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 What would happen if an object reached the speed of light?
- CAllFlow
- · Replies 9 ·
Undergrad Newton's Third Law, Speed of Light, and Relativity question
- FattyRNL
- · Replies 14 ·
Undergrad Trying to understand Relativity
- binbots
- · Replies 3 ·
Graduate Gravity and mass in General Relativity
- Mekon
- · Replies 2 ·
Graduate Yet another Twin Paradox thread
- Buckethead
- · Replies 78 ·
Graduate Special relativity:Reality or measurment error(?
- ShayanJ
- · Replies 40 ·
Graduate Rotation of a vertical cylinder in a gravitational field
- yuiop
- · Replies 7 ·
Graduate I don't understand the result of my Earth-muon calculations
- GregAshmore
- · Replies 16 ·
Graduate What are the Three Sources of Red-Shift in Astronomical Observations?
- nomadreid
- · Replies 4 ·
Graduate Linearity of Lorentz transformations
- ralqs
- · Replies 18 ·
High School Time Dilation & Stem Cell Therapy: Twin A vs Twin B
- myuncle
- · Replies 2 ·
Graduate Pedagogically direct demonstrations of SR and GR
- bcrowell
- · Replies 12 ·
Graduate Why perihelion shift and not aphelion?
- krishna mohan
- · Replies 4 ·
Graduate Tension in slowly rotating cylinder in gravity
- wasia
- · Replies 7 ·
Graduate Biologist Trying to do Physics - Badly
- cepheid
- · Replies 10 ·
Graduate Why does an infalling observer not see Hawking radiation?
- beno23
- · Replies 3 ·
High School A Time Machine may be on the way
- mathewmcgill
- · Replies 15 ·
Graduate Contradiction in Taylor-Wheeler's example of spacetime invariance
- GregAshmore
- · Replies 11 ·
Graduate The Plane Electromagnetic Wave in Vacuum
- Anamitra
- · Replies 5 ·
Graduate Length contraction, light speed and a bomb
- imsmooth
- · Replies 12 ·
Graduate Time Dilation in Rotating Bodies: Effects?
- Ian1108
- · Replies 1 ·
Graduate Is it possible to decrease space-time density?
- MattRob
- · Replies 6 ·
Graduate General metric with zero riemann tensor
- archipatelin
- · Replies 5 ·
Undergrad Is There a Solution for Installing GRTensorII on Mac OS X?
- smirshekari
- · Replies 1 ·
Graduate Infinite brightness in the singularity?
- DavidGahan
- · Replies 3 ·
Graduate Relativistically Invariant Tensors
- The_Duck
- · Replies 2 ·
Graduate Math: How to Convert Energy in Mass Units to Joules?
- imsmooth
- · Replies 3 ·
High School Travelling at speed of light and looking in the mirror
- seto6
- · Replies 18 ·
Graduate Limits of Frame Dragging: Can Objects Create Their Own Event Horizons?
- tkav1980
- · Replies 3 ·
Graduate What Do the Einstein Field Equations Reveal About Gravity in Expanding Space?
- zeromodz
- · Replies 7 ·
Undergrad How did Einstein come to the conclusion
- imsmooth
- · Replies 3 ·
Graduate Layman's question about the application of the curvature to space
- sngtdt
- · Replies 2 ·
Graduate Consequences of the Equivalence Principle
- unchained1978
- · Replies 7 ·
Graduate Is there a connection between covariance, invariance, and dark matter?
- Anamitra
- · Replies 6 ·
Graduate Maxwell's Eqns for Inertial Sys on Minkowski Space: Rindler (1977)
- Rasalhague
- · Replies 8 ·
Graduate Hawking Radiation: Does it Really Shrink Black Holes?
- Aeodyn
- · Replies 15 ·
Graduate ADM Mass for a diagonal metric
- praharmitra
- · Replies 3 ·
Graduate Is Time Travel Possible with Our Current Understanding of Space and Time?
- stever19
- · Replies 8 ·
Graduate Is Time Travel Possible According to General Relativity?
- benhsmith
- · Replies 5 ·
Graduate Exploring Relativistic Spinning Wheels: Radius & Simultaneity Paradoxes
- michelcolman
- · Replies 9 ·
Graduate Conditions for spacetime to have flat spatial slices
- PeterDonis
- · Replies 158 ·
Undergrad Special relativity adandons Maxwell's mechanical interpretation of EM?
- toan
- · Replies 5 ·
Graduate Can We Really Travel at Light Speed Without Feeling It?
- 1MileCrash
- · Replies 14 ·
Graduate The form of the lorentz transformations
- Identity
- · Replies 2 ·
Graduate A few questions about the Einstein field equations?
- zeromodz
- · Replies 2 ·
Graduate How does movement through solid objects work?
- gatzke
- · Replies 11 ·
Graduate Why Two Defs of Four-Momentum?
- LarryS
- · Replies 11 ·
Graduate When does Hawking radiation begin?
- PAllen
- · Replies 6 ·
Graduate What are the units of vectors and dual vectors?
- Phrak
- · Replies 23 ·
Graduate Is relativistic mass not an appropriate concept?
