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 Bitensor covariant derivative commutation
- PLuz
- · Replies 1 ·
Graduate Relativistic maxwell-boltzmann-distribution
- magicfountain
- · Replies 4 ·
Graduate Stereographic projection in de Sitter cosmological model
- ahmad2l
- · Replies 2 ·
Graduate Why is light perpendicular to the other frame's velocity in time dilation derivations?
- tomz
- · Replies 1 ·
High School Is Time Really the Fourth Dimension?
- superbk
- · Replies 3 ·
Graduate Finding znew for Covariant Conservation
- gentleboy
- · Replies 2 ·
Graduate Retarded Green Function in Curved Spacetime
- PLuz
- · Replies 9 ·
Graduate 2 approaching objects at velocity
- Ferraridude
- · Replies 23 ·
Undergrad What counts as a local landmark in general relativity?
- codeman_nz
- · Replies 1 ·
Undergrad How Does Mass-Energy Equivalence Relate to Gravity?
- letsfailsafe
- · Replies 10 ·
Graduate How to derive the Lense-Thirring metric from Einstein's field equations
- mysearch
- · Replies 4 ·
Graduate How does relativity explain inertia
- brupenney
- · Replies 17 ·
Graduate Two dimensional manifold are conformally flat
- paweld
- · Replies 2 ·
Graduate Einstein's Equations in Dimension 4
- Airsteve0
- · Replies 18 ·
Graduate Can the BTZ Black Hole Solutions Be Valid with Different Cosmological Constants?
- erasrot
- · Replies 4 ·
Graduate Time dilation around a planet.
- cragar
- · Replies 6 ·
Graduate Speed of light in an expanding universe
- Warp
- · Replies 5 ·
Graduate Why Does Kinetic Energy of Electron in Photoelectrics Follow Classical Approach?
- Azmodan
- · Replies 2 ·
Graduate Source tracelessness, divergencelessness at invariant speed
- EagleH
- · Replies 2 ·
Graduate Components of Einstein's Equations in 4 dimensions
- Airsteve0
- · Replies 8 ·
Graduate Gravitational and movement related time dilation
- serp777
- · Replies 1 ·
Graduate How is proper acceleration defined?
- OMFG Clown
- · Replies 2 ·
Graduate Moving equal to or faster than c
- QwertyXP
- · Replies 1 ·
Graduate Why does a GPS satellite clock run faster than Earth clocks?
- SciencePF
- · Replies 27 ·
Graduate Coordinate-free special relativity
- dEdt
- · Replies 15 ·
Graduate Who Measures Proper Time Interval in Astronaut Problem?
- IWantToLearn
- · Replies 3 ·
Undergrad Spatial separation between events with different time intervals
- sealsix14
- · Replies 3 ·
Graduate Hawking Time Travel Experiment
- LuckyNate
- · Replies 11 ·
Graduate Vacuum Solutions to Einstein's Equations
- Airsteve0
- · Replies 2 ·
Graduate Revised Field Equations for GR Explain Dark Energy and Dark Matter
- AllenMcC.
- · Replies 31 ·
Graduate Can a Photon Create a Black Hole in Different Frames of Reference?
- mrspeedybob
- · Replies 6 ·
Graduate Visualization of metric tensor
- exponent137
- · Replies 3 ·
Graduate Time dilation between observer on Earth and observer far from gravitational field
- aditya23456
- · Replies 3 ·
Undergrad Speed of light is a constant. How?
- back2square1
- · Replies 13 ·
Graduate Explosion of a moving mass into two parts.
- randombill
- · Replies 7 ·
Graduate Relativity 101: Near speed of light travel
- Chuck37
- · Replies 3 ·
Graduate Conservation of stress-energy with quintessence
- bcrowell
- · Replies 9 ·
Graduate Do gravitational waves penetrate black holes?
- nikkkom
- · Replies 5 ·
Graduate One-way tests of special relativity
- hkyriazi
- · Replies 32 ·
Graduate Distance between fast moving objects
- Chuck37
- · Replies 26 ·
Graduate How do entropy and the observer in relativity relate?
- Galteeth
- · Replies 3 ·
Graduate A Universe with no Twin Paradox
- Thecla
- · Replies 9 ·
Graduate Hawking Radiation inside a Black Hole?
- nickyrtr
- · Replies 12 ·
Undergrad Calculating a Character's Warp Speed in a Book
- supta78
- · Replies 5 ·
Graduate Shape Operator for Schwarzschild spacetime in 2-dim
- honeytrap
- · Replies 5 ·
Graduate Speed of light shot from behind
- Happy Recluse
- · Replies 8 ·
Graduate About quantum entanglement and relativity of simultaneity
- Ookke
- · Replies 17 ·
Undergrad Is the speed of light constant in a medium?
- lmoh
- · Replies 2 ·
Graduate A few questions about gravity, space, and reality in general
- Selfier
- · Replies 21 ·
Graduate Are radio waves redshifted or do clocks measure frequency differently?
- Chuck37
- · Replies 16 ·
Graduate Unified Theory of Dark Matter, Dark Energy from altered EFE
- Lord_Sidious
- · Replies 2 ·
Graduate Is it possible for a photon lifetime to be complex ?
