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 How to derive t1 in terms of t and t in terms of t1
- manvirsingh
- · Replies 4 ·
Graduate Confused with directional derivative definition of vectors
- GarageDweller
- · Replies 16 ·
Graduate Rotation speed near light speed increasing gravity?
- SpiderET
- · Replies 1 ·
Undergrad Is this a truth and its evidence?
- HuaMin
- · Replies 1 ·
Graduate Asymmetric stress tensor gives asymmetric stress-energy tensor?
- bcrowell
- · Replies 11 ·
Graduate Who came up with the Light Clock Thought Experiment
- Lamarr
- · Replies 7 ·
Graduate Time dilation when falling into a black hole
- guss
- · Replies 34 ·
Graduate Does time dialation cause mass reduction in GR?
- goldk
- · Replies 29 ·
Graduate My Particularly Troublesome Version of the EPR Paradox
- Simultaneity
- · Replies 3 ·
Graduate Fluid Tensors and the Cosmological Constant
- Messenger
- · Replies 52 ·
Graduate Four-Dimensional Vector in Special Relativity
- zhangyang
- · Replies 2 ·
Graduate Variation of Laplace-Beltrami wrt metric tensor
- Päällikkö
- · Replies 0 ·
Graduate Generalizing the special principle of relativity?
- dEdt
- · Replies 14 ·
Graduate Why Do We Use Light Signals to Measure Time?
- crimsonidol
- · Replies 2 ·
Graduate Can Torsion Exist in Two Dimensions from a Differential Geometry Perspective?
- bcrowell
- · Replies 19 ·
Undergrad Time & Space: Is One Relative to the Other?
- AH020387
- · Replies 2 ·
Graduate 'Symmetrisation Notation' - What is it?
- InsertName
- · Replies 2 ·
Graduate How massive does a planet have to be to cut time in half?
- goldk
- · Replies 8 ·
Graduate Photon Clock & Time Dilation: Rotating the Clock 90 Degrees
- peterspencers
- · Replies 18 ·
Graduate Foundations of General Relativity Text - Recommendations
- dEdt
- · Replies 1 ·
Graduate Could Gravity Transport Energy?
- TheEtherWind
- · Replies 3 ·
Graduate Twin paradox on another planet
- i-am
- · Replies 4 ·
Graduate Why don't objects in orbit fall into the center?
- bigyinlee
- · Replies 5 ·
Graduate Time dialation in different parts of a fast moving rocket
- fawk3s
- · Replies 9 ·
Undergrad Is time still affected (slowed down) at the center of the earth?
- goldk
- · Replies 3 ·
Graduate Time dilation by homogeneous distribution of massive objects?
- jaketodd
- · Replies 1 ·
Graduate GR: Gravitational Forces Represented by Christoffel Symbols
- pervect
- · Replies 34 ·
Graduate Observer Frame of Reference
- surd100
- · Replies 3 ·
Undergrad Can someone please explain to me how space-time works? Is space-time a
- patep022
- · Replies 3 ·
Graduate Understanding Proper Length in Special Relativity
- Beelzebro
- · Replies 5 ·
Graduate Upper limit on the characteristics of Singularity
- surajt88
- · Replies 6 ·
High School Question About Time and the Speed of Light
- claytonh4
- · Replies 4 ·
Graduate Gravitational Waves: Speed & How Objects Affect it
- cragar
- · Replies 3 ·
Graduate Trying to understand relativity
- kr75
- · Replies 10 ·
Graduate Can You Travel Faster Than The Speed Of Light?
- WARLORDTF
- · Replies 34 ·
Graduate Minkowski Inner Product and General Tensor/Matrix Question
- Vorde
- · Replies 2 ·
Graduate Time Dialation and Biological systems
- indirachap
- · Replies 77 ·
Graduate Curvature of Time: Measuring Change in XYZ Axis
- JPBenowitz
- · Replies 15 ·
Undergrad Is Gravity a force, or not a force?
- KirkDamborg
- · Replies 41 ·
Graduate A Relativity-Related Thought Experiment that has Given me Trouble
- Math Buddy
- · Replies 2 ·
Undergrad Predictions we can derive if light were corpuscular
- spaghetti3451
- · Replies 4 ·
Graduate Is Light's Medium the Luminiferous Aether or the Electromagnetic Field?
- spaghetti3451
- · Replies 4 ·
Graduate Does relativity restrict velocity relative to an observer?
- jfraze
- · Replies 2 ·
Graduate How did Lorentz come up with his ether theory?
- Lamarr
- · Replies 15 ·
Undergrad Is Backwards Time Travel Possible or Just a Paradox?
- PhysicsBlock
- · Replies 15 ·
Graduate Einstein: Balancing 3D Positions & Time in E=mc2
- Stu21
- · Replies 13 ·
Graduate Is the Constancy of Light in Vacuum a Proof or a Postulate?
- Boorglar
- · Replies 45 ·
Can We Really Stop Time and Change Our Past?
- shinnsohai
- · Replies 18 ·
Graduate Physical Effects of ball moving at 0.9c
- cepheid
- · Replies 26 ·
Graduate Why are mass, length, and energy relative?
