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 Solving Paradox of SR & Warning Alpha Centaurians: Passer-by's Perspective
- Pavel
- · Replies 40 ·
Graduate Rotating Black Holes | Angular Momentum Explained
- DBrant
- · Replies 2 ·
Graduate Which direction did they measure a meter?
- FatCat0
- · Replies 6 ·
Undergrad Lorentz Factor Explained for Laymen: Twin Paradox
- Santural
- · Replies 4 ·
Graduate General Relativity vs Newtonian Mechanics
- ueit
- · Replies 5 ·
Graduate Is Acceleration Truly Relative or Absolute in the Context of General Relativity?
- fireball3004
- · Replies 14 ·
Graduate How Does Time Function as a Fourth Dimension in Our Solar System?
- Santural
- · Replies 7 ·
Graduate Gravitomagnetism and acceleration
- Xezlec
- · Replies 19 ·
Graduate What Is the Physical Meaning of the Torsion Tensor in General Relativity?
- tetraedro
- · Replies 9 ·
Graduate Has the Hawking-Penrose Debate Shaped Modern Physics?
- RJ Emery
- · Replies 1 ·
Graduate Understanding Einstein-Hilbert Action: Detailed Explanation from an Expert
- Terilien
- · Replies 4 ·
Graduate Time & Gravity: GR in Physics Today?
- Dravish
- · Replies 60 ·
Graduate Full Orbit in General Relativity: Defining a Frame Invariant Concept
- MeJennifer
- · Replies 19 ·
Graduate Practical meaning of simultaneity calculations?
- Ookke
- · Replies 10 ·
Graduate Question About Speed of Light and Energy
- Arepo
- · Replies 13 ·
Undergrad How are the photoelectric effect and special relativity related?
- paradoxical67
- · Replies 6 ·
Graduate Understanding Velocity Transformation: A Crucial Factor in Particle Motion
- bernhard.rothenstein
- · Replies 8 ·
High School Does Earth's Gravitational Pull Increase with Object Proximity?
- hq2u
- · Replies 4 ·
Graduate How Does a Black Hole Affect the Human Body?
- pgcurt
- · Replies 2 ·
Graduate Why did Einstein define speed of light as a constant and time as a variable?
- EnumaElish
- · Replies 19 ·
Graduate Can All Clocks in an Inertial Frame Simultaneously Read Zero?
- bernhard.rothenstein
- · Replies 7 ·
Graduate A question about general relativity ?
- ngkamsengpeter
- · Replies 6 ·
Graduate Can Special Relativity Solve the Twin Paradox in a Gravitational Field?
- lightarrow
- · Replies 7 ·
Graduate GPS, GR, satellites and clock speed on the satellites
- OS Richert
- · Replies 21 ·
Graduate Temperature and speed of clocks
- Rothiemurchus
- · Replies 2 ·
Graduate Observing an astronaut falling into a black hole
- overlook1977
- · Replies 8 ·
Graduate What is the definition of general covariance ?
- pervect
- · Replies 5 ·
Graduate Photon wavelength in expanding universe
- JustinLevy
- · Replies 4 ·
Graduate How Can I Understand Slowly Rotating Perturbations of the Whittaker Metric?
- MstoneHall
- · Replies 3 ·
Graduate How Does General Relativity Explain Why We Always See the Same Side of the Moon?
- jimbobjames
- · Replies 1 ·
Undergrad Light Behaviour: Does Gravity Accelerate Light?
- Nuclear on the Rocks
- · Replies 11 ·
Graduate Tensor pertubration: Hello to everyone
- darashayda
- · Replies 20 ·
Graduate Can Adding a Constant to the D'Alembertian Maintain Relativistic Invariance?
- gulsen
- · Replies 2 ·
Graduate Schwarzschild black hole/kruskal extension
- dookie
- · Replies 12 ·
Graduate Relativistic Limit of Tardyon Momentum and Mass
- bernhard.rothenstein
- · Replies 21 ·
Graduate Spacetime, the Universe, the Present and the Future
- Seeker2K
- · Replies 6 ·
Graduate Challenging the Speed of Light: The Curious Case of Opposing Photons
- Tojen
- · Replies 32 ·
Graduate Understanding Time Dilation in Einstein's Special Theory of Relativity
- windscar
- · Replies 13 ·
Graduate A question about time dialation
- Johnny R
- · Replies 12 ·
Graduate Antisymmetrized tensor product
- Terilien
- · Replies 8 ·
Graduate Gravity Probe-B: Results & General Relativity
- magnetar
- · Replies 36 ·
Graduate Expressing second and its derivatives in terms of seven SI base units
- TurricaN
- · Replies 29 ·
Graduate Light's Instantaneous Wordline: Is Time Really Zero?
- OS Richert
- · Replies 4 ·
Graduate Twin paradox again (yes again)
- OS Richert
- · Replies 21 ·
Graduate What Are the Implications of Time Dilation on a Photon’s Speed and Perception?
- fireball3004
- · Replies 4 ·
High School What is the first result on Gravity Probe B?
- cosmopot
- · Replies 2 ·
Graduate Explain Independent Continuum: Einstein's Theory
- paradoxical67
- · Replies 8 ·
Graduate What is the mass of a photon and why does it have a mass?
