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 Show Spherical Symmetry of Schwarzschild Metric
- mjordan2nd
- · Replies 3 ·
High School How Can Time Derivatives Be Taken in GR and SR with Orthogonal Basis Vectors?
- davidge
- · Replies 29 ·
High School DeltaT of clocks at endpoints of a rocket post acceleration
- Jeronimus
- · Replies 24 ·
High School Visualizing GR Geometry: Software for Einstein Field Equations
- mieral
- · Replies 3 ·
Undergrad "General Relativity" by Wald -- question
- Felix Quintana
- · Replies 7 ·
Undergrad Why exponentiate infinitesimal transformations instead of summing them
- TimeRip496
- · Replies 23 ·
Undergrad Force applied by a moving object
- Ibix
- · Replies 7 ·
High School Why should spacetime/manifold be smooth?
- mieral
- · Replies 23 ·
Undergrad Gravity: Contraction of Space?
- mpolo
- · Replies 2 ·
High School Spacetime same size during Big Bang up to now?
- mieral
- · Replies 3 ·
High School Why differentiate γ when deriving relativistic force in the particle's frame
- physics user1
- · Replies 15 ·
High School GR vs quantum vacuum Lorentz invariance
- mieral
- · Replies 3 ·
High School Why does general relativity need quantization if gravity is not a force?
- Ostrados
- · Replies 7 ·
High School Michelson-Morley Exp: Surprise of Result
- Paulo Figueiredo
- · Replies 8 ·
Graduate Finding geodesics using the squared Lagrangian
- ShayanJ
- · Replies 8 ·
High School Einstein relativity is invalid
- Spikemarlene
- · Replies 3 ·
High School Alien Perception of Time: Can Time Go Backwards?
- puzzled fish
- · Replies 3 ·
Undergrad Relativistic charged particle in a constant uniform electric field
- notdroid
- · Replies 3 ·
Graduate Alien Perception of Time - Can Time Go Backwards?
- puzzled fish
- · Replies 5 ·
High School Time Dilation, Interstellar Travel, and "The Forever War"
- hawi
- · Replies 3 ·
High School Is Lorentz contraction explained by space time diagram ?
- sweet springs
- · Replies 12 ·
High School Why do both observers see the other's clock slow down in special relativity?
- Dimani4
- · Replies 7 ·
Undergrad Consequences of Rotating Objects C on Coil A Frequency
- AAB1994
- · Replies 2 ·
Undergrad Error in Lorentz Invariant Integration
- Demystifier
- · Replies 7 ·
High School What Would Happen in a Universe with Negative Curvature of Spacetime?
- mieral
- · Replies 36 ·
High School Relative Speed of 2 Beam Lights: Is it C or Zero?
- sayf alawneh
- · Replies 6 ·
Graduate Are hypermomentum and Belinfante-Rosenfeld the same object?
- mhob
- · Replies 2 ·
High School What if gravity wasn't geometry—would conservation laws still hold?
- mieral
- · Replies 11 ·
High School Does gravity change the permittivity/ permeability of vacuum?
- calinvass
- · Replies 6 ·
High School The Relationship Between Gravity and Time
- Thomas Clark
- · Replies 3 ·
Graduate Do inertial frames in GR definition correspond to Lorentz transforms in SR?
- Cristian Paris
- · Replies 8 ·
High School What is the Correct Method for Deriving p = γmv?
- physics user1
- · Replies 2 ·
Undergrad Farthest distance a human can travel from Earth in a life
- James Horner
- · Replies 21 ·
Graduate Find the determinant of the metric on some graph
- Jonsson
- · Replies 3 ·
Undergrad How do contracted and proper lengths reconcile across reference frames?
- jonjacson
- · Replies 7 ·
High School Can relativistic Doppler effect measure velocity and direction in space?
- Chris Miller
- · Replies 19 ·
Undergrad Tidal forces on a spring-mass system
- FallenApple
- · Replies 27 ·
Undergrad Does the Schwarzschild metric maximize proper time for the correct acceleration?
- Spinnor
- · Replies 7 ·
High School Do all physical bodies warp spacetime, even tiny ones?
- Aikiman007
- · Replies 3 ·
High School Light Bending on Single Point: What Happens?
- Uzbar Zibil Tarag
- · Replies 4 ·
Undergrad What are the 2D Translational Killing Vectors in Polar Coordinates?
- davidge
- · Replies 21 ·
High School Mass-Energy Equivalence: Does E=mc2 Apply in Systems at Rest?
- simeonz
- · Replies 2 ·
Undergrad Shining a light beam back -- relativity
- Invutil
- · Replies 28 ·
Undergrad Is it really possible that relativistic mass tends to reach infinity?
- Thalooth Bin Khalid
- · Replies 21 ·
Undergrad Why crossing an event horizon feels unremarkable from inside
- Grinkle
- · Replies 15 ·
High School What is the mathematical expression for manifold duplication in Many Worlds?
- mieral
- · Replies 4 ·
Undergrad The Shapiro delay and falling into a black hole
- Zan24C
- · Replies 35 ·
Undergrad Q re equilibrium energy relationships for a mixture
- Buzz Bloom
- · Replies 2 ·
Undergrad Does electric field intensity change in a moving reference frame?
- jonjacson
- · Replies 2 ·
High School What is the evidence that there is gravitation?
