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 Einstein on Space: Understanding the Concept of Space in Relativity Theory
- ClamShell
- · Replies 8 ·
Graduate Can we use the Andromeda Paradox?
- alphawolf50
- · Replies 10 ·
Graduate What Are Riemann Normal Coordinates in General Relativity?
- Rasalhague
- · Replies 13 ·
Graduate What are the properties required for spacetime to be a Lorentzian manifold?
- mersecske
- · Replies 5 ·
Graduate Multiple clock thought experiment
- Diffused
- · Replies 14 ·
Graduate Understanding Mach's Principle: 2 Objects & Zero Observation
- mersecske
- · Replies 7 ·
Graduate BRS: Those Damnable Paradoxes I. Overview
- Chris Hillman
- · Replies 19 ·
Graduate Differing definitions of expansion, shear, and vorticity
- bcrowell
- · Replies 3 ·
Graduate Structure of a gravitational wave?
- ClamShell
- · Replies 3 ·
Graduate Length Contraction and Relativity: Muon Velocity & Gamma Factor
- RK1992
- · Replies 20 ·
Graduate Acceleration and Time Dilation
- timetravel_0
- · Replies 9 ·
Graduate Energy vs wavelength for a photon in GR
- Pierre007080
- · Replies 5 ·
Graduate Negative squares using the space time interval invariance
- ersteller
- · Replies 11 ·
Graduate Lorentz vs space time interval
- ersteller
- · Replies 4 ·
Graduate Can GR accurately predict the speed of gravity waves as c?
- cheungyl
- · Replies 7 ·
Graduate Basic question about the nature of light and time
- ZirkMan
- · Replies 5 ·
Graduate Question about alpha, the fine structure constant
- Rebound
- · Replies 7 ·
Graduate BRS: Some Recent GTR-Related arXiv Eprints
- Chris Hillman
- · Replies 4 ·
High School Is Time Travel Possible and How Can We Achieve It?
- Jadaav
- · Replies 46 ·
Graduate Special Relativity: Going from A to B on a helix
- Passionflower
- · Replies 41 ·
Undergrad Speed of Light: Time and Motion Explained
- Worzel
- · Replies 11 ·
Graduate Conservation of energy predict invariance of elastic collisions?
- wumple
- · Replies 2 ·
Graduate Spin Counter: Can a train's length really dilate?
- James S Saint
- · Replies 26 ·
Graduate Information transfer that is faster than c?
- Puma24
- · Replies 4 ·
Graduate Can Relativity and Gravity Coexist?
- granpa
- · Replies 2 ·
Graduate Does Spin Affect Gravity at the Particle Level?
- gonegahgah
- · Replies 6 ·
Graduate Counting independent components
- haushofer
- · Replies 1 ·
Graduate Speed of light in Non-Inertial reference frame?
- Jonnyb42
- · Replies 3 ·
Graduate I understand time dilation with light clocks, but
- KarlRixon
- · Replies 15 ·
Undergrad Beginner's questions on time dilation
- DarkMalice
- · Replies 2 ·
Graduate Tipler Cylinders: Solving for Light Cone Tilt Angle
- edgepflow
- · Replies 2 ·
Graduate Calculating Apparent Speeds of Objects at Light Speed
- you878
- · Replies 3 ·
Graduate What Causes Time Dilation in Accelerated Systems Compared to Inertial Systems?
- Austin0
- · Replies 6 ·
Graduate Special relativity on a circle
- Tac-Tics
- · Replies 1 ·
Graduate What are the main paradoxes in Special Relativity?
- koorosh.shahd
- · Replies 11 ·
Graduate Center of Mass in Special Relativity: Observer Dependence?
- Dmitry67
- · Replies 5 ·
Graduate Two travelers both in Inertial Frames
- yogi
- · Replies 16 ·
Undergrad A question that has been plaguing me
- TFAccidents
- · Replies 5 ·
Graduate Why is the speed of light fixed while everything else is relative?
- AlecsSmart
- · Replies 16 ·
Graduate Real Inertial Motion: A Discussion of Frame Independence
- Austin0
- · Replies 3 ·
Graduate Unraveling the Mysteries of Muon Experiments
- psmitty
- · Replies 1 ·
High School Experimental data in relativity
- RK1992
- · Replies 3 ·
Graduate Is Time-Reversal Symmetry Valid in Curved Spacetime?
- birulami
- · Replies 3 ·
Graduate Magnetic Monopoles and Gravity
- Anamitra
- · Replies 16 ·
Graduate Speed of light & streaming video
- tanzanos
- · Replies 3 ·
Graduate Momentum of photon close the sun or black hole
- exponent137
- · Replies 37 ·
Undergrad Quick question - has length contraction actually been experimentally confirmed?
- jeebs
- · Replies 49 ·
Graduate Conservation laws in GR: a messy picture?
