Posts

spacetimecon
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Struggles with the Continuum - Conclusion

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  We've been looking at how the continuum nature…
spacetime7
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Struggles with the Continuum - Part 7

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  Combining electromagnetism with relativity and…
Schwarzschild
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Orbital Precession in the Schwarzschild and Kerr Metrics

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The Schwarzschild Metric A Lagrangian that can be used to describe…
spacetimetetrad
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Tetrad Fields and Spacetime

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A spacetime is often described in terms of a tetrad field, that…
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Relativity on Rotated Graph Paper

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This Insight is a follow up to my earlier tutorial Insight (Spacetime…
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Spacetime Diagrams of Light Clocks

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We demonstrate a method for constructing spacetime diagrams for…
spacetime4
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Struggles with the Continuum - Part 4

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  In this series we're looking at mathematical problems…
speedlightframe
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Why Is the Speed of Light the Same in All Frames of Reference?

The first thing to worry about here is that when you ask someone…
twinparadox
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A Geometrical View of Time Dilation and the Twin Paradox

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Based on the amount of questions we receive on the topic at Physics…
blockuniverse5
blockuniverse4
blockuniverse3
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Blockworld and its Foundational Implications Part 3: General Relativity and the Big Bang

  In parts 1 and 2 of this 5-part Insights series,…
blockuniverse2
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Blockworld and Its Foundational Implications Part 2: The Relativity of Simultaneity and Blockworld

  In part 1 of this 5-part Insights series, I introduced…
blockuniverse1
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Blockworld and Its Foundational Implications Part 1: Time Dilation and Length Contraction

  This is the first in a 5-part series of Insights…
gravity3
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Does Gravity Gravitate? Part 3 - The Wave

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  In the first two posts in this series, we looked…
lightspeedrod
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Can I Send a Signal Faster than Light by Pushing a Rigid Rod?

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One common proposal for achieving faster than light communication…
gravitate2
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Does Gravity Gravitate? Part 2

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  In the first post of this series, I talked about…
blockuniverse
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PF's policy on Lorentz Ether Theory and Block Universe

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What is the PF's policy on Lorentz Ether Theory and Block Universe? Debates…
gravitate
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Does Gravity Gravitate?

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  The title question of this article is one that…
spacetime4
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Struggles With the Continuum - Part 3

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  In these posts, we're seeing how our favorite theories…
speedoflight
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Why Does C Have a Particular Value, and Can It Change?

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Short answer: Because c has units, its value is what it is…
gravitywaves
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How Fast Do Changes in the Gravitational Field Propagate?

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General relativity predicts that disturbances in the gravitational…
relativitytherorm
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Relativistic Work-Kinetic Energy Theorem

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I was bothered for a long time by the reasons for the relativistic…
birktheo
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A Short Proof of Birkhoff's Theorem

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Birkhoff's theorem is a very useful result in General Relativity,…
spaceship
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What Is the Bell Spaceship Paradox, and How Is It Resolved?

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Bell describes two spaceships that start out at rest relative…
relmass
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What is relativistic mass and why it is not used much?

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It happens that the term relativistic mass is used, in particular…