Special and General Relativity Forum

Post thread
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.
Undergrad Confused with Special Relativity
  • · Replies 8 ·
Replies
8
Views
2K
Graduate Need help with time dilation and length contraction.
  • · Replies 13 ·
Replies
13
Views
3K
Graduate Does Mass or Size Affect Curvation in Relativity?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Challenges in Merging GR and QM from a Lagrangian Perspective
  • · Replies 7 ·
Replies
7
Views
2K
Graduate Construct electromagnetic stress-energy tensor for a non-flat metric
  • · Replies 12 ·
Replies
12
Views
4K
High School Going the speed of light, possibly.
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Is Light Massless? Evidence & Experiments Explained
  • · Replies 13 ·
Replies
13
Views
3K
High School Time moves forward, what if you move UP or DOWN? Does time stop?
  • · Replies 11 ·
Replies
11
Views
3K
Graduate Unable to see how light's one-way speed can be c experimentally
  • · Replies 49 ·
2
Replies
49
Views
9K
Graduate Possible Exits Simultaneously in Two Positions: Explained
  • · Replies 8 ·
Replies
8
Views
2K
Graduate Relativity of Simultaneity Issue
  • · Replies 20 ·
Replies
20
Views
4K
Graduate Gravity: Warping of Space or Force?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Gravitating Perfect Fluid Solution & Mass/Energy Total
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Flat Spacetime at Event Horizon?
  • · Replies 14 ·
Replies
14
Views
3K
Graduate Thin rotating disc under constant acceleration.
  • · Replies 80 ·
3
Replies
80
Views
14K
Graduate Killing fields as eigenvectors of Ricci tensor
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Does the Vacuum Solution in General Relativity Hold in the Presence of Matter?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Galilean principle of relativity
  • · Replies 44 ·
2
Replies
44
Views
6K
Graduate A question about the equivalency principle
  • · Replies 14 ·
Replies
14
Views
3K
Graduate About c being constant and interaction at c.
  • · Replies 9 ·
Replies
9
Views
2K
Graduate Relativity and Distance Measurement in Physics | PF Community Discussion
  • · Replies 3 ·
Replies
3
Views
2K
Graduate How is the deficit angle due to a relativistic cosmic string derived?
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Question on General Relativity from a layperson
  • · Replies 15 ·
Replies
15
Views
3K
Graduate Is ruler or radar measurement more accurate in defining length in relativity?
  • · Replies 8 ·
Replies
8
Views
3K
Graduate Coordinate charts and open sets
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Explaining Time Dilation in a Simple Way
  • · Replies 9 ·
Replies
9
Views
2K
Graduate Geometrical meaning of Weyl tensor
  • · Replies 7 ·
Replies
7
Views
5K
Graduate Lorentz transformation for time - why the 'x' term?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate If time didn't exist could anything move or even happen?
  • · Replies 11 ·
Replies
11
Views
3K
Graduate Why Is Gravity Infinite at a Black Hole's Center but Zero at Earth's Center?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate What is the Effect of Motion on the Velocity Vector of Light?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Momentum of light sans Maxwell
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Is Relativistic Electromagnetism Affecting a Test Charge Above a Moving Wire?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Back with more relativity questions
  • · Replies 4 ·
Replies
4
Views
2K
Graduate How Would Physics Change Without Covariant and Contravariant Tensors?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad What is the significance of this equation on my t-shirt?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Question about symmetry of length contraction
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Does Length Contraction Occur If Measuring Tools Contract Equally?
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad Explanation of expanding universe
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Twin Paradox & Neutron Speeds: Questions Explored
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Stress–energy tensorT^uv in theory and in practice
  • · Replies 24 ·
Replies
24
Views
3K
Undergrad Equivalence Principle: Einstein's Dilemma
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Curious about gravitational sluing detail
  • · Replies 34 ·
2
Replies
34
Views
4K
Graduate What is the Definition of Continuity in Minkowski Space?
  • · Replies 5 ·
Replies
5
Views
2K
High School Can someone explain to me this about gravity please
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Time dilation and length contraction
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Magnetic Fields of a Relativistic Charged Particle
  • · Replies 6 ·
Replies
6
Views
5K
Undergrad Running at Different Speeds: Who Experiences Time Differently?
  • · Replies 5 ·
Replies
5
Views
2K
Graduate GR Text: Zee's Formulas & Where I'm Going Wrong
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Should photons be considered massless?
  • · Replies 38 ·
2
Replies
38
Views
6K
Graduate Lorentz Transformation: Derivation & Explanation
  • · Replies 1 ·
Replies
1
Views
2K
Graduate How to resolve the contradiction in twin clocks?