- bcrowell
- · Replies 9 ·
Graduate Relativity query - communication with an object at light speed
- lloydnoise
- · Replies 20 ·
Graduate Confused about time slowing down
- MrXavia
- · Replies 34 ·
Undergrad Paradox: Who Will Be the Oldest After Travelling Near Light Speed?
- Minatory
- · Replies 1 ·
Graduate Spacetime / Time Dilation Question
- rede96
- · Replies 24 ·
Graduate How should we convey curved space-time?
- Vast
- · Replies 23 ·
Graduate Planck relation, relativistic doppler effect, and relativistic mass
- alphawolf50
- · Replies 4 ·
Graduate Alternative form of Minkowski metric?
- stanleyfapps
- · Replies 2 ·
Graduate Reference Frames in Simultaneity
- am2010
- · Replies 3 ·
Graduate Travelling greater than speed of light
- ABHISEK DATTA
- · Replies 5 ·
Undergrad Questions about lights constant and photons
- snackster17
- · Replies 3 ·
Graduate Is Time Constant? Why We Assume It Is
- larrym3
- · Replies 3 ·
Graduate Potentials, connections and curvature
- Orbb
- · Replies 14 ·
Graduate Understanding GR Vacuum Solutions: Explaining the Role of Matter in Curvature
- TrickyDicky
- · Replies 6 ·
Graduate Gravity (over extremely long distances)
- jspstorm
- · Replies 57 ·
Graduate Question about length contraction (geometric way)
- Yondaime5685
- · Replies 11 ·
Graduate Energy loss of a photon moving against gravity
- TriKri
- · Replies 55 ·
Graduate Frames vs Lines of Simultaneity
- Austin0
- · Replies 58 ·
Graduate Are accelerating lines of simultaneity correct?
- Austin0
- · Replies 59 ·
Graduate Rookie Energy Query: Mass Outflow in Supernovas
- mooneyes
- · Replies 6 ·
Graduate Resolve to the Twins Paradox – Frame of Origin
- James S Saint
- · Replies 28 ·
Graduate Are the doppler effects of sound wave and light wave of different roots?
- wdlang
- · Replies 2 ·
Graduate If distance and time can change then how can c be constant?
- ChristianKing
- · Replies 3 ·
Graduate Relative Simultaneity and Electrodynamics: Lorentz Maths
- Austin0
- · Replies 7 ·
Graduate Why is the speed of light independent of the source?
- ravisastry
- · Replies 17 ·
Graduate Why does the second term disappear in the tangent vector equation?
- Living_Dog
- · Replies 4 ·
Graduate How can radar data be used to calculate acceleration?
- Passionflower
- · Replies 23 ·
Graduate Is the Radius of the Universe Measured by Redshift or Distance?
- jensel
- · Replies 7 ·
Graduate Understanding the Constant Speed of Light: Mathematical and Logical Explanations
- Alex_Sanders
- · Replies 24 ·
High School Is Your Thumb a Miniature Gravitational Lens?
- timetravel_0
- · Replies 3 ·
Graduate Reference book for gravitational force
- praveenpp
- · Replies 4 ·
Graduate Rindler coordinates introduction
- mglaros
- · Replies 6 ·
Graduate Calculating Proper Acceleration at Bottom of a Half Light-Year Rocket
- idcavili
- · Replies 1 ·
Graduate How are the twins distinguished?
- narps
- · Replies 142 ·
Graduate The main obstacle in learning relativity related theories
- wdlang
- · Replies 13 ·
Graduate Orthogonal diretion on the Minkowski diagram
- mersecske
- · Replies 2 ·
Graduate John Moffat's STVGravity: Recognition by Physics Community?
- Kevin_Axion
- · Replies 2 ·
Graduate Can Every Spherically Symmetric Spacetime Be Represented by a Penrose Diagram?
- mersecske
- · Replies 31 ·
Graduate Revisiting the Flaws of the Light Clock in Special and General Relativity
- gnomechompsky
- · Replies 209 ·
Graduate Is There Evidence for the Existence of an Anti Black Hole?
- taylaron
- · Replies 10 ·
Graduate Atomic Level Time Dilation Resources
- rhyshanan
- · Replies 10 ·
Graduate Particle-like Solutions of Einstein Equation: Definition
- faulerhund
- · Replies 1 ·
Graduate Joe's confusion about contraction and direct product explained.
- Living_Dog
- · Replies 4 ·
Graduate Spherically symmetric metric form
- mersecske
- · Replies 14 ·
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 Energy and Mass: What Happens to Energy in Relativity Theory?
- PhizzicsPhan
- · Replies 49 ·
Graduate Conformal group -> Poincaré group
- Petr Mugver
- · Replies 13 ·
Graduate Time dilation due to relative velocity
- barnesbb
- · Replies 6 ·