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
Undergrad Meaning of frames in relativity
- Lakshminarayanan.V
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Graduate Energy of motion at high speed
- lechiffre
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Graduate Trying to track down one of the popular physics books
- lechiffre
- · Replies 2 ·
Graduate Does gravity contract length in general relativity?
- yourdadonapogostick
- · Replies 9 ·
Undergrad What Makes the Speed of Light and Gravity So Fascinating?
- Saiarii
- · Replies 14 ·
Graduate What's the difference between Lorentz covariance and invariance?
- Ratzinger
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Undergrad Does Magnetism Curve Space and Time
- gonegahgah
- · Replies 14 ·
Graduate Can Time Dilation be Determined in a Constantly Accelerating Frame?
- Aer
- · Replies 74 ·
Undergrad Measurements of time/distance be dependent on an object's velocity
- jason_one
- · Replies 21 ·
Graduate Why does light behave differently than a bouncing ball on a moving train?
- Ar edhel
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Undergrad What is the shape of a black hole and how does it appear from behind?
- izzie
- · Replies 8 ·
Graduate Does time dilation apply to matter without using light clocks?
- Päällikkö
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Graduate Can virtual produce anti-gravity?
- wangyi
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Graduate Can closed timelike curves allow time travel in general relativity?
- moving finger
- · Replies 157 ·
Graduate Special Relativity in a Parallel Universe
- Perspicacious
- · Replies 41 ·
Graduate Does the Inverse Lorentz Function Model Space-Time Curvature Inversion?
- Orion1
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Graduate Questions about energy conditions
- haushofer
- · Replies 23 ·
Graduate Ricci components in Schwarzschild solution
- rickphysics
- · Replies 13 ·
Graduate Interactive animation for Schwarzschild black hole orbits
- George Jones
- · Replies 3 ·
Graduate Question 10 of relativity quiz: can accelerating Stella call herself at rest?
- εllipse
- · Replies 43 ·
Undergrad Does artificial gravity cause a spinning spaceship to tilt and tumble?
- Atma1001
- · Replies 6 ·
Graduate Schwarzschild metric assistance
- lurathis
- · Replies 20 ·
Graduate Speed of Light: If You're in a Spaceship, Would Results Be Skewed?
- Atma1001
- · Replies 4 ·
Graduate Is Gravity Really a Force Keeping Us on Earth?
- UrbanXrisis
- · Replies 19 ·
Undergrad Einstein's View of Gravity in Solar Systems
- tino lin
- · Replies 16 ·
Graduate Strength of materials and special relativity
- 69Mustang
- · Replies 2 ·
Graduate Can pressurized gas create artificial gravity in spacecraft?
- gonzo
- · Replies 13 ·
Graduate Is it possible to know the future through a biological mechanism?
- Arctic Fox
- · Replies 40 ·
Graduate What Happens to Time Dilation at Constant Speeds like 50% of C?
- apophis924
- · Replies 7 ·
Graduate Is the Center of a Black Hole a Point in Time or Space?
- cangus
- · Replies 5 ·
Graduate Why does light slow in glass if the speed of light is constant?
- Dr.Brain
- · Replies 45 ·
Graduate How Do Dimensions and Euclidean Geometry Relate to Spheres in Higher Dimensions?
- mewmew
- · Replies 6 ·
Undergrad How would you explain the Special Theory of Relativity using Physics?
- Gamecubesupreme
- · Replies 10 ·
Graduate What Does the Derivative of the Lorentz Gamma Function Indicate?
- Orion1
- · Replies 2 ·
Graduate Can Matter from a Black Hole's Singularity Travel Back to Our Timeframe?
- PhilipF
- · Replies 3 ·
Graduate Why backward time travel creates a logical paradox
- Mentat
- · Replies 173 ·
Graduate A New Concept of what Gravity really is?
- Francium
- · Replies 6 ·
Graduate Question pertaining measurement and space
- BigM69
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High School Can We Really Change Time Through Speed?
- DopeyGuy
- · Replies 5 ·
Graduate Relativity vs. QMwhich is more fundamental
- metrictensor
- · Replies 13 ·
Graduate Solve Momentum to Get Gamma in Relativity Theory
- gunblaze
- · Replies 7 ·
Graduate Does Lorentz Force Change in Moving Frames?
- metrictensor
- · Replies 19 ·
Graduate Faster than light communication
- robousy
- · Replies 8 ·
Graduate Walking the wrong way through a wormhole?
- hexhunter
- · Replies 8 ·
Graduate Can Time Travel Take You Anywhere in the Universe?
- Art
- · Replies 10 ·
Graduate Graviton and general relativity
- Ratzinger
- · Replies 17 ·
Undergrad I am going to do a presentation on time-travel tomorrow.
- Gamecubesupreme
- · Replies 6 ·
Undergrad Why is the speed of light squared in E=mc²?
