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 Confused About Tensor Density Behaviour
- Gunthi
- · Replies 4 ·
Graduate Conservation of Four-Momentum in Neutrino-Electron Collision
- *LouLou*
- · Replies 6 ·
Graduate Did I understand this correctly - time slowes down due to acceleration?
- Nikitin
- · Replies 27 ·
Graduate Special Relativity basic concepts confusion
- math_maj0r
- · Replies 1 ·
Undergrad Two lightnings that happen at the same time, a train and a passanger
- Nikitin
- · Replies 42 ·
Graduate Relativity and elementary physics
- 1MileCrash
- · Replies 10 ·
Graduate Conservation of Momentum puzzle
- ?????
- · Replies 7 ·
Graduate Effects of Constant Curvature on Radiation: Red-Shift or Unaffected?
- thehangedman
- · Replies 2 ·
Graduate General Relativity Gravitation Calculations
- cbd1
- · Replies 10 ·
Graduate Understanding Aging and Time Dilation: The Twin Paradox Explained
- jbar18
- · Replies 3 ·
Graduate Why does length contraction happen only in the direction of motion?
- nikeadidas
- · Replies 5 ·
Graduate Does an accelerated particle emit gravitational waves?
- bbbeard
- · Replies 9 ·
Graduate Does it mean that as you increase the energy of a particle
- Helicobacter
- · Replies 2 ·
Graduate What are the effects of Gravitomagnetism?
- Vorde
- · Replies 1 ·
Graduate Is General Relativity a Gauge Theory?
- MeJennifer
- · Replies 17 ·
Undergrad Simple realtivity: Length contraction
- seto6
- · Replies 27 ·
Graduate Hi This is the definition of simultaneity I was taught: Two
- blueberrynerd
- · Replies 9 ·
Graduate Relative motion - disagreement at very low speeds
- csmcmillion
- · Replies 1 ·
Graduate Is Gravity Fictitious? A Look at Victor Stenger's The Fallacy of Fine Tuning
- bobsmith76
- · Replies 29 ·
Undergrad 2 objects travailing in opposite directions?
- saldion
- · Replies 2 ·
Graduate Math Courses Relevant to General Relativity
- diligence
- · Replies 4 ·
Graduate Massive Object's Relativistic Velocity: What Happens to Earth?
- cowmoo32
- · Replies 3 ·
Graduate Why do mass, time and length change at a rate determined by Gamma?
- Dappy
- · Replies 9 ·
Graduate Is Lorentz factor reality true according to the laws of physics?
- LUH
- · Replies 1 ·
Graduate Is Gravity Affected by its Own Potential Energy?
- Runner 1
- · Replies 63 ·
Graduate Is There a Limit to the Speed of Time?
- karlf94
- · Replies 7 ·
Graduate Covariant Derivative: Different for Vectors, Spinors & Matrices?
- thehangedman
- · Replies 1 ·
Graduate How can I easily study the derivation of Kerr Metric?
- utku
- · Replies 23 ·
Graduate Background required for general relativity
- khil_phys
- · Replies 8 ·
Graduate Value of a measuring rod in an expanding universe?
- rasp
- · Replies 1 ·
Undergrad Is EVERYTHING affected by gravity?
- Runner 1
- · Replies 2 ·
Graduate Confusion in Lorentz Boost Equations: Minus Sign Needed?
- facenian
- · Replies 3 ·
Graduate What relativity really looks like
- Erland
- · Replies 5 ·
Graduate Do Total Current and Total Charge form a Lorentz Covariant Vector.
- Phrak
- · Replies 81 ·
Graduate Why Did the Michelson-Morley Experiment Expect Different Measures on Earth?
- AlfreCabo
- · Replies 9 ·
Graduate Is Gravity Really a Gauge Theory?
- matt91a
- · Replies 3 ·
Graduate Testing a Relativity Simulator
- TestTubeGames
- · Replies 3 ·
Undergrad Does Earth's Rotation Affect Distance for Light to Travel? | Explained
- AH_AHSAN
- · Replies 3 ·
Undergrad Light Clock Example this is not HW
- slam7211
- · Replies 14 ·
High School How Can Laser Spot Move Faster Than Light?
- AH_AHSAN
- · Replies 13 ·
Graduate Theory of relativity challenged
- abrowaqas
- · Replies 2 ·
Undergrad Could Non-Linear Length Contraction Resolve Relativity Paradoxes?
- artkingjw
- · Replies 5 ·
Graduate Explaining Rigid Body Movement with 15*3*10^8m Stick
- arunrajagopal
- · Replies 3 ·
Graduate How did Einstein get to the fact that mass slows time?
- Sarcastic14
- · Replies 8 ·
Undergrad What are the Requirements for Time to be Considered a Vector?
- romsofia
- · Replies 6 ·
Graduate In what way do we still not understand gravity?
- dydxforsn
- · Replies 3 ·
Graduate What faster than light have to do with cause and effect paradox ?
- AH_AHSAN
- · Replies 6 ·
Graduate Does Earth's Elliptical Orbit Affect Time Dilation Due to Gravity?
- nitsuj
- · Replies 4 ·
Graduate Can an Infinitely Stiff Rod Defy the Speed of Light in Relativity?
- ?????
