Recent content by Spinnor

I think the book is based on a series of lectures he gave, Your questions my be answered by watching them. The arrows in question spin very fast but also shrink in length proportional to the 1/(length of the path)? If the path length difference is of order the wavelength of the light the...

Edit, after some thought I want to remove the power recycling mirror from the interferometer below. I think that will simplify my thought experiment. Assume we have a LIGO type interferometer which is adjusted so that all light exits the detector port. Fire a single short attenuated laser pulse...

That was part of the technical hurdles I suggested there might be. Preform the experiment in water or a small amount of smoke should do the trick?

