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.
Graduate Time & Space: Inseparable? Photon Existence?
  • · Replies 23 ·
Replies
23
Views
4K
Graduate Nature of Spacetime: Accepted View Explained
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Why nothing is observed going back in time
  • · Replies 16 ·
Replies
16
Views
6K
Graduate Changing the speed of light does nothing?
  • · Replies 22 ·
Replies
22
Views
6K
Graduate Cosmological constant as a perfect fluid
  • · Replies 2 ·
Replies
2
Views
4K
Undergrad Plot a point on Earth through the Universe
  • · Replies 6 ·
Replies
6
Views
4K
Graduate Differences between Lorentz scalars and Lorentz invariants
  • · Replies 3 ·
Replies
3
Views
5K
Graduate Question about Relativity and the apparent direction of light
  • · Replies 12 ·
Replies
12
Views
4K
Undergrad What is the effect of relativity on measurements in a moving universe?
  • · Replies 8 ·
Replies
8
Views
3K
Graduate Relativity Concerning Small Particles
  • · Replies 2 ·
Replies
2
Views
2K
Graduate How does photon gain its speed in no time?
  • · Replies 16 ·
Replies
16
Views
5K
Graduate Why does light have invarient speed?
  • · Replies 117 ·
4
Replies
117
Views
45K
Graduate Q about relativistic mass increase, starship
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Could general relativity be right simply because it explains gravity?
  • · Replies 16 ·
Replies
16
Views
6K
Graduate Tachyons & Photons: Time & Speed of Light
  • · Replies 21 ·
Replies
21
Views
8K
Graduate Why did Einstein postulate the theory of the speed of light in an at-rest frame?
  • · Replies 17 ·
Replies
17
Views
4K
Graduate Understanding Metric Tensor: Time & Spatial Coordinates and Indices
  • · Replies 4 ·
Replies
4
Views
3K
Graduate How Does Relativity Affect Our Perception of Light and Photons?
  • · Replies 32 ·
2
Replies
32
Views
10K
Graduate Blueshift + Classical Physics = Golden Ratio
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Can Relativity Account for the Age Difference in a Big Circle?
  • · Replies 7 ·
Replies
7
Views
3K
Undergrad Does gravity apply at very short distances?
  • · Replies 3 ·
Replies
3
Views
3K
Download Einstein's Essays from Annals of Physics
  • · Replies 1 ·
Replies
1
Views
3K
Graduate What Are the Hamilton-Jacobi Equations for General Relativity?
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Is this a suitable explanation of relativity?
  • · Replies 2 ·
Replies
2
Views
4K
Graduate Problem with equivalence principle.
  • · Replies 7 ·
Replies
7
Views
4K
Graduate Could time be movement in a 4th physical dimension?
  • · Replies 2 ·
Replies
2
Views
4K
Graduate Observed Time vs Observed Duration
  • · Replies 7 ·
Replies
7
Views
11K
Undergrad Time Dilation and space missions
  • · Replies 33 ·
2
Replies
33
Views
12K
Graduate Time slows down when you approach the speed of light?
  • · Replies 80 ·
3
Replies
80
Views
69K
Undergrad Preferred Coordinates: Definition & Overview
  • · Replies 9 ·
Replies
9
Views
6K
Graduate Proof of Lorentz Geom. Not Holding in All Acc. Frames - Example
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Is it not possible to travel in light speed?
  • · Replies 5 ·
Replies
5
Views
4K
Graduate Portal Discussion: Human at Speed of Light
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Co-Accelerating Ships: Explaining the Problem
  • · Replies 44 ·
2
Replies
44
Views
14K
High School Maximum Non-Relativistic Speed
  • · Replies 5 ·
Replies
5
Views
4K
Graduate How Does Change Relate to the Relativity of Time and Entropy?
  • · Replies 18 ·
Replies
18
Views
8K
Graduate A question about relativity theory?
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Einstein began looking for gravity in the electromagnetic waves
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Is the Schwarzschild radius always constant in black holes?
  • · Replies 8 ·
Replies
8
Views
3K
Graduate Relativity and my Intergalactic Space Race
  • · Replies 4 ·
Replies
4
Views
3K
Graduate How Do Different Velocities Affect Clocks in Special Relativity?
  • · Replies 10 ·
Replies
10
Views
5K
Graduate Light vs Non-EM Wave Velocity and Time Dilation
  • · Replies 10 ·
Replies
10
Views
3K
Graduate Simulation: ray of light near black hole
  • · Replies 4 ·
Replies
4
Views
6K
Graduate Where can I find translated versions of the original General Relativity papers?
  • · Replies 7 ·
Replies
7
Views
4K
Graduate The Twin Paradox: Why Does the Travelling Twin Age Less?
  • · Replies 25 ·
Replies
25
Views
10K
Undergrad The twins paradox and explanation
  • · Replies 22 ·
Replies
22
Views
6K
Graduate What is the Equation Relating Tardyon Components in Different Reference Frames?
  • · Replies 12 ·
Replies
12
Views
3K
Graduate Phase invariance of e.m. waves
  • · Replies 8 ·
Replies
8
Views
9K
Graduate Does Time Dilation Occur with Uniform Motion?
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Light Speed Paradox: Explaining Newtonic Physics
  • · Replies 14 ·
Replies
14
Views
6K
Undergrad What is the relative velocity of two observers with given object velocities?
