Physics Frontiers

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Natural Sciences
**Physics Frontiers**

Jim Rantschler and Randy Morrison discuss physics from elementary particles to cosmological effects at the limits of our theoretical knowledge or have recently emerged.

Latest Episodes:

Electromagnetic Gravitational Repulsion Aug 17, 2020

Show notes

Randy tells Jim about ways in which electromagnetism reduces the gravitational attraction caused by a body.

Sterile Neutrinos Jul 08, 2020

Show notes

Jim and Randy discuss the hypothesis of sterile neutrinos, neutrinos that are even more ghostly than neutrinos that are dark matter candidates.

Gravitational Wave Astronomy Jun 10, 2020

Show notes

Jim and Randy talk about gravitational waves.

X17 May 03, 2020

Show notes

Jim and Randy discuss a possible "fifth force," the hypothetical X17 particle that has been seen in several experiments.
Erratum: The g-2 of the muon was shown to be off by 1 part in 500,000 in 2001 at Brookhaven. It may not be in there, I'm not sure how much of that I cut out.
Show Notes: http://frontiers.physicsfm.com/50

The Unruh Effect Apr 04, 2020

Show notes

Jim and Randy discuss the apparent creation of quanta seen by comparing the viewpoints of relatively accelerating observers -- the Unruh Effect.
(There is a little noise that shows up on Randy's track half way through - I did my best)
Show Notes: http://frontiers.physicsfm.com/49
(links to papers, podcasts, and more!)

The Gertsenshtein Effect Jan 19, 2020

Show notes

Randy introduces Jim to the Gertsenshtein effect, the conversion of gravitational waves to electromagnetic waves through resonances.
Show Notes: http://frontiers.physicsfm.com/48

Bimetric Gravity Nov 24, 2019

Show notes

Randy introduces Jim to Sabine Hossenfelder's bimetric theory of gravity. In this gravitational theory, there are two types of matter whose only interaction is through gravitation. However, each one reacts to space-time differently, resulting in different metric tensors for each. In low-curvature situations, this creates a kind of anti-gravitation.
Show Notes: http://frontiers.physicsfm.com/47

Wigner's Friend Sep 22, 2019

Show notes

Randy and Jim discuss experiments that purport to show that there is no such thing as objective reality.
Show Notes: http://frontiers.physicsfm.com/46

Loop Quantum Gravity Aug 16, 2019

Show notes

Jim and Randy discuss loop quantum gravity, and integration of quantum mechanics and gravity that quantizes space-time itself through the use of uncertain quanta of volumes and the random connections between them.

Spooky Action at a Distance Jul 16, 2019

Show notes

Jim and Randy discuss experiments that put a minimum superluminal speed of communication between parts of a wavefunction.
Show Notes: http://frontiers.physicsfm.com/44

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