  • · Replies 119 ·
4
Replies
119
Views
17K
Graduate Electric Field Strength Conservation in Direction of Motion
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Time Dilation of Particles A & B in Gravitational Field
  • · Replies 3 ·
Replies
3
Views
1K
Graduate What is Gravitational Field Strength in General Relativity?
  • · Replies 22 ·
Replies
22
Views
4K
Undergrad Einstein's Theory: What Happens to Humans at 300,000 km/s?
  • · Replies 16 ·
Replies
16
Views
3K
Graduate Exploring the Milne Universe in 2D: Rindler Spacetime Comparison
  • · Replies 14 ·
Replies
14
Views
5K
Graduate Is Time Dilation the Key to Understanding Time Travel in Science Fiction?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Why Does Relativistic Kinetic Energy Differ at Low Velocities?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Timelike v. spacelike, is it arbitrary?
  • · Replies 177 ·
6
Replies
177
Views
17K
Graduate Understanding Relativity Through Spacetime Diagrams
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Tall rotating cylinder near a black hole
  • · Replies 34 ·
2
Replies
34
Views
5K
Graduate Approaching C in any direction?
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Gravitation: Experiments Proving Its Scope
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Understanding Light's Constant Speed in Special Relativity
  • · Replies 18 ·
Replies
18
Views
3K
Graduate Einstein & Simultaneity: Two Questions
  • · Replies 17 ·
Replies
17
Views
6K
Graduate Role of distance in defining simultaneity
  • · Replies 17 ·
Replies
17
Views
3K
Graduate Question about a general way to prove E^2 = (cp)^2 + (mc^2)^2
  • · Replies 18 ·
Replies
18
Views
4K
Graduate Continuously confused by Special Relativity
  • · Replies 12 ·
Replies
12
Views
3K
Undergrad Does time control light speed?
  • · Replies 5 ·
Replies
5
Views
3K
High School What causes weightlessness in a free fall?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Energy-mass equivalence simplification of equations?
  • · Replies 10 ·
Replies
10
Views
2K
Graduate About the convention of simultaneity
  • · Replies 21 ·
Replies
21
Views
4K
Graduate Regarding notation for Lorentz transformation
  • · Replies 11 ·
Replies
11
Views
3K
Graduate Is G a Function of R in Einstein's Field Equations?
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Geodesic Equation in Flat & Curved Spaces
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Proper Reference Frame -Accelerated observer
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Definition of the Einstein Tensor
  • · Replies 23 ·
Replies
23
Views
8K
Graduate Force on a particle , length contraction
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad What Would the Universe Look Like While Traveling Close to the Speed of Light?
  • · Replies 7 ·
Replies
7
Views
2K
Graduate Say I have my pen on my desk; does it describe a geodesic?
  • · Replies 9 ·
Replies
9
Views
2K
Graduate Do Frames Affect Dimensional Units?
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Calculating Invariant pT in 2->2 Processes
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Reason behind speed of em waves being constant
  • · Replies 25 ·
Replies
25
Views
4K
Graduate Can You Travel to the Roman Empire Using a Wormhole?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Contra-variant and Co-variant vectors
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Light wavelenths longer than diameter of black hole?
  • · Replies 15 ·
Replies
15
Views
3K
Graduate Relativity: Space & Time on a Tempurpedic Mattress?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Understanding Velocity & Relativity: A Physics-Fling
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Is There Springyness in Space? Examining the Possibility
  • · Replies 8 ·
Replies
8
Views
2K
Graduate Was Wald wrong? A question with the problem 4 in Chapter 6
  • · Replies 7 ·
Replies
7
Views
5K
Graduate I don't see the problem with action at distance
  • · Replies 12 ·
Replies
12
Views
3K
Graduate Blueshift at event horizon in rest and accelerated frames
  • · Replies 12 ·
Replies
12
Views
4K
Graduate Varying an Action in Zee's GR Book
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Linear Gravity Field - Lagrangian
  • · Replies 8 ·
Replies
8
Views
5K
Graduate Mass conservation charged dust
  • · Replies 30 ·
2
Replies
30
Views
5K
Graduate Measuring speed of light with enhanced detectors
  • · Replies 11 ·
Replies
11
Views
2K
Graduate Proving that the det of the Lorentz tensor is +1 or -1 (MTW p 89)
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Galaxies Rotate Fast: Gravitational Lens Effect
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Can someone travelling at c race a photon?
  • · Replies 13 ·
Replies
13
Views
3K