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 Time dilation effects on a human being
- stawker
- · Replies 6 ·
Graduate Do radio waves follow Earth's curvature because of gravity?
- MinnesotaState
- · Replies 4 ·
Graduate Understanding Positive and Negative Intrinsic Curvature in General Relativity
- ktx49
- · Replies 40 ·
Graduate How did the universe emerge from the Big Bang if time didn't exist in infinite gravity?
- Alan McDougal
- · Replies 1 ·
Graduate Relativity and the question of age
- Naveen3456
- · Replies 68 ·
Graduate What does Ricci flat mean for black hole spacetimes?
- Philosophaie
- · Replies 6 ·
Graduate Is it fair to state mass distorts space-time
- MinnesotaState
- · Replies 8 ·
Graduate Does g(r,t) = 0 determine a black hole, or just indicate one?
- sadegh4137
- · Replies 2 ·
Graduate Measurement in special relativity
- sadegh4137
- · Replies 9 ·
Graduate Why is it obvious that the derivative of a 4-vector is also a 4-vector
- wotanub
- · Replies 4 ·
Graduate What is the composition and temperature at the centre of a black hole?
- stewart brands
- · Replies 26 ·
Graduate Is Special Relativity a field theory?
- QuantumCurt
- · Replies 19 ·
Graduate Do rotating frames have planes of simultaneity?
- analyst5
- · Replies 29 ·
Graduate Black hole fall description: blue-shifted stars, tunnel vision, no escape
- Drakkith
- · Replies 1 ·
Graduate Lorentz transformation of energy and E = h f
- johne1618
- · Replies 12 ·
Undergrad What is Mach's principle and is it correct?
- sanjone
- · Replies 1 ·
Undergrad Time dilation for spacecraft traveling at 0.9c to a planet 6.7 light years away
- danny20051
- · Replies 7 ·
Graduate Does the Mass of a Magnesium Lamp Decrease After Emitting Light?
- Philosopha
- · Replies 17 ·
Graduate What Determines the Specific Speed of Light in Our Universe?
- jacassidy2
- · Replies 3 ·
Undergrad Can simultaneous events in one frame be simultaneous in another frame?
- Solarmew
- · Replies 10 ·
Undergrad How Can an Ant and a Melon Explain Time-Space Theory?
- B4ssHunter
- · Replies 2 ·
Undergrad How is light speed constant and in all directions ?
- B4ssHunter
- · Replies 9 ·
Undergrad Weight of Fast Rotating Gyro - Does Angular Velocity Increase Weight?
- leave
- · Replies 1 ·
Graduate Can braking a very long bus accelerate brake fluid faster than light?
- Darko M
- · Replies 15 ·
Graduate Relativistic corrections to classical physics formulae
- Positron137
- · Replies 4 ·
Graduate Relation between de Sitter and Poincare Groups
- Raifeartagh
- · Replies 2 ·
Graduate Calculating Radiation Measured from Moving Star
- asras
- · Replies 4 ·
Graduate Time at the center of a black hole?
- flyinjoe
- · Replies 2 ·
Graduate Can we separate system and environment in general relativity?
- sadegh4137
- · Replies 1 ·
Graduate A physical description of some GR concepts
- R136a1
- · Replies 6 ·
Graduate Inertial reference frames in general relativity
- analyst5
- · Replies 13 ·
Graduate Black Hole Complementarity Question
- PeterDonis
- · Replies 12 ·
Graduate Why is Scalar Cam Built with Second-Order Derivative of Metric Ricci Scalar?
- sadegh4137
- · Replies 1 ·
Undergrad Thought experiment of relativity
- ranjitnepal
- · Replies 4 ·
High School Can you explain the twin paradox simply?
- ranjitnepal
- · Replies 7 ·
Graduate Find Solutions to Black Hole Questions
- sadegh4137
- · Replies 5 ·
Graduate Can Acceleration and Gravity Equally Affect Time Dilation?
- Maartenn100
- · Replies 2 ·
Graduate Can We Harness Energy from Light to Power Space Travel?
- shawneric
- · Replies 12 ·
Graduate The Structure of Galilean Space
- littleHilbert
- · Replies 8 ·
Undergrad Gravitational Constant (Big G I think)
- p1l0t
- · Replies 8 ·
Graduate Simplifying Equation (14) from Zee's Einstein Gravity for PhD Students
- russelljbarry15
- · Replies 3 ·
Graduate What Direction is Light Observed From a Moving Source.
- T0mr
- · Replies 10 ·
Graduate Schwarzschild metric as Minkowski tensor with eigenvalue conditions
- Philosophaie
- · Replies 1 ·
Graduate Deriving formula ∆t=Lv/c^2 using special relativity
- DonutMaster
- · Replies 2 ·
Graduate How can a particle coming from infinity get on bound orbit around BH?
- Eudaimon
- · Replies 11 ·
Graduate Particles traveling back in time
- michael879
- · Replies 52 ·
High School Where Are the Boundaries of the Universe and How Can We Measure Them?
- anuraj.b
- · Replies 6 ·
Graduate Moving faster than light in Schwarzshield radius
- Dreak
- · Replies 10 ·
Graduate Does an explicit list of 20 independent compenents of Riemman exist?
- ozone
- · Replies 6 ·
Graduate Why doesn't spacetime react when mass bends it?
