replies 12 ·
Undergrad Lorentz Transformations Question
- aguycalledwil
- · Replies 10 ·
Undergrad Does a photon have energy density?
- member 141513
- · Replies 4 ·
Graduate The Double Slit Experiment from a Photon Point of View
- Izhaki
- · Replies 7 ·
Graduate Question on lorentz transformation equations
- demonelite123
- · Replies 2 ·
Graduate Why is it a problem that gravity is so much weaker than the other forces?
- camel_jockey
- · Replies 4 ·
Graduate Can the Reissner–Nordström metric for charged black holes be tested?
- petergreat
- · Replies 4 ·
Graduate What software is commonly used for solving problems in relativity?
- jason12345
- · Replies 9 ·
Graduate So, the question is: Is the concept of a function contravariant?
- Troponin
- · Replies 3 ·
Graduate Raising indices on derivatives in linearized gravity
- dm4b
- · Replies 8 ·
Graduate Does Time Variation Necessarily Imply Full Spacetime Metric?
- wonderingmd
- · Replies 2 ·
Graduate Does general relativity allow for faster than light travel?
- Jocko Homo
- · Replies 15 ·
Graduate Gravitation #3.14: Showing dF=0 as Geometric Version of Maxwell's Equations
- Living_Dog
- · Replies 3 ·