- Nusc
- · Replies 18 ·
Undergrad How does time dilation work at relativistic speeds?
- DeeBee
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Graduate Travelling at the speed of light
- Art
- · Replies 11 ·
Graduate What is the difference between special and general relativity?
- IndustriaL
- · Replies 25 ·
Graduate How Can an MMx Interferometer Test Photon Behavior in a Gravitational Field?
- yogi
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Graduate Twin paradox with Doppler-shifted laser signals
- TheAntiRelative
- · Replies 39 ·
Graduate What is the Structure of Classical General Relativity?
- wolram
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Undergrad Accelaration is equal to gravity
- paulhunn
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Graduate Is Spacetime Unique to Relativity or Present in Quantum Mechanics?
- Gammaboy
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What if time was round like a circle?
- philster
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Graduate Time dilation explanation in Discover article on light speed
- Zardoz
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Graduate Can we see light from stars beyond the Hubble distance?
- marlon
- · Replies 30 ·
Graduate Is Earth's Gravitational Pull Just a Pseudo Force?
- Dr.Brain
- · Replies 18 ·
High School What is relativistic energy?
- Honorable_Death
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Graduate How do you tell t-zero from T in the Lorentz time dilation formula?
- Moe_the_Genius
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Graduate Relativistic mass, how did Einstein thought of it?
- misogynisticfeminist
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Graduate Why Does an Object Fall Toward a Star Without Gravity?
- dodo
- · Replies 16 ·
Graduate What Are the Differences Between Electric and Magnetic Field 4-Vectors?
- Mortimer
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High School E = MC2 - how was it initially proven?
- WarrickF
- · Replies 22 ·
Graduate Consequences of LT on Length and Photons
- DougBTX2
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Graduate Einstein's 1905 Papers: A Revolutionary Accomplishment
- jdavel
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Graduate Could the universe's acceleration be caused by time speeding up?
- |2eason
- · Replies 28 ·
Graduate Coriolis effect on a rotating disc in the equivalence principle
- nwall
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Graduate Why doesn't the twin paradox work in the spacecraft's reference frame?
- abercrombiems02
- · Replies 9 ·
Graduate Sure this is easy for you but I dont understand
- Neitrino
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Graduate Is GR a wrong apparoach to gravitation?
- Juan R.
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Graduate Pressure and refraction in GR?
- cefarix
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Graduate What are the functions of Boyer-Linquist coordinates?
- Moore1879
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High School Time dilation and the twin paradox in special relativity
- Gamecubesupreme
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Graduate Einsteins though experiment and e=mc^2
- uraknai
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Graduate Humans have true 4D spatial vision
- Mortimer
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Undergrad Light Beam Problem: What Will Happen?
- Temporarily Blah
- · Replies 6 ·
Undergrad What did Newton mean about infinite speed signals and gravitational forces?
- Dr.Brain
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Graduate Why ether proves speed of light?
- Oerg
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Graduate What is the relationship between virtual time and black holes?
- Sarahchichi
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Undergrad Throwing relativity out the window
- eNathan
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Graduate GR vs. SR while accelerating away
- gonzo
- · Replies 15 ·
Graduate Questions about spacetime curvature, orbits, black holes and gravity
- gaugeboson
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Graduate E=mc^2 no object with rest mass can ever reach the speed of light?
- eNathan
- · Replies 17 ·
Graduate How do we express Maxwell's equations in terms of the field tensor?
- meteorologist1
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Graduate Calculating Curvature of Space-Time for a Body of Mass
- Enos
- · Replies 4 ·
Graduate Does the cosmological constant change in higher dimensions?
- General_Relativity21
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Graduate Confusion between horizon, particle horizon and event horizon
- emanaly
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Undergrad Kinetic Energy Change in Particle: Earth vs Space Observation
- HungryChemist
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Graduate Length contraction at 0.9c with light travel time delay
- bayan
- · Replies 8 ·
Graduate Can a rotating rod exceed the speed of light?
- T-O7
- · Replies 2 ·
Undergrad Understanding Radar Guns and Speed Measurement with STR
- O Great One
- · Replies 8 ·
Graduate Is a free ballistic path a parabola or a cycloid?
- Zanket
- · Replies 28 ·
Graduate Radial fall time in Schwarzschild metric from Lagrangian
- Romeo
- · Replies 6 ·
High School What is Einstein's Twin Paradox and how does it illustrate time dilation?
- boy genius
- · Replies 2 ·
Graduate How can the Planck length be defined if lengths are relative in special relativity?
- Curious6
- · Replies 5 ·
Graduate How would you create a stable wormhole and know where it leads?
- boy genius
- · Replies 10 ·
Graduate Tramplines and Scales and Free Float
- shibbysan
- · Replies 5 ·