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
Undergrad Different definitions of differential forms in general relativity
- kent davidge
- · Replies 3 ·
High School Measurements within our solar system with relativity in mind
- hsdrop
- · Replies 15 ·
Graduate Physical interpretation of Pauli-Lubanski pseudo-vector
- spaghetti3451
- · Replies 1 ·
High School Can objects exceed c relative to us in Hubble flow?
- Stephanus
- · Replies 26 ·
Graduate Transfer Momentum Along Axis by Torque: Special Relativity Analysis
- Jonathan Scott
- · Replies 9 ·
High School The moon and light that bends around it
- hsdrop
- · Replies 4 ·
Graduate Does the Penrose process violate the Hawking area theorem?
- Sumarna
- · Replies 6 ·
Undergrad Index Notation, Covector Transform Matrix Rep
- binbagsss
- · Replies 6 ·
High School Measuring Rest Length While Moving
- phyti
- · Replies 2 ·
Undergrad GR: How Much Mechanics is Involved?
- vector
- · Replies 6 ·
Insights General Relativity as a Gauge Theory - Comments
- haushofer
- · Replies 23 ·
High School Why is there a limit to the speed of light in special relativity?
- MarSuper
- · Replies 29 ·
Undergrad Theoretical problem with an empty seat going faster than light
- conquest
- · Replies 21 ·
Undergrad Geodesics on S2 Surface: Arc-Length Parametrisation
- Frank Castle
- · Replies 1 ·
High School Is there a limit to how much spacetime can warp?
- IvicaPhysics
- · Replies 1 ·
Graduate Does Non-Uniform Gravity Transform E into B Fields?
- Twigg
- · Replies 9 ·
Undergrad Length contraction vs expansion
- freshman2013
- · Replies 9 ·
Undergrad On the invariant speed of light being the upper speed limit
- Joker93
- · Replies 39 ·
High School Can Magnetic Fields Control Gravity?
- wolram
- · Replies 8 ·
Graduate Can Machian explanations of inertia work in an open, ever-expanding universe?
- e2m2a
- · Replies 5 ·
Undergrad Geodesics and affine parameterisation
- Frank Castle
- · Replies 16 ·
Undergrad How do gravitational wave energy and amplitude change with distance?
- Meerio
- · Replies 7 ·
Undergrad Differential Forms in GR: Higher Order Derivatives
- kent davidge
- · Replies 5 ·
Graduate Color of Deep Space: Distribution of Light Wavelengths
- Barnak
- · Replies 2 ·
Undergrad Why is proper time undefined for spacelike/lightlike paths?
- Frank Castle
- · Replies 17 ·
High School Measuring c from Earth: Is the Speed of Light Affected?
- jahrudz
- · Replies 5 ·
Undergrad Why don't general relativity and quantum physics agree?
- victorhugo
- · Replies 16 ·
Undergrad Relativistic Effect on Attraction between Moving Masses?
- ObjectivelyRational
- · Replies 4 ·
High School Why Contraction in Relativity Theory?
- gamb
- · Replies 18 ·
Undergrad Can Time Be Frozen and Plotted in 3D Space?
- calinvass
- · Replies 6 ·
Undergrad Why does the wave equation keep F instead of F' under Lorentz boost?
- greswd
- · Replies 16 ·
Undergrad Applicability of E and B field Transformations
- tade
- · Replies 28 ·
Undergrad What does Pt mean in this formula?
- Meerio
- · Replies 1 ·
Graduate Generalisation of Maxwell's equations
- spaghetti3451
- · Replies 1 ·
Undergrad Discrepancy in Co-Moving Charges Magnetic Force?
- greswd
- · Replies 45 ·
High School Would FTL radiation from dark matter violate relativity?
- Ontophobe
- · Replies 1 ·
Undergrad SR Doppler Effect: Differences in Wave VS Momentum Models
- tade
- · Replies 36 ·
Undergrad Calculating cumulative periastron time shift from relativistic orbital decay
- Meerio
- · Replies 2 ·
Undergrad Proper Distance Between Surfaces of Constant R in Curved Spacetime
- timmdeeg
- · Replies 8 ·
High School Flashlights and Guns inside an Event Horizon
- Glurth
- · Replies 24 ·
Undergrad Understand Michelson-Morley Experiment from Feynman Lectures
- Bishamonten
- · Replies 4 ·
High School Question concerning mass effect
- Asad Raza
- · Replies 1 ·
High School How Thin Can Speed Make Things? 2D Possibilities
- hsdrop
- · Replies 3 ·
High School What Happens Inside the Event Horizon of a Black Hole?
- Stephanus
- · Replies 3 ·
Undergrad Relativistic Explanation for the Unipolar Generator
- Jdo300
- · Replies 18 ·
High School Relativistic Simulation of Charged Particles: How a Physicist Would Go About It
- Jeronimus
- · Replies 4 ·
Undergrad Is Symmetry on μ and α Valid for the Derivative of the Metric Tensor?
- kent davidge
- · Replies 5 ·
High School Does time dilation work this way?
- Prem1998
- · Replies 26 ·
Undergrad Definition and measurement of proper length
- Frank Castle
- · Replies 23 ·
Undergrad Relativistic rocket - where is the relativistic mass?
- spica
- · Replies 11 ·
Undergrad Stress Energy Tensor for Oscillator: Setup for Electron in E-Field
- Devin
- · Replies 4 ·
High School Why does time dilation make tA>tB if time slows for A?