- Naveen3456
- · Replies 70 ·
Graduate Space and Earth's (and other planet's) movement through it
- Menaus
- · Replies 5 ·
Graduate Checking if Schwarzschild Space-Time is Locally Minkowskian
- jk22
- · Replies 1 ·
Graduate The Physics of Length Contraction of physical objects and distances
- mikiel
- · Replies 29 ·
Graduate How much of a black hole's mass comes from its charge and angular momentum?
- michael879
- · Replies 3 ·
Undergrad Lorentz transform low velocity limit
- geoduck
- · Replies 10 ·
Graduate Exactly Why C is impossible for Massive Objects?
- AndromedaRXJ
- · Replies 52 ·
Graduate Does a moving photon have relativistic mass?
- brenan
- · Replies 15 ·
Graduate Understanding Acceleration and Geodesics in Curved Spacetime
- DiracPool
- · Replies 7 ·
Graduate Is the Modified Lagrangian Formula Correct in Ray D Inverno Problem 11.5?
- Duvan_Br
- · Replies 1 ·
Graduate Why do Hawking and Ellis assume spacetime is connected?
- WannabeNewton
- · Replies 38 ·
Undergrad What are the accepted theories for the source of gravity?
- ZionsRodeVos
- · Replies 40 ·
Graduate Why Is General Relativity Nonlinear Compared to Other Fundamental Equations?
- hilbert2
- · Replies 8 ·
Graduate How Does Special Relativity Explain Particle Attraction?
- analyst5
- · Replies 5 ·
Graduate Seeing the entire future of the Universe
- Naty1
- · Replies 2 ·
Graduate (Almost) Black Hole = Fast Space Ship?
- GurSybngvatOen
- · Replies 19 ·
Graduate Deriving relativistic energy from four-vector components via integration over time
- Raze
- · Replies 7 ·
Undergrad How Does Time Dilation Affect Clocks at Different Speeds?
- MathJakob
- · Replies 12 ·
Graduate Relativistic Energy Derivation math problem
- michael154
- · Replies 5 ·
Graduate Recommended reading on Kaluza-Klein theories.
- center o bass
- · Replies 3 ·
Graduate What is the dielectric momentum density 4-vector?
- phys12345
- · Replies 18 ·
Graduate Time slowing down due to speed relative to the observer
- grantcallaway
- · Replies 5 ·
Graduate The consistency of the speed of light
- |mathematix|
- · Replies 5 ·
Graduate Are all Lorentzian 2-manifolds locally conformally flat?
- Infrared
- · Replies 2 ·
Graduate Do I arrive before a light-speed train if I jump off the front?
- Sweep
- · Replies 4 ·
High School Why does a ball come to rest if all reference frames should be equivalent?
- Naveen3456
- · Replies 14 ·
Graduate Covariance and contravariance in Lorentz transformations
- Dreak
- · Replies 4 ·
Graduate A question on a tweek of the Twin Paradox
- Zeno Marx
- · Replies 22 ·
High School Why Can't I See the Earth Rotating Below Me?
- nil1996
- · Replies 11 ·
Graduate Who first studied variable speed of light? - Einstein
- phys12345
- · Replies 25 ·
Graduate Speed of Light: Universe's Expansion After Big Bang
- Alpharup
- · Replies 7 ·
Graduate What does it mean when a quantity transforms like a vector?
- birulami
- · Replies 14 ·
Graduate Why does a spin-2 object under rotation transformations count as a rank-2 tensor?
- fairy._.queen
- · Replies 8 ·
Graduate Does gravity affect to wavelengths?
- Keru
- · Replies 2 ·
Graduate The importance of the relative movement
- PhyHunter
- · Replies 5 ·
Graduate Why doesn't the Weyl tensor vanish in 2D with a 2×2 metric?
- zn5252
- · Replies 2 ·
Graduate Do objects really fall into black holes from an outside observer's perspective?
- ShamelessGit
- · Replies 22 ·
Graduate Relativity and matter by Pauli
- TrickyDicky
- · Replies 13 ·
Graduate Why does constant force on an electron not produce constant acceleration?
- res3210
- · Replies 6 ·
Undergrad Caught Between Two Gravitational Fields
- James Brady
- · Replies 11 ·
Graduate Does general relativity require a manifold structure?
- friend
- · Replies 1 ·
Graduate Birkhoff's Theorem: Exterior Solution to Einstein's Field Equations
- maxverywell
- · Replies 5 ·
Graduate Why Does Space/Time Not Cause Friction?
- B.L.E.V.E.
- · Replies 3 ·
Graduate Clock synchronization in special relativity with two parallel moving rods
- Alasdair Beal
- · Replies 8 ·
Graduate 4-velocity with zero time component and squared length -1 in MTW
- TerryW
- · Replies 2 ·
Graduate Pushing with a lorentz contracting stick
- jartsa
- · Replies 3 ·
Graduate Is the Sun invisible at relativistic speeds? Part II
- tionis
- · Replies 86 ·
Graduate Komar integral derivation in Wald page 288
- WannabeNewton
- · Replies 6 ·
Undergrad Speed of Gravity: 299792458 m/s?
- Baluncore
- · Replies 8 ·
Graduate Relativity in a Rotating Space Station
- kaikalii
- · Replies 29 ·
Graduate Black holes , gravity upper limit
- Crazymechanic
- · Replies 4 ·