- Intikam the ruthless
- · Replies 13 ·
High School What is the difference between the two 4-momenta in photon-electron collisions?
- AishaGirl
- · Replies 7 ·
Undergrad How Does the Rain Frame Affect Perception of a Ball Falling Off a Cliff?
- FallenApple
- · Replies 3 ·
Undergrad Why does the Lorentz transformation use t' instead of t?
- physics user1
- · Replies 1 ·
Graduate Where is Potential Curvature Stored in GR?
- Thinkor
- · Replies 9 ·
High School Limitations of Light Speed and Detecting Black Hole Collisions in the Universe
- mieral
- · Replies 1 ·
Undergrad Time Dilation: Hafele-Keating Experiments
- Maaruk
- · Replies 7 ·
High School LIGO: Detecting Gravity Wave Sources
- entrance
- · Replies 6 ·
High School Why does gravity pull objects toward Earth according to Einstein?
- Shubham Raj22
- · Replies 8 ·
Undergrad Alcubierre Warp Drive: Arrival Problem - Fact or Fiction?
- OrigamiNinja
- · Replies 7 ·
High School Mass of a capacitor plate
- jartsa
- · Replies 25 ·
High School How Do Proper Acceleration and Gravity Affect Time Dilation in Free Fall Orbits?
- name123
- · Replies 87 ·
Undergrad Average Luminosity of Moving Body: A Relativistic Analysis
- Tahmeed
- · Replies 1 ·
Undergrad Disproving Velocity's Effect on Space-Time
- stevedgarcia
- · Replies 1 ·
Undergrad Change of special relativity formulas?
- Tahmeed
- · Replies 11 ·
Undergrad Path of Light in Curved Spacetime with Metric g
- Tahmeed
- · Replies 3 ·
High School Does a moving bar magnet create charges?
- ealbers
- · Replies 15 ·
High School Raisin bread model of space-time
- jordankonisky
- · Replies 33 ·
Undergrad Riemann tensor in 3d Cartesian coordinates
- davidge
- · Replies 96 ·
Undergrad Is Time Merely the Progression of Energy Toward Equilibrium?
- Andy_K
- · Replies 3 ·
Graduate Flat s-t 4d killing vectors via solving killing equation
- binbagsss
- · Replies 31 ·
Undergrad Test of Special Relativity Confirmed - ScienceMag.org
- sander69
- · Replies 9 ·
Undergrad Momentum flux and the stress tensor in uniaxial stress
- Sonderval
- · Replies 23 ·
Undergrad Is Hubble's law valid in curved spacetime Friedman models?
- Tahmeed
- · Replies 1 ·
High School Why do I see EM radiation from an electron when hopping but my stationary partner doesn't?
- ealbers
- · Replies 13 ·
Graduate Can Alcubierre warp drive geometry avoid Hawking radiation?
- shawneric
- · Replies 11 ·
High School Rethinking Gravity: The Reality of General Relativity and Spacetime Curvature
- mieral
- · Replies 4 ·
Undergrad Lorentz group, boost and indices
- TimeRip496
- · Replies 11 ·
High School Measuring relativistic effects in a single frame
- BitWiz
- · Replies 26 ·
Undergrad Is the mass defect still considered with invariant mass?
- albertrichardf
- · Replies 30 ·
High School "Newton's space is the gravitational field"?
- mieral
- · Replies 3 ·
Undergrad "relativistic mass" still a no-no?
- nomadreid
- · Replies 95 ·
Graduate Einstein's Clock: See What at Speed of Light?
- John S
- · Replies 2 ·
Undergrad Where the scale factor a(t) appears in the metric
- Corrado Campisano
- · Replies 10 ·
Undergrad Different methods of deriving the energy-momentum equation
- albertrichardf
- · Replies 28 ·
Undergrad Vectors and isometries on a manifold
- davidge
- · Replies 83 ·
Undergrad Why does photon energy increase when falling into a gravitational field?
- calinvass
- · Replies 3 ·
High School What is the relationship between time, speed, and mass of a photon?
- shihab-kol
- · Replies 14 ·
Graduate Geodesics of AdS3: Find a Reference
- ShayanJ
- · Replies 3 ·
Undergrad Special relativity and sameness
- Bartolomeo
- · Replies 42 ·
Undergrad Interpreting initial data for a null geodesic with affine parameter
- binbagsss
- · Replies 3 ·
High School Gravity and the curvature of space
- Brunolem33
- · Replies 15 ·
High School Why Didn't Einstein Apply the Gamma Factor in the EPR Paradox?
- Old Chinaman
- · Replies 3 ·
Undergrad The space-time interval definition in special relativity
- albertrichardf
- · Replies 5 ·
Graduate What is the Relativistic Origin of the Charge-to-Mass Ratio in Electrons?
- hcl
- · Replies 4 ·
High School GR lacks absolute space, but what is absolute space?
- name123
- · Replies 10 ·
High School Does the charge have a relativistic origin?
- hcl
- · Replies 7 ·
Undergrad Is the Interior of a Black Hole a Space-Like Region Beyond the Horizon?
- LarryS
- · Replies 4 ·
Graduate Information Paradox for Unruh Radiation?
- stevendaryl
- · Replies 26 ·
Undergrad Any progress on realistic rotating black holes?
- tzimie
- · Replies 6 ·
High School GR interpretation of a scenario
- name123
- · Replies 56 ·