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 Einstein did not derive E =mc2 first
- ajay22444
- · Replies 38 ·
Graduate Is the Terrell-Penrose Effect accurately depicted in these animations?
- clj4
- · Replies 6 ·
Graduate Why Twins Feel Different Speeds on Opposite Carousels
- whoelsebutme
- · Replies 5 ·
Graduate Gravitational time dilation due to one's own mass
- DiamondGeezer
- · Replies 8 ·
Graduate Is There a Limit to Temperature in Relativistic Thermodynamics?
- gijeqkeij
- · Replies 7 ·
Graduate Does the Twins Paradox Always Hold True for Inertial and Non-Inertial Observers?
- Al68
- · Replies 11 ·
Graduate How Does Relativistic Deceleration Affect Velocity Calculations in Space Travel?
- Al68
- · Replies 70 ·
Undergrad Calculate Time Difference: Relativity Equation for Sun and Earth Masses
- kajak
- · Replies 4 ·
Graduate How do you prove the relationship between electromagnetic and metric tensors?
- Emanuel84
- · Replies 3 ·
Graduate What Color Would a Light Beam Appear While Chasing It at 0.999c?
- Quantum1332
- · Replies 6 ·
Graduate Black holes and scientific fraud
- Crothers
- · Replies 10 ·
Graduate How Does a Light Clock Demonstrate Motion in Relativity?
- delerious121
- · Replies 3 ·
Graduate Clocks and Time Dilation in Relativity
- MonstersFromTheId
- · Replies 3 ·
Graduate Isotropic and anisotropic propagation of light
- bernhard.rothenstein
- · Replies 132 ·
Undergrad Can mass expand faster than light speed during the big bang?
- disregardthat
- · Replies 26 ·
Graduate Gravity in the expanding universe.
- Tzemach
- · Replies 16 ·
Graduate World's Fastest DerivationS of the Lorentz Transformation?
- robphy
- · Replies 9 ·
Relativity according to Dr. Wayne Dyer
- Ivan Seeking
- · Replies 4 ·
Graduate Is Cross-Posting Allowed on PF Forums?
- gptejms
- · Replies 10 ·
Graduate Does Andromeda's approach slow down time due to its gravity?
- Quantum1332
- · Replies 3 ·
Graduate How to travel faster than light - why wont this work?
- Erazman
- · Replies 2 ·
Graduate Trying to understand gravitomagnetism
- koroljov
- · Replies 10 ·
Graduate In What Frame Is (t2 - t1)^2 Measured?
- Best of the Worst
- · Replies 3 ·
High School Perception vs Reality: Why Does the Moon's Shadow Look Wrong?
- Farsight
- · Replies 8 ·
Graduate What evidences of relativity do you find the most compelling
- TheAntiRelative
- · Replies 59 ·
Graduate Twin paradox asymmetry due to reference frame choice, not acceleration
- Al68
- · Replies 104 ·
Undergrad Does light travel at different speeds?
- Burnsys
- · Replies 7 ·
Graduate What is Lorentz' Ether? Lorentz' ether
- professor
- · Replies 12 ·
Undergrad Einstein energy versus thermodynamic energy
- Iraides Belandria
- · Replies 2 ·
Graduate Why is dark matter needed if energy relates to gravity like mass does?
- professor
- · Replies 1 ·
Graduate Birkhoff's theorem with cosmological constant
- pervect
- · Replies 0 ·
Graduate How Do Light Cones Behave Near a Black Hole's Event Horizon?
- discjockey
- · Replies 2 ·
High School How would you define a proper physical quantity?
- bernhard.rothenstein
- · Replies 4 ·
Graduate Special Relativity Clock Challenge
- RelativeQuanta
- · Replies 1 ·
Graduate What does interference in time mean for light waves?
- anuj
- · Replies 13 ·
Graduate How Does Curved Spacetime Influence the Path of Light and Objects in Space?
- Nim
- · Replies 2 ·
Graduate Can Light Curve Space-Time and Create a Gravity Well?
- mdj
- · Replies 2 ·
Graduate Deriving a spacetime metric from a null geodesic in Euclidean space
- mikeu
- · Replies 12 ·
Graduate Does an accelerating observer see Doppler or gravitational redshift?
- Oxymoron
- · Replies 37 ·
Graduate When and where will ship A turn around according to an observer on earth?
- Al68
- · Replies 18 ·
Graduate Gravity - Integrating General Relativity with Gravitons
- Hacky
- · Replies 15 ·
Advertising very bad sites on relativity
- clj4
- · Replies 2 ·
Graduate How Does Time Dilation Work and Can Someone Explain the Twin Paradox?
- Best of the Worst
- · Replies 5 ·
Undergrad Why don't all massive objects collide?
- toddman
- · Replies 3 ·
Graduate Is It Possible to Derive the Lorentz Transformations from a Simple Axiom?
- lemma28
- · Replies 19 ·
High School Why doesn't light go through walls then?
- disregardthat
- · Replies 24 ·
Graduate The interaction between two electriferous particles
- dreamsfly
- · Replies 10 ·
Undergrad Are you younger at the equator due to time dilation from Earth's rotation?
- Quantum1332
- · Replies 7 ·
Undergrad Why does the twin paradox not violate the relativity principle?
- John_M
- · Replies 54 ·
Graduate If Time Is The Fourth Dimension
- Vosh
- · Replies 10 ·
Graduate What are the effects of higher derivatives in the slow-motion approach?
