Monday, May 21, 2018

Rotating black holes and optical gravity

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https://en.wikipedia.org/wiki/Ergosphere Optical gravity explains in a simple way the ergosphere of a rotating black hole. If we have an o...
Monday, May 14, 2018

Frame dragging explains the movement of a black hole in optical gravity

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Our blog post on April 26, 2018 left open the problem how black holes can orbit in optical gravity if the local speed of light is zero. ht...
Saturday, May 12, 2018

Why do closed loop Feynman integrals diverge?

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We will now tackle the main problem that has been vexing quantum field theorists for the past 85 years - divergent integrals and renormaliza...
Thursday, May 10, 2018

Is a Schwinger process possible for a gravitational field?

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In the Schwinger process, a strong static electric field creates electron-positron pairs. If the electric field exceeds 10^18 V/m, the Schwi...
Wednesday, May 9, 2018

No paradox of reflected waves in a uniform gravitational field

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Our discussion in the previous blog post raised the following question: Paradox 1.  Static observers in a homogeneous uniform gravitationa...
Friday, May 4, 2018

Erik Verlinde's entropic gravity and optical gravity

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Erik Verlinde has suggested that gravity is not a "fundamental force", but guided by entropy. Erik P. Verlinde On the Origin o...

Can a time-varying gravitational field produce photons?

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Our critique of Hawking radiation contains a conjecture that a time-varying gravitational field cannot produce photons if there is no ordina...