- brianthewhitie7
- · Replies 17 ·
Graduate Question on Relativistic Doppler Shift
- arunma
- · Replies 6 ·
Graduate Why is Planck time measured differently from other dimensions?
- spizma
- · Replies 19 ·
Graduate Velocity Addition in MG and Light Scenarios
- bernhard.rothenstein
- · Replies 22 ·
Graduate The Nature of Time: Should It Be Considered a 4th Dimension?
- saderlius
- · Replies 95 ·
Graduate Is There an Absolute Rest Frame in a 2D Universe?
- Alkatran
- · Replies 58 ·
Looking for a relativity movie
- lalbatros
- · Replies 8 ·
Graduate Metric of supermassive black holes
- Rothiemurchus
- · Replies 2 ·
Graduate How Do CMB and Redshift Support Universe Expansion?
- bchui
- · Replies 1 ·
Graduate A scientist’s transmitter emits a wavelength
- ramcg1
- · Replies 34 ·
A question about a thought experiment in space
- marlos jacob
- · Replies 55 ·
Undergrad Understanding the Impact of Mood on Perception
- Loren Booda
- · Replies 2 ·
Undergrad What is Einstein's thought experiment about special relativity?
- go9ers14
- · Replies 12 ·
Graduate Abraham Zelmanov's Chronometric Invariants
- MeJennifer
- · Replies 1 ·
Graduate Could Time Dilation Make Us Age Differently on Other Planets?
- bassplayer142
- · Replies 28 ·
Graduate Are There PDEs in Special Relativity?
- pivoxa15
- · Replies 1 ·
Graduate Some Inertial Frames may br more Equivalnet than Others
- yogi
- · Replies 6 ·
Graduate Understanding Relativity: Increasing Speed
- neolayman
- · Replies 9 ·
Graduate Two Body Problem: Exact Solutions?
- MeJennifer
- · Replies 3 ·
Undergrad I Need the explaination of The image of formation of black hole
- Huma waseem
- · Replies 7 ·
High School If I swing my arm, it can emit gravitational waves?
- magnetar
- · Replies 1 ·
Undergrad Transforming Kinetic Energy: A Geometric Approach
- bernhard.rothenstein
- · Replies 6 ·
Undergrad Twin Paradox Theory: Explained for 9th Graders
- regaldeath
- · Replies 3 ·
Graduate Black hole entropy as a Noether Charge
- haushofer
- · Replies 1 ·
Graduate Proving invariance of scalar product
- Gabor
- · Replies 4 ·
Graduate Implications of geodesiacs(philosophical)
- saderlius
- · Replies 25 ·
Graduate D'Alembertian question again (sorry)
- neu
- · Replies 4 ·
Graduate Questions about the speed of light.
- Charlie X
- · Replies 7 ·
Graduate Question about Mass(special relativity)
- Littlepig
- · Replies 28 ·
Graduate Understanding the Detonator Paradox: A Relativity-Based Explanation
- fizzzzzzzzzzzy
- · Replies 2 ·
Graduate Confused by D'alembertian operator in EM
- neu
- · Replies 2 ·
Graduate What is the material that allows transverse but not longitudinal waves?
- Locrian
- · Replies 8 ·
Undergrad Twin #1 is calling twin #2 in mid flight on instant-stellar phone
- schwarg2
- · Replies 10 ·
Graduate Metric versus Tetrad formulation of relativity
- MeJennifer
- · Replies 3 ·
Graduate What is the Twin Paradox in General Relativity?
- MotolovCocktail
- · Replies 12 ·
Undergrad Grasping Special Relativity: Concept Understanding for 17yo
- paradoxical67
- · Replies 17 ·
Undergrad Starting to learn about General and special relativity
- David_Harkin
- · Replies 2 ·
Graduate Double Special Relativity (DSR) fake or real?
- tpm
- · Replies 5 ·
Graduate Probably dumb question. problem understanding formula
- moe darklight
- · Replies 11 ·
Undergrad Is there a way to intuitively understand proper time in special relativity?
- minijumbuk
- · Replies 8 ·
Graduate The physical nature of spacetime
- jimbobjames
- · Replies 36 ·
Graduate Doppler shift formula and the assumptions behind it
- bernhard.rothenstein
- · Replies 8 ·
Graduate Is the first postulate necessary?
- CPL.Luke
- · Replies 10 ·
Graduate The Relativistic Mass-Energy Relationship
- Leonardo Sidis
- · Replies 24 ·
Graduate E=mc2 Energy converts to matter
- .ultimate
- · Replies 4 ·
Undergrad Time dilation- V relative to what?
- DyslexicHobo
- · Replies 12 ·
Graduate A question about constant acceleration close to the speed of light
- ledopmi
- · Replies 12 ·
Graduate Einstein's Field Equation Stress-Energy
- Ich
- · Replies 16 ·
Graduate Geodesic Deviation: Deriving Formula with Schtuz's Book
- Terilien
- · Replies 2 ·
Graduate Is Simultaneity Absolute in Einstein's Theory of Relativity?
- fireball3004
- · Replies 56 ·
Graduate Inertial Frame R: Persisting Relationships of Particles' Positions & Velocities
- imy786
- · Replies 1 ·
Graduate Is this the fabric of the universe?
- paul_peciak
- · Replies 1 ·
Graduate If a charged particle is free falling in the gravitational field-
- magnetar
- · Replies 51 ·