- SamRoss
- · Replies 31 ·
Undergrad Tapping a message over lightyears in an instant?
- airbourne
- · Replies 7 ·
Graduate Understanding the Nature of Gravity: Debunking the Need for Gravitons
- WrenGiles
- · Replies 15 ·
Graduate D'alembertian of lorentz transformation matrix
- lavster
- · Replies 1 ·
Graduate Age-Changes Caused By Instantaneous Velocity-Changes
- Mike_Fontenot
- · Replies 84 ·
Graduate Dirac brackets and gauge in special relativity.
- raul.cuesta
- · Replies 2 ·
Graduate What Happens to Communication at Light Speed?
- airbourne
- · Replies 6 ·
Graduate I'm currently reading DF Lawden's book Introduction to Tensor
- jbowers9
- · Replies 3 ·
Graduate Where is gravitational energy stored?
- Blenton
- · Replies 23 ·
Graduate Mathematical explanation of maximum speed limit c'
- sanko
- · Replies 8 ·
Graduate Doppler effect and the twin paradox
- hprog
- · Replies 13 ·
Graduate Question about length contraction
- tom.capizzi
- · Replies 40 ·
Graduate Is Time Defined Differently for Each Observer?
- paulselhi
- · Replies 1 ·
Graduate Mass equivalence and instantaneous gravitational field
- GregAshmore
- · Replies 30 ·
Undergrad Can Light Really Be Slowed to 38 mph?
- 1MileCrash
- · Replies 4 ·
Undergrad Has General relativity been proven wrong ?
- jamesfirst
- · Replies 5 ·
Graduate Speed of Light Dilemma: Einstein's Formula E=MC^2 Explained
- N99JH
- · Replies 8 ·
Graduate Relativistic Mass and Electrons vs. Muons
- maverick_starstrider
- · Replies 1 ·
Graduate Transitivity condition for Einstein synchronization and the one-way light speed
- elisir
- · Replies 50 ·
Graduate Tensor Contraction: Learn by Examples & Repetition
- tetris11
- · Replies 1 ·
Graduate Measuring procedure for Fermi Normal coordinates
- PAllen
- · Replies 1 ·
Graduate Fermi Normal coordinates for an infalling observer
- pervect
- · Replies 12 ·
Graduate Empirical test of Einstein's famous goof
- bcrowell
- · Replies 18 ·
Graduate Varitaion on the twin paradox that just doesnt work out for me
- Natman3400
- · Replies 8 ·
Graduate Simultaneity for entangled particles
- michelcolman
- · Replies 55 ·
Graduate Speed of light relative to what?
- Theo1
- · Replies 26 ·
Graduate Is clock become slower or faster
- Amit Shukla
- · Replies 18 ·
Graduate Can Space Appear Curved Due to Forces Similar to Magnetism?
- only_theory
- · Replies 30 ·
Graduate Dynamics of the Slowly Accelerated Electron from Einstein's original SR paper
- SamRoss
- · Replies 7 ·
Graduate A descriptive picture of radar simultaneity
- PAllen
- · Replies 5 ·
Graduate Expression of Gravitational Potential in GR
- neelakash
- · Replies 2 ·
Graduate Infinite Past and Future: Surprising Consequences of Time Dilation
- GoldNow
- · Replies 3 ·
High School Major difference of Inertial and non-inertial frame of reference ?
- jamesfirst
- · Replies 3 ·
Graduate Surpassing the speed of light?
- mrcross555
- · Replies 2 ·
Graduate Will two clocks be synchronized after a period of time dialation?
- James Brady
- · Replies 16 ·
Graduate Centrifugal Forces and Black Holes
- stevebd1
- · Replies 58 ·
Graduate Paradox within the twin paradox
- cshum00
- · Replies 128 ·
Graduate Sergei Winitzki's GR Book: Examining Errors in Conformal Transformations
- bcrowell
- · Replies 7 ·
Graduate Proposal for measurement of Lens Thirring effect
- stevenstritt
- · Replies 5 ·
Graduate What would reality be like without SR?
- teachmemore
- · Replies 18 ·
Graduate Gravity curvature and graviton
- Nikarus
- · Replies 18 ·
Graduate Do you know how to derive the General Theory of Relativity?
- FoxCommander
- · Replies 4 ·
Graduate How does light from the past ever reach me?
- closet mathemetician
- · Replies 7 ·
Graduate Massless Klein-Gordon equation not conformally invariant?
- bcrowell
- · Replies 6 ·
Graduate Understanding the Equality in Equation 2.96: Volume Element as n-Form?
- LAHLH
- · Replies 3 ·
Graduate Can general relativity explain the difference in tides between land and sea?
- dodo
- · Replies 3 ·
Undergrad Time Travel Proposal: Observing Objects from the Past?
- NetMage
- · Replies 5 ·
Graduate What is the measurement of an angle in special relativity?
- sudhindra
- · Replies 1 ·
Graduate Does gravitational mass change during collapse?
- nickyrtr
- · Replies 16 ·
Graduate Chern-Simons Form Explained: General Relativity
- jinbaw
- · Replies 1 ·