- Faiq
- · Replies 74 ·
Undergrad Why y=y' in the Lorentz transformation?
- Johnls
- · Replies 27 ·
High School Simultaneity: Shroedinger's Cat and Exploding Balloons
- michall
- · Replies 5 ·
Undergrad Why kinetic energy depends on reference frame for relativistic speeds
- Wout Veltman
- · Replies 5 ·
Undergrad Frequency of GW Arm Length Change: Properties & Detailed Explanation
- Meerio
- · Replies 5 ·
Undergrad Finding the inverse metric g^αβ when g_αβ = η_αβ + h_αβ
- epovo
- · Replies 5 ·
Graduate Photon travel time quadratic equation in Weinberg p. 72
- Kostik
- · Replies 36 ·
High School Is the time dilation in GR equal to that in SR?
- Wasist
- · Replies 15 ·
Undergrad Special relativity timebomb on distant planet 'paradox'?
- Matternot
- · Replies 43 ·
Undergrad Why does a differential form require an antisymmetric tensor?
- kent davidge
- · Replies 15 ·
Undergrad How can gravitational waves be detected if spacetime itself warps?
- greypilgrim
- · Replies 14 ·
Undergrad Does superluminal messaging create a causality paradox?
- AdrianMay
- · Replies 11 ·
Undergrad What is the Simpler Name for Conserved Property of Spacetime?
- KetilT
- · Replies 3 ·
High School Gravity and electromagnetic radiation
- Justintruth
- · Replies 3 ·
Undergrad Trying to understand covariant tensor
- member 606890
- · Replies 5 ·
Undergrad Which clock runs slower: planet or probe in a closed universe?
- calinvass
- · Replies 38 ·
Undergrad How does matter clump to form stars and galaxies in general relativity?
- Frank Castle
- · Replies 10 ·
Graduate Physical Relevance of Singularity Theorems?
- strangerep
- · Replies 4 ·
High School Can Black Holes Really Allow Time Travel and Survival Beyond the Event Horizon?
- Ali Abbas
- · Replies 2 ·
Undergrad Solving SR Invariance: Minkowski Metric, Poincare Transformation, Index Notation
- binbagsss
- · Replies 9 ·
High School FTL Gravity Waves: Is Faster-Than-Light Travel Possible?
- Ontophobe
- · Replies 3 ·
High School Dropping a Black Hole from Tower of Piza
- Ontophobe
- · Replies 3 ·
Undergrad Does the energy in cc also gravitate?
- kodama
- · Replies 12 ·
Graduate The information about the curvature on the rest
- Abel Cavaşi
- · Replies 23 ·
High School In what direction do gravitational waves get emitted?
- Meerio
- · Replies 3 ·
Undergrad Deriving Schwartzschild Finding Mistake in Ricci Tensor
- abccdef125
- · Replies 5 ·
Undergrad Can a Tensor be Represented by a 3-Dimensional Matrix?
- kent davidge
- · Replies 13 ·
Undergrad Where do the missing minutes in a live feed from a spaceship to Mars go?
- John_melb
- · Replies 10 ·
High School Does Acceleration Affect Planck Lengths in General Relativity?
- BenAS
- · Replies 3 ·
High School Can tidal forces distinguish gravity from acceleration?
- Ontophobe
- · Replies 8 ·
Graduate Did Einstein Disbelieve in General Relativity Geometry?
- poom
- · Replies 1 ·
Graduate Capture by Gravitational Radiation in 2-Body System?
- Yazzledore
- · Replies 6 ·
Undergrad Index algebra questions / order of indices
- binbagsss
- · Replies 22 ·
High School Age of Universe: How Gravity Affects Time
- pforeman
- · Replies 7 ·
Graduate Distance of two shells in Gullstrand-Painleve coordinates
- Sonderval
- · Replies 6 ·
Graduate Hubble parameter vs Scale factor's derivative
- Elnur Hajiyev
- · Replies 18 ·
High School Can Time Travel Take Us Back to the Big Bang?
- Aashish sarode
- · Replies 5 ·
High School What keeps a lone object stationary with nothing else in existence?
- Mohd Abdullah
- · Replies 25 ·
High School Why Can the Gamma Factor Exceed 2 in Relativity?
- NoahsArk
- · Replies 4 ·
Undergrad Does the Michelson-Morley Experiment Solely Confirm Constant Light Speed?
- LSMOG
- · Replies 7 ·
High School How does the universe expand with the law of thermodynamic
- Ekue Kpodar
- · Replies 8 ·
High School Does antimatter experience gravity differently from matter?
- Stephanus
- · Replies 2 ·
Undergrad Questions about binding energy
- SiennaTheGr8
- · Replies 11 ·
High School Can Newton's G and the "Einstein Scalar" Be Related?
- kent davidge
- · Replies 3 ·
High School How Does the Michelson-Morley Experiment Detect Differences in Light Speed?
- LSMOG
- · Replies 7 ·
Graduate Relativistic generalization of Newton’s equation
- Zak
- · Replies 5 ·
Undergrad Does Special Relativity Apply to a Moving Clock?
- Kunhee
- · Replies 6 ·
Undergrad How does parallel transportation relates to Rieman Manifold?
- TimeRip496
- · Replies 9 ·
Undergrad Dimensionless Time: Rindler & Minkowski Spacetime
- felici95
- · Replies 1 ·