- beatlemaniacj
- · Replies 2 ·
Undergrad Relativity of simultaneity and doppler effect
- cdot
- · Replies 3 ·
Graduate How Does Hartle Derive the Equation from Arc Length to a Trigonometric Integral?
- Nano-Passion
- · Replies 10 ·
Graduate Lorentz covariance and Noether's theorem
- ShayanJ
- · Replies 3 ·
Graduate If you could travel faster than light
- shadow15
- · Replies 4 ·
Graduate Interpretation of Einstein's E=mc2 paper
- bcrowell
- · Replies 4 ·
Graduate I'm sorry, I don't understand what you are asking for. Could you please clarify?
- GRstudent
- · Replies 130 ·
Graduate Do Free-Falling Charges in a Static Gravitational Field Radiate?
- tom.stoer
- · Replies 53 ·
Graduate Confused about the metric tensor
- GarageDweller
- · Replies 1 ·
Graduate Why do blackholes cut off from the rest of the universe
- g.lemaitre
- · Replies 14 ·
Graduate Understanding the Lorentz Group: What does O(1,3) mean?
- dimension10
- · Replies 5 ·
Graduate Does light experience time and space simultaneously?
- billa12
- · Replies 11 ·
Graduate Understanding Relativity: The Constant Speed of Light Phenomenon
- codeman_nz
- · Replies 7 ·
Graduate Measured lightspeed in general relativity and moving through space.
- Bulb
- · Replies 3 ·
Graduate Questions concerning Cosmological Constant
- Rorkster2
- · Replies 3 ·
Graduate Understanding Lorentz Transformation of Spin 4-Vector
- Heirot
- · Replies 17 ·
Graduate Simplify Confusing Expression in GR: Expert Guidance Available
- unchained1978
- · Replies 3 ·
Undergrad Light speed; time dialation theory and its age
- rgprasannakum
- · Replies 5 ·
Graduate Diff Geom in Complex Spaces: Hermitian, Anti-Symmetric & Affine Connections
- thehangedman
- · Replies 1 ·
Graduate Effect of CMB (cosmic microwave background) on objects at relativistic speeds
- rorix_bw
- · Replies 4 ·
Graduate Four force giving me headaches
- GarageDweller
- · Replies 2 ·
Graduate Geodesic Equations: Newtonian vs Einstein
- GRstudent
- · Replies 3 ·
High School Where can I find easy-to-understand books about relativity?
- codeman_nz
- · Replies 10 ·
Graduate How is the universe exactly 13.7 billion years old, in absence of absolute time?
- mitrasoumya
- · Replies 6 ·
Graduate Taub-Nut or NUT metric, that is the question
- Saeide
- · Replies 3 ·
Graduate Understanding Relativity and Time Dilation in Space Travel
- Veni2K
- · Replies 16 ·
Graduate Solve Schwarzschild Metric: Transformation & Acceleration
- eoghan
- · Replies 15 ·
Graduate What is the force behind matter's ability to curve space-time?
- SampsonB
- · Replies 4 ·
Graduate Superluminal Neutrino Breaks SR and GR ?
- Allojubrious
- · Replies 3 ·
Graduate A Question on Relativistic Mass (SR)
- ASmc2
- · Replies 2 ·
Graduate Does the bending of light by gravity imply that photons have mass?
- Allojubrious
- · Replies 3 ·
Graduate Gauss-Bonnet term extrinsic curvature
- sourena
- · Replies 4 ·
Graduate Relativistic Coulomb potential - how to understand the equation
- James MC
- · Replies 9 ·
Graduate Solving Einstein Notation: Summing Subscripts and Superscripts
- andrewkirk
- · Replies 2 ·
Graduate I don't understand the nature of gravity
- studentxlol
- · Replies 10 ·
Graduate Isotropic Observer: Are They Always At Rest?
- eoghan
- · Replies 16 ·
Graduate Quick question of Einstein Field Equations
- Allojubrious
- · Replies 7 ·
Graduate Linearity of Maxwell's equations as a result of special relativity.
- Snicker
- · Replies 31 ·
Graduate General relativity for a master degree?
- alialice
- · Replies 2 ·
Graduate Converting mass entirely into energy
- g.lemaitre
- · Replies 4 ·
Graduate Measuring Observables in 3+1 Formalism
- tendor
- · Replies 6 ·
Graduate Kinetic energy conservation in matter/energy transform
- Ookke
- · Replies 15 ·
Graduate General Relativity vs. quantum gravity
- soothsayer
- · Replies 13 ·
Graduate Understanding the Lorentz Factor
- Vorde
- · Replies 15 ·
Graduate Vectors/Tensors-spherical coordinates. z component of force of fluid on a sphere
- racnna
- · Replies 8 ·
Graduate Four Velocity in GR: Covariant Derivative Needed?
- GarageDweller
- · Replies 16 ·
Graduate Can the magnetic field from a single charge be converted into an electric field?
- Trifis
- · Replies 29 ·
Graduate Why Does Heart Slow as Near Light Speed?
- multige
- · Replies 8 ·
Graduate Relativistic time dilation and thermodynamics
- qbit
- · Replies 16 ·
Graduate Thought experiment on Simultaneity
- kannank
- · Replies 29 ·
Graduate How to get components of Riemann by measuring geodesic deviation?
- shichao116
- · Replies 9 ·