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 Is E = mc^2 the only formula for total energy?
- pmb_phy
- · Replies 11 ·
Undergrad Why is gamma necessary in the Lorentz transformation?
- actionintegral
- · Replies 13 ·
Graduate Newton's Gravity corrected and Pioneer 10 anomaly
- tehno
- · Replies 5 ·
Graduate Why can't photons see other photons as stationary if they're moving together?
- Bos
- · Replies 15 ·
Graduate Does infinite time to cross the horizon prevent black hole formation?
- wywong
- · Replies 23 ·
Graduate Heated discussion about a flaw
- lalbatros
- · Replies 11 ·
Graduate Temporal distortion of a moving train
- davidong3000
- · Replies 27 ·
Graduate How did Maxwell's theory implicitly define clock synchronization before relativity?
- lalbatros
- · Replies 10 ·
Graduate Topology of Spacetime: Non-Compactness Not Required?
- shoehorn
- · Replies 2 ·
Graduate Solving the Submarine Problem: Will it Rise or Sink?
- raul_l
- · Replies 2 ·
Graduate Precession of the perihelion - Schwarzschild metric
- tel
- · Replies 3 ·
High School Does a Fourth Dimension Beyond Time Exist?
- minase
- · Replies 9 ·
Graduate Are there other phenomena (besides light) whose speed is invariant?
- quantumphilosopher
- · Replies 1 ·
Graduate Does relativistic beaming make a moving light source's beam angle appear larger?
- pivoxa15
- · Replies 21 ·
Graduate Why did Einstein use light to define simultaneity?
- quantumphilosopher
- · Replies 5 ·
Graduate Does Gravity Affect the Local Speed of Light in Accelerated Frames?
- yogi
- · Replies 4 ·
Graduate Lightbulb Paradox: Solving John Wheeler's Problem in SpaceTime Physics
- daniel_i_l
- · Replies 2 ·
Graduate Why does pair production require another body for momentum conservation?
- pivoxa15
- · Replies 12 ·
Graduate How Can Successive Boosts Illuminate the Lorentz Transformation?
- actionintegral
- · Replies 5 ·
Graduate Is Conservation of Scalar Quantities Possible in General Relativity?
- pivoxa15
- · Replies 14 ·
Graduate Is Time Merely a Consequence of Space and Speed Limit c?
- gruff
- · Replies 9 ·
Graduate Trying to understand relativity of lengths and times
- myoho.renge.kyo
- · Replies 31 ·
Graduate Figuring out the units for the cosmological constant
- Mike2
- · Replies 7 ·
Graduate Why Do Space-Time Diagrams Reverse Axes in Special Relativity?
- bernhard.rothenstein
- · Replies 3 ·
Graduate What do timelike and spacelike vectors mean?
- jainabhs
- · Replies 6 ·
Graduate Does Mass Really Increase Infinitely as Objects Approach the Speed of Light?
- TDS
- · Replies 19 ·
Graduate Why does E=mc² involve c if nothing can exceed the speed of light?
- GautamAishwarya
- · Replies 1 ·
Graduate How Speed of Light Is the Same Speed in All Frames
- kant
- · Replies 12 ·
Graduate Was the Schwarzschild geometry acceptable
- lalbatros
- · Replies 6 ·
Graduate Question on Einstein's Equation
- timmy
- · Replies 1 ·
Graduate What does the factor from length contraction and time dilation represent in m/s?
- petm1
- · Replies 4 ·
Graduate Resolving the Incompatibility of Special Relativity and Quantum Mechanics
- JustinLevy
- · Replies 2 ·
Graduate Proper time for an object falling into a black hole
- MeJennifer
- · Replies 5 ·
Graduate Does Lorentz symmetry describe physical reality or just coordinate systems?
- JesseM
- · Replies 55 ·
Graduate Negative Mass and its Implications
- Swapnil
- · Replies 3 ·
Undergrad The speed of light in a vacuum?
- Sauwelios
- · Replies 19 ·
Graduate How Do Time Sources and Space Sinks Relate to General Relativity?
- Jonny_trigonometry
- · Replies 4 ·
Graduate Important note concerning relativity of time
- myoho.renge.kyo
- · Replies 4 ·
Is Spacetime Shaped Like the Sea?
- ريمان
- · Replies 7 ·
Graduate What Is the Relationship Between Photon Mass and Frequency?
- lightarrow
- · Replies 2 ·
Graduate What is time dilation and how does it relate to Einstein's theory?
- petm1
- · Replies 108 ·
Graduate How Does Relativity Affect Movement on a Ship Near Light Speed?
- Castlegate
- · Replies 12 ·
Graduate Does Newtonian gravity bend light?
- smithpa9
- · Replies 31 ·
Undergrad Inertial Reference Frames- circular?
- AcidRainLiTE
- · Replies 34 ·
Graduate Freezing light contradicts Einstein?
- Robert E Dean
- · Replies 10 ·
Could You Pick Up an Airplane in Frozen Time?
- Quadruple Bypass
- · Replies 22 ·
Graduate Information loss in black holes and Hawking's parallel universe resolution
- RAD4921
- · Replies 4 ·
Graduate Is General Relativity Actually an Aether Theory?