  • · Replies 51 ·
2
Replies
51
Views
12K
Graduate Postulate and special relativity
  • · Replies 26 ·
Replies
26
Views
6K
Graduate Why Is the Riemann Tensor Contracted in the Einstein Field Equations?
  • · Replies 1 ·
Replies
1
Views
7K
Graduate From one space dimension to two space dimensions in special relativity
  • · Replies 8 ·
Replies
8
Views
6K
Graduate Just how many different theories of gravity are there?
  • · Replies 13 ·
Replies
13
Views
9K
Graduate Thoughts (of an amateur) on the Solution to the Twin Paradox
  • · Replies 10 ·
Replies
10
Views
4K
Graduate Stress energy tensor for rotating disc
  • · Replies 1 ·
Replies
1
Views
4K
Graduate How Does Speed Affect Time Dilation?
  • · Replies 17 ·
Replies
17
Views
5K
Graduate Deriving Length Contraction: Is There Another Way?
  • · Replies 8 ·
Replies
8
Views
8K
Graduate If you could make your mass=0, would you begin moving at c?
  • · Replies 7 ·
Replies
7
Views
3K
Undergrad Relativity Stumper for you Einsteins
  • · Replies 9 ·
Replies
9
Views
3K
Graduate Galilean vs Lorentz transformation equations
  • · Replies 8 ·
Replies
8
Views
10K
Graduate Is the direction of a pulse from a laser pen dependent on the observer?
  • · Replies 26 ·
Replies
26
Views
6K
Graduate How does the Gravitational Wave Rocket work?
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Gravitational Self-Interaction
  • · Replies 8 ·
Replies
8
Views
5K
Graduate Why can't we see objects fall into a black hole?
  • · Replies 6 ·
Replies
6
Views
4K
Download GR Video Lectures | Free Resources
  • · Replies 7 ·
Replies
7
Views
11K
Graduate Could a Special Mirror in Electromagnetic Waves Explain the Lorentz Factor?
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Is Gravity Just Another Form of Acceleration?
  • · Replies 18 ·
Replies
18
Views
8K
Graduate Where does time travel fastest? And a moving galaxy/light speed question.
  • · Replies 3 ·
Replies
3
Views
7K
Graduate Special Relativity: Explaining 4Potential as a 4Vector
  • · Replies 14 ·
Replies
14
Views
5K
Graduate How is time and space affected by the warps in General Relativity?
  • · Replies 16 ·
Replies
16
Views
5K
Graduate Can Kinetic Energy Differences Cause a Wormhole to Collapse in Science Fiction?
  • · Replies 1 ·
Replies
1
Views
3K
High School Does a sphere maintain its shape when viewed at high speeds?
  • · Replies 24 ·
Replies
24
Views
4K
High School What is Gravity? Understanding the Basics
  • · Replies 14 ·
Replies
14
Views
4K
Graduate New View on Gravity: Warped Space-Time Continuum
  • · Replies 25 ·
Replies
25
Views
5K
Graduate Gravitomagnetism and quantum theory of gravity?
  • · Replies 6 ·
Replies
6
Views
3K
Graduate What Happens to Aging in the Twin Paradox When Both Twins Accelerate?
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Formalizing Special and General Relativity: Axioms and Conservation Laws
  • · Replies 10 ·
Replies
10
Views
3K
Graduate What would the universe look like from the perspective of a photon observer?
  • · Replies 31 ·
2
Replies
31
Views
16K
Graduate Gravity Well & Speed of Light: Questions & Answers
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Gravitational force and density.
  • · Replies 6 ·
Replies
6
Views
3K
Undergrad Could a 6ft Object Hitting Earth at 99% Light Speed Destroy It?
  • · Replies 9 ·
Replies
9
Views
3K
Graduate Lorentz Transformation: Conservation of Inner Product?
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Kerr solution as complex transformation
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Do Photons Coexist in the Same Space?
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Must measurement of time reference light?
  • · Replies 13 ·
Replies
13
Views
5K
Graduate Relativistic velocity derivation under constant force
  • · Replies 6 ·
Replies
6
Views
8K
Graduate Space-time Fabric: how what and why it warps?
  • · Replies 10 ·
Replies
10
Views
7K
Graduate Energy in relation to space and time
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Current status of gravitational collapse (full quantum mechanical treatment).
  • · Replies 3 ·
Replies
3
Views
2K
Graduate The Effects of Gravitomagnetism on Surrounding Particles
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Is Gravity a Force? Modern Physics Explained
  • · Replies 7 ·
Replies
7
Views
49K
Graduate Schwarzschild solution and Machian variable G
  • · Replies 5 ·
Replies
5
Views
4K
High School Improper Length & Time Intervals
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Math of an accelerating spaceship
  • · Replies 7 ·
Replies
7
Views
5K
Undergrad When the revolution of the earth on its axis accelerates
  • · Replies 1 ·
Replies
1
Views
5K
Undergrad What is the Smallest Constant Measurement of Time in the Universe?
  • · Replies 13 ·
Replies
13
Views
3K
Undergrad Can Black Holes Accelerate Objects to Light Speed?
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Regarding the conversion of kinetic energy to mass
  • · Replies 14 ·
Replies
14
Views
7K