- susovan0010
- · Replies 4 ·
Graduate On modified theories of gravity
- xiaomaclever
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Graduate Relativistic Doppler and preferred frame
- Austin0
- · Replies 7 ·
Graduate Photon sphere vs horizon as a null suface
- Jip
- · Replies 4 ·
Graduate Effect of cosmological expansion on bound systems in realistic cosmologies
- bcrowell
- · Replies 18 ·
Graduate Is gravity a force or curvature of spacetime?
- daisey
- · Replies 18 ·
Graduate Particle on a curved trajectory
- Sunfire
- · Replies 14 ·
Graduate Why does low frequency light appear to travel faster than high frequency light?
- peterspencers
- · Replies 20 ·
Graduate Tangent space basis construction in Wald theorem 2.2.1
- CJ2116
- · Replies 3 ·
Graduate How Does Gravity from Nearby Stars Affect Black Hole Movement?
- sweet springs
- · Replies 8 ·
Graduate Why does Bailey experiment not show gravitational time dilation?
- arindamsinha
- · Replies 7 ·
Graduate How Do Black Holes Emit Photons?
- AbsoluteZer0
- · Replies 2 ·
Graduate Does Relativity Allow for Faster-than-Light Travel?
- PerpStudent
- · Replies 12 ·
Graduate What is the Doppler effect in different frames of observation?
- Chuck37
- · Replies 20 ·
Graduate Lorentz invariance of four-volume element [itex] d^4x [/itex]
- LayMuon
- · Replies 20 ·
Graduate Requesting Clear Description of Contravariant vs Covariant vectors
- tylerscott
- · Replies 7 ·
Graduate What is zero time between events?
- boffinwannabe
- · Replies 13 ·
Graduate Points of reference for time dilation
- Joshcad55
- · Replies 24 ·
Graduate Calculating Velocity of Moving Objects Relative to Each Other
- Government$
- · Replies 6 ·
Graduate Speed of the light and dilation of time
- uniqueland
- · Replies 289 ·
Undergrad The Motion of Photons: Where Does the Energy Go?
- Belial(1)
- · Replies 2 ·
Graduate Problem with Schwarzschild metric derivation
- grav-universe
- · Replies 14 ·
Graduate The God Effect and the Black Hole
- conner.ubert
- · Replies 7 ·
Graduate Is superluminal communication impossible according to STR?
- Jano L.
- · Replies 10 ·
Undergrad How does gravity in space work?
- rondfromdale
- · Replies 4 ·
Undergrad Whenever we increase the velocity of a particle, the mass of he particle also
- aayushmittal
- · Replies 3 ·
Graduate Does the event horizon reveal a black hole's mass, angular momentum, and charge?
- sweet springs
- · Replies 5 ·
Graduate Observers/observations according to SR
- Vandam
- · Replies 30 ·
Graduate Why does the spacetime interval Δt² - Δx² change under Lorentz transformation?
- BWV
- · Replies 1 ·
Graduate Time dilation in the period of a pendulum
- khurram usman
- · Replies 10 ·
High School Concepts of time on Earth, Space and on other Planets
- Astrid
- · Replies 4 ·
Graduate Gravitational lensing derivation using equivalence principle
- grav-universe
- · Replies 33 ·
Graduate Relative velocity between two accelerating observers
- dEdt
- · Replies 7 ·
Graduate Bohr radius and length contraction
- apratim.ankur
- · Replies 14 ·
Graduate Aid to visualizing warped Spacetime?
- EskWIRED
- · Replies 3 ·
Graduate Does every field have a magnetic equivalent due to relativistic effects?
- StephenofCaly
- · Replies 29 ·
Graduate Bianchi Identity-where did I go wrong?
- zn5252
- · Replies 4 ·
Graduate Why doesn't hawking radiation prevent a space-like singularity
- lukesfn
- · Replies 42 ·
Graduate Time reversal in General Relativity, and black holes
- georgir
- · Replies 6 ·
Graduate Deriving rotation matrix identity from MTW exercise 9.13
- shichao116
- · Replies 1 ·
Graduate Contradiction in MTW's Gravitation exercise 16.1 on connection coefficients
- qinglong.1397
- · Replies 8 ·
Graduate Slow-rotation weak-field limit of Kerr
- Saeide
- · Replies 6 ·
Undergrad A typo or I don't understand it?
- RobinSky
- · Replies 17 ·
Graduate Can Lorentz transformations be interpreted in Lorentz ether theory?
- Vandam
- · Replies 3 ·
Graduate Aging in faster-than-light travel with gravitational time dilation
- Astrid
- · Replies 6 ·
Graduate Relativistic mass, time dilation, length contraction, and traveling near c
- coktail
- · Replies 16 ·
Graduate Can SR be derived from causality alone?
- friend
- · Replies 35 ·
Graduate Do objects persist through time or cease and restart with each change?
- billa12
- · Replies 32 ·
Graduate Why is the basis vector e_μ = ∂/∂x^μ and not ∂r/∂x^μ?
- HJ Farnsworth
- · Replies 17 ·