- · Replies 40 ·
Graduate What Common Misconceptions Do People Have About Relativity?
- srikar97
- · Replies 3 ·
Graduate Time-Like Intervals: Can't Find an Inertial Frame for Events?
- Master J
- · Replies 5 ·
Graduate Value of energy-momentum tensor in weak field approximations
- peter46464
- · Replies 5 ·
Undergrad Question on Michelson Morley experiment and length contraction
- mangaroosh
- · Replies 65 ·
Graduate Why do some think faster than c= time travel?
- Edi
- · Replies 11 ·
Undergrad Question about the rotating disk
- dude222
- · Replies 11 ·
Graduate How does Ricci curvature represent volume deficit ?
- AuraCrystal
- · Replies 7 ·
Undergrad Is There a Scientific Consensus on the Connection Between Inertia and Gravity?
- NerseC
- · Replies 8 ·
Graduate Black Hole Light Pulses: The Fascinating Phenomenon Explained in Simple Terms
- keithdow
- · Replies 10 ·
Graduate Towards a Generic Integral for Tau in Schwarzschild Radial Motion
- Passionflower
- · Replies 3 ·
Undergrad What is the energy of a photon in relation to E=MC^2?
- Lazernugget
- · Replies 1 ·
Undergrad Why would faster-than-light travel cause time travel?
- Richyy
- · Replies 4 ·
Undergrad Is Special theory of relativity only about speed of light?
- nikeadidas
- · Replies 8 ·
Graduate Why does time slow down as you approach C?
- Darius Macab
- · Replies 36 ·
Graduate How does the block universe concept relate to the 4-D location of observers?
- bobc2
- · Replies 17 ·
Graduate 1/2 kilogram black hole: thought experiment
- Thetes
- · Replies 7 ·
Graduate Why is the Speed of Light Key to the Mass-Energy Equation?
- Jarwulf
- · Replies 15 ·
Undergrad How do Maxwell's equations indicate that the speed of light is constant?
- joyz2008
- · Replies 11 ·
Graduate Time dilation and length contraction in hyperbolically-curved spacetime
- kmarinas86
- · Replies 8 ·
Graduate Relative increase in fuel mass
- schonovic
- · Replies 3 ·
Graduate Independent components of the curvature tenso
- PAllen
- · Replies 78 ·
Graduate Question about Hawking radiation in BH
- jnorman
- · Replies 1 ·
Graduate Deriving General Lorentz Boost Equation
- HJ Farnsworth
- · Replies 10 ·
Graduate Gravitational acceleration in GR
- kvantti
- · Replies 8 ·
Undergrad Speed of light last value accepted 1983
- Mordred
- · Replies 13 ·
Graduate Relativistic Energy in an Inverse Square Field: The Impact of Velocity
- granpa
- · Replies 10 ·
Graduate What is the bare Minimum Lagrangian\Hamiltonian mechanics
- cpsinkule
- · Replies 3 ·
Graduate Three clocks on moving platform: relativity of simultaneity
- Agrippa2
- · Replies 3 ·
Graduate Faster than light and time travel
- byron178
- · Replies 36 ·
Graduate Quick question about lorentz transforms
- spacelike
- · Replies 2 ·
Graduate Acceleration measured in another inertial frame?
- sudhirking
- · Replies 4 ·
High School Time Problem at Mt. Everest: Base vs Summit
- GarryS
- · Replies 4 ·
Graduate MTW 25.29 v.s. 25.38 (first formula)
- Passionflower
- · Replies 14 ·
Undergrad If two spaceships are moving toward each other at the 0,9c
- eldrun
- · Replies 4 ·
Graduate If a neutrino has a non-zero mass
- kfmfe04
- · Replies 3 ·
Graduate Can Space and Matter Exist Without Time?
- Ki Man
- · Replies 25 ·
Graduate Is time reversal logically consistent?
- kmarinas86
- · Replies 8 ·
Graduate Project ideas for modern physics class
- Stevo6754
- · Replies 1 ·
Graduate Minkowski diagram - the angle between axes
- 3nTr0pY
- · Replies 2 ·
Graduate OPERA neutrino arrivals analysis
- lalbatros
- · Replies 2 ·
Graduate Just a quick question on the derivation of energy
- genericusrnme
- · Replies 2 ·
Graduate Wanting to understand the one-way speed of light problem in more detail please
- rede96
- · Replies 44 ·
Graduate Flash of light thought experiment, need explanation
- marmot
- · Replies 2 ·
Undergrad Time with no gravitational force
- Guiga
- · Replies 5 ·
Graduate About confusion of lenght contraction, and possiblity of length expansion
- A Dhingra
- · Replies 11 ·
Graduate Derivative of a function of a lorentz scalar
- RedX
- · Replies 3 ·
Graduate Variation of the auxiliary worldsheet metric
- Jack2013
- · Replies 3 ·
Graduate Combining time dilation and length contraction
- Teachme
- · Replies 3 ·
Graduate Length contraction and the expansion of the universe.
- mrspeedybob
- · Replies 2 ·
Graduate I am sitting on my chair, am I accelerating for General Relativity?
- ArthurB
- · Replies 7 ·
Graduate If CERN's claim is true, how would SR and GR change?
- zeromodz
- · Replies 1 ·