- Jonny_trigonometry
- · Replies 11 ·
Graduate SR transforms of matter/light interactions
- Leo.Ki
- · Replies 10 ·
Graduate A moving clock lags behind a stationary clock
- myoho.renge.kyo
- · Replies 2 ·
Undergrad Why Mass Doesn't Always Add When Two Systems Combine
- pivoxa15
- · Replies 20 ·
Graduate Twins Paradox: Does Twin A Die?
- jmenke
- · Replies 9 ·
Graduate How does relativity explain rotational motion and Newton's bucket argument?
- pilopais
- · Replies 61 ·
Graduate Inertial mass, invariant mass and the photon?
- pivoxa15
- · Replies 12 ·
Graduate Black Holes and the Event Horizon?
- TDS
- · Replies 16 ·
Graduate How Fundamental Is General Relativity in Understanding Black Holes?
- lalbatros
- · Replies 1 ·
Graduate Physical meaning of action and its role in connecting GR to quantum mechanics
- lightarrow
- · Replies 6 ·
Graduate Einstein's original paper question
- 18t
- · Replies 1 ·
Undergrad Evidence for length contraction
- redruM
- · Replies 14 ·
Graduate Is Light-Like an Appropriate Term in Minkowski Space Terminology?
- actionintegral
- · Replies 7 ·
Graduate Correct derivation of magnetism from SR
- Hans de Vries
- · Replies 6 ·
Graduate Photons Perceive Universe as 2D: A Curious State?
- LHarriger
- · Replies 2 ·
Graduate Gyroscopic action on earth surface
- RandallB
- · Replies 6 ·
Undergrad Why Doesn't Relativity Apply to Light?
- Line
- · Replies 68 ·
Undergrad Einstein's theory of relativity?
- Indian_2006
- · Replies 10 ·
Graduate How should relative velocity be defined in curved spacetime?
- Oxymoron
- · Replies 30 ·
Graduate Can dark energy result from spacetime's natural curvature?
- heliocentricprose
- · Replies 4 ·
Graduate Are the transforms instantaneous?
- Leo.Ki
- · Replies 2 ·
Graduate What Sense Does High Velocity Travel Make? - Oh-My-God Particle
- KingOrdo
- · Replies 7 ·
Graduate Correct formula for gravitational redshift
- notknowing
- · Replies 12 ·
Graduate Nail and cylinder problem in SR
- lalbatros
- · Replies 8 ·
Undergrad Special Relativty and Inertial Reference Frames
- SudanBlack
- · Replies 3 ·
Undergrad How Relativity Connects Electric and Magnetic Fields
- nathan.br
- · Replies 2 ·
Graduate Stress-energy tensor as a 2-form
- pervect
- · Replies 9 ·
Graduate Does SR Affect Biological Processes? A Twin Experiment
- AlbertEinstein
- · Replies 10 ·
Graduate Why does total energy equal rest energy plus kinetic energy?
- QuantumKing
- · Replies 44 ·
Graduate What causes space curves? Energy or rest mass?
- quasar987
- · Replies 29 ·
Graduate Why is special relativity preferred over Lorentz ether theory?
- Aether
- · Replies 179 ·
Graduate Photons and potential energy wells.
- Atomos
- · Replies 8 ·
Graduate Lorentz Transformation - Exponential factor, why not Proportional?
- Gamish
- · Replies 43 ·
Graduate Why is t' not equal to t/sqrt(1-v^2/c^2) in relativity of time?
- myoho.renge.kyo
- · Replies 5 ·
Graduate A question regarding a specific interval of time and GR
- myoho.renge.kyo
- · Replies 4 ·
Graduate How Do You Derive 4-Acceleration from 4-Velocity?
- JabberWalkie
- · Replies 1 ·
Graduate Infinite Curvature: Understanding Black Holes
- pibomb
- · Replies 3 ·
Graduate Can an object travel faster than light?
- actionintegral
- · Replies 19 ·
Graduate Why is 4-momentum usually given as a covector?
- masudr
- · Replies 15 ·
Graduate Poisson brackets in general relativity
- shoehorn
- · Replies 1 ·
Undergrad Energy-mass equivalence - E=mc^2
- heliocentricprose
- · Replies 15 ·
Graduate Question regarding acceleration in spacetime
- Bos
- · Replies 9 ·
Graduate Can Events in Relativity Be Observed Simultaneously from Different Frames?
- P3X-018
- · Replies 12 ·
Graduate Worldlines - no need for ref frames?
- pivoxa15
- · Replies 4 ·
Graduate How does light bend in intense gravitational fields if it has no mass?
- QuantumKing
- · Replies 16 ·
Graduate Length contraction vs. relativistic perspective effects in Calder
- denni89627
- · Replies 18 ·
Graduate The principle of the constancy of the velocity of light
- myoho.renge.kyo
- · Replies 18 ·
Graduate Can you go to the past if you travel faster than light?
- Skhandelwal
- · Replies 67 ·
Graduate Light-speed is infinite, in a certain way?
- Ookke
- · Replies 16 ·
Graduate Why are there two delta x^u/v in equation (1.16) on page 9 of Carroll's GR book?
- OS Richert
- · Replies 13 ·
Graduate Velocity v & c^2: Simultaneous Events
- actionintegral
- · Replies 11 ·
Graduate Mutual effects of gravity and velocity on time
- Dmstifik8ion
- · Replies 3 ·
Graduate Why can we not see the future?
- aberrated
- · Replies 27 ·