- eljose
- · Replies 1 ·
Graduate Does gravity affect light speed and can light be stopped by gravity?
- jay_598
- · Replies 14 ·
Undergrad Gamma Rays: Faster than Light?
- Quantum1332
- · Replies 3 ·
Graduate Can Two Airships Achieve Superluminal Speed with Elastic Material?
- Strategiest
- · Replies 3 ·
Graduate Why Do You Travel Into The Future As You Approach The Speed Of Light?
- Silverbackman
- · Replies 14 ·
Graduate Conceptualizing higher dimensions
- jasc15
- · Replies 3 ·
Graduate Thermodynamic - conservation of energy/mass problem, I can't figure it out
- BrianConlee
- · Replies 4 ·
Graduate Virtually indestructible materials, say adamantium.
- jay_598
- · Replies 5 ·
Graduate Composition of Lorentz Transformations
- Hacky
- · Replies 5 ·
Graduate Why is a wire with a current not charged?
- Zaigon
- · Replies 14 ·
Graduate Why Did Einstein Choose the Riemann Tensor for General Relativity?
- eljose
- · Replies 10 ·
Undergrad Learning special relativity in my physics class
- Ajoo
- · Replies 3 ·
Graduate Can Twisting a Rod Allow Faster-Than-Light Communication?
- hkazmi
- · Replies 10 ·
Graduate Theoretical experiment on relativity
- drme1981
- · Replies 3 ·
Graduate Explaining EM, Weak & Strong Interactions in 4D Spacetime
- sruthisupriya
- · Replies 1 ·
Undergrad Physics Q: Travel Faster than Light? E=MC^2?
- Universe_Man
- · Replies 4 ·
Graduate Equations for time travel and traversable wormhole theories
- imperium2600
- · Replies 3 ·
Graduate At what mass does an object start to noticeably bend light?
- Bladibla
- · Replies 3 ·
Graduate Inertial Frames distinguished by proper times
- yogi
- · Replies 83 ·
Graduate How does the Mössbauer effect verify that falling photons gain energy mgh?
- sruthisupriya
- · Replies 4 ·
Graduate What,s the energy of the gravitational field?
- eljose
- · Replies 2 ·
Graduate Can you travel a light-year in less than a year using charged repulsion?
- Enos
- · Replies 13 ·
Graduate Why does light travel backwards in this experiment?
- theCandyman
- · Replies 2 ·
Graduate Attempting to Understand Alcubierre
- McC
- · Replies 4 ·
Graduate Interaction Energy how does it transform between inertial frames?
- Abu Abdallah
- · Replies 3 ·
Graduate A Serious Question from an Educated Layman
- AgnosticPriest
- · Replies 51 ·
Graduate Ellis on an evolving block universe (gr-qc/0605049)
- robphy
- · Replies 4 ·
Graduate How Do Particle Physicists Measure the Relativistic Energy of Tardyons?
- bernhard.rothenstein
- · Replies 5 ·
Graduate What is the dimension of the spacetime interval?
- neutrino
- · Replies 10 ·
Undergrad Why does a falling object accelerate if spacetime is curved?
- eep
- · Replies 16 ·
High School What is a Simple Explanation of General Relativity for High School Students?
- pettysm
- · Replies 5 ·
Graduate Penrose Diagram for Schwarzschild
- coalquay404
- · Replies 3 ·
Graduate Where does a laser beam reflect in an accelerating spaceship?
- kuahji
- · Replies 10 ·
Undergrad Are matter and energy the same thing according to E=mc²?
- Universe_Man
- · Replies 84 ·
Graduate See-saw problem in special relativity
- chaah
- · Replies 10 ·
Graduate Aether theories which are experimentally indistinguishable from SR.
- quantumdude
- · Replies 176 ·
Graduate What is the Gravitational Acceleration Beyond the Event Horizon of a Black Hole?
- kuahji
- · Replies 3 ·
Undergrad Can gravity bend the path of light?
- Chaos' lil bro Order
- · Replies 16 ·
Graduate Relativistic momentum definition
- bernhard.rothenstein
- · Replies 14 ·
Graduate Can We Measure the Elusive Gravitational Waves?
- ragingsamster
- · Replies 6 ·
Graduate Can Approaching the Speed of Light Prohibit Time Travel?
- ohlhauc1
- · Replies 22 ·
High School Photon and electron racing show
- AlienUFO
- · Replies 3 ·
Undergrad Hypothetical Question. Creating Gravity and power supplies
- scifigeek
- · Replies 6 ·
Graduate Do black holes connect to the Big Bang through time travel?
- Rameusb5
- · Replies 4 ·
Undergrad Understanding Newton's Laws in Non-Inertial Reference Frames
- pkc111
- · Replies 2 ·
Graduate How does light travel at a constant speed without mass or inertia?
- Mt. Nixion
- · Replies 5 ·
Graduate What Are the Absorption Peaks of Gravitational Radiation Passing Through Earth?
- pervect
- · Replies 3 ·
Graduate Mass in Relativity: Bucherer's Experiment Result
- bernhard.rothenstein
- · Replies 5 ·
Graduate Can an object become a black hole by reaching 99.9% the speed of light?
- Giulio B.
- · Replies 1 ·
Graduate What is the D'Alembert operator
- SeReNiTy
- · Replies 4 ·