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
High School Why would Earth move in straight line without sun's gravity?
- avito009
- · Replies 3 ·
Graduate Detecting Gravity Waves: An Exploration of Using Them for Communication
- hddd123456789
- · Replies 2 ·
Graduate Gauss - Bonnet Gravity -> Curvature variations
- Breo
- · Replies 35 ·
Graduate The modelling of space time through Riemann tensor calculus
- aditya ver.2.0
- · Replies 3 ·
Graduate Does Length Contraction Imply Superluminal Speeds?
- Fantasist
- · Replies 19 ·
Graduate Was Einstein lucky when not considering twin paradox as paradox?
- adoion
- · Replies 151 ·
Graduate Doubt: Why Quadratic in Matrix but Power 4 in Einstein-Rosen Metric?
- Breo
- · Replies 1 ·
Graduate What Causes the Unexpected Limit in Rindler Horizon Calculations?
- Mentz114
- · Replies 21 ·
Graduate Difficulty in understanding the notation
- PhyAmateur
- · Replies 3 ·
Graduate Why Does General Relativity Use Coordinate Systems?
- zeromodz
- · Replies 2 ·
Graduate Light reflection in length contracted system
- Ookke
- · Replies 11 ·
Graduate Difference Between Natario & Alcubierre Warp Drives
- JonnyMaddox
- · Replies 2 ·
Undergrad Length contracting between objects
- member 529879
- · Replies 8 ·
Undergrad Time dilation -- light clock on a train thought experiment
- DAC
- · Replies 9 ·
Graduate Quantum Tunneling: Can Photons Escape Black Holes?
- Tom Phillippe
- · Replies 3 ·
Graduate Disk rotating in a gravitational field, like a clock
- Karl Coryat
- · Replies 13 ·
Graduate Can Going the Speed of Light Create Waste in a Vacuum?
- DaveDem
- · Replies 11 ·
Undergrad Why Can't Objects Accelerate to Light Speed?
- trigonatus
- · Replies 5 ·
Graduate What Happens to a Baseball Thrown from a Light Speed Ship?
- parkland
- · Replies 6 ·
Graduate Spacetime: How It Is One & How It Moves
- rajeshmarndi
- · Replies 19 ·
Graduate What is the Significance of 4-Velocity in Special Relativity?
- DiracPool
- · Replies 1 ·
Undergrad Speed of Light & Red Shift: My Understanding
- TerryHM
- · Replies 3 ·
Graduate Light Speed Photon: Everywhere at Once?
- Tom Phillippe
- · Replies 1 ·
Graduate Big Bang: Spacetime Created in 1 Sec
- TerryHM
- · Replies 1 ·
Undergrad Understanding Einstein's Theory of Relativity: Laser Technique Questions
- Manfredthethird
- · Replies 7 ·
Graduate Distinguishing Special Relativity from Classical Mechanics
- Strilanc
- · Replies 13 ·
Graduate An atomic clock and a normal clock
- Galileo Galilei
- · Replies 9 ·
Graduate Problem with a piece of calculation
- ShayanJ
- · Replies 4 ·
Graduate Mass Inflation in BH: A Depreciated Concept?
- tzimie
- · Replies 1 ·
Graduate Is the speed of light truly constant?
- rmoh13
- · Replies 7 ·
Graduate Help with Lorentz Transformation Notation & Matrix Entries
- grzz
- · Replies 5 ·
Graduate Gravity: Examining Force, Magnitude, & Limitations
- Eric Hentschel
- · Replies 15 ·
Graduate Time Real or Not? - Arguments For & Against
- trevor white
- · Replies 6 ·
Graduate Length contraction of particles
- member 529879
- · Replies 2 ·
High School I have a dumb question about gravitational fields
- Dimwitted
- · Replies 2 ·
High School Can Meeting Your Future Self Create a Time Loop?
- AdityaDev
- · Replies 6 ·
Graduate Free fall into BH and horizons
- tzimie
- · Replies 20 ·
Graduate Evidence for Variable Speed of Gravity in Coordinate Spacetime
- Thinkor
- · Replies 6 ·
Graduate What Are the Dimensions of Energy and Matter in Physics?
- Eric Hentschel
- · Replies 1 ·
Graduate Can g_00 of the metric tensor depend on time
- birulami
- · Replies 14 ·
Graduate Explaining the Paradox of Measuring Photons from the Sun
- jbmolineux
- · Replies 9 ·
Graduate Travel 10x the Speed of Light: Warp Drive Explained
- ANarwhal
- · Replies 55 ·
Graduate Gravitational red- or rather blue-shift when approaching Schwarzschild radius
- birulami
- · Replies 4 ·
Graduate Where should I ask about mathematical problems with Riemann curvature tensor
- aditya ver.2.0
- · Replies 5 ·
Graduate Can a photon truly slow down in a dense medium?
- sunrah
- · Replies 12 ·
Graduate Non-Dimensional Accretion Rate λ: Overview and Questions
- Vrbic
- · Replies 7 ·
Graduate Black Hole/Entanglement Question
- Gaz1982
- · Replies 18 ·
Graduate Slow Motion Observed in SR Spaceships?
- alackofcolor
- · Replies 7 ·
Graduate Invariance of the speed of light
- DAC
- · Replies 18 ·
Graduate 4-velocity of an observed object in GRT
- birulami
- · Replies 2 ·
Graduate Can light experience Gravity assist?
- sciencegem
- · Replies 8 ·
Graduate Physical interpretation of the stress energy momentum tensor
- space-time
- · Replies 4 ·
Graduate Could the Twin Paradox in GR be Generalized to Completely Empty Space?
- dman12
- · Replies 21 ·
Graduate Acceleration-free twin paradox
- jethomas3182
- · Replies 35 ·
Graduate Does gravity have a similar effect on energy as it does with time?
- mcjosep
- · Replies 7 ·
Graduate Time dilation through velocity of a moving body
- aditya ver.2.0
- · Replies 2 ·
Graduate Geodesic quation coordinate time
- Svendsen
- · Replies 3 ·
Graduate By what method did Einstein derived his gravitational field equation?
- DOTDO
- · Replies 8 ·
Undergrad Can Numerical Simulations Accurately Predict Orbital Precession?
- oq123
- · Replies 5 ·
Graduate Can a black hole slow down time and create a time difference between observers?
- IgorM101
- · Replies 2 ·
Graduate Acceleration and the twin paradox
- DiracPool
- · Replies 172 ·
Undergrad Twin Paradox: Which Twin is Older?
- virgil elings
- · Replies 18 ·
Graduate LIGO & GRB 070201 - Ruling Out a Neutron Star Merger
- ShayanJ
- · Replies 2 ·
Graduate Gravity's Effect on Space: Length Contraction & Light Speed
- Akshar Tandon
- · Replies 2 ·
Graduate Understanding Proper Time & Equations
- zwoodrow
- · Replies 1 ·
Undergrad Gravitational Time and Length Change, Looking for mass formula
- mcjosep
- · Replies 5 ·
Graduate Question about Gravity and curvature of space time
- Christine88
- · Replies 95 ·
Graduate Time Dilation Notation in SR: Clarifying the Differential Form
- connorp
- · Replies 2 ·
Graduate What Role Do Particles Play in Understanding Planck Scales in Quantum Gravity?
- victorvmotti
- · Replies 2 ·
Graduate What is the real impact of speed on time in the theory of time dilation?
- Redneck-65
- · Replies 31 ·
Graduate Does Relativity Support the Masslessness of Photons?
- jerromyjon
- · Replies 3 ·
Graduate Can Jensen Receive Same-Time Signals from Sensors?
- Hernik
- · Replies 3 ·
Graduate Help Make Math Connect in General Relativity
- space-time
- · Replies 1 ·
Graduate Length Contraction of Electrons
- member 529879
- · Replies 6 ·
High School Why does time slow down and the train compress in relativity?
- DaCouchPutater
- · Replies 6 ·
Graduate GR vs SR: Reconciling Contravariant & Covariant Vector Components
- nigelscott
- · Replies 2 ·
Graduate Raychoudhuri's Equation in Abstract Notation
- center o bass
- · Replies 1 ·
Undergrad Special Relativity Time Dilation Santa question
- applestrudle
- · Replies 4 ·
Graduate General solution to the wave equation of electromagnetic field
- victorvmotti
- · Replies 3 ·
Graduate Observing black holes inside black holes
- l0st
- · Replies 19 ·
Graduate Crossing the Event Horizon: Observing a Massive Black Hole
- JollyOlly
- · Replies 6 ·
Graduate Why does mass affect space time?
- thetexan
- · Replies 2 ·
Graduate Does an electron emit radiation when falling towards Earth?
- CKH
- · Replies 3 ·
Undergrad Time Dilation: Layperson Question About Gravity's Effect on Time
- Graham2
- · Replies 4 ·
Graduate E=mc^2 Proof: Is it OK? - Adam Aulton
- Redstart
- · Replies 1 ·
Graduate Black Holes & Particle Collisions: Does Linear Momentum Transfer?
- apamirRogue
- · Replies 1 ·
Graduate Which Local Coordinates Are Best Suited for Different Problems and Applications?
- m4r35n357
- · Replies 4 ·
Graduate Einstein's Theory of Relativity
- AJ Allen
- · Replies 13 ·
Graduate Find Null Paths in Differentiable Manifolds Using One-Forms
- victorvmotti
- · Replies 1 ·
Graduate Doppler Effect and Conservation of Energy
- bgq
- · Replies 26 ·
Graduate Topology of Relativity: Implications of Niels Bohr's Arguments
- victorvmotti
- · Replies 1 ·
Graduate The (non-?) flatness of a uniform gravitational field and the equivalence principle
- Peter Pijl
- · Replies 12 ·
Undergrad Can Time Be a Dimension If It's Just a Human Construct?
- MichaelH
- · Replies 5 ·
Graduate Non-rotational and rotational metric tensors
- Orion1
- · Replies 3 ·
Graduate Schwarzschild Spacetime: Ellipsoidal for Moving Observers?
- center o bass
- · Replies 3 ·
Graduate Time Dilation Effect on High-Speed Object Orbiting Massive Object
- Pro7ech
- · Replies 5 ·
Graduate STR removes the possibility of a common present
- gamow99
- · Replies 20 ·
Undergrad Speed of Light: What Frame of Reference?
- mrnike992
- · Replies 8 ·
Graduate How Does the Observer's Perspective Resolve the Twin Paradox?
- dynawics
- · Replies 18 ·
Graduate Has a real clock corrections, with respect to an ideal clock?
- ORF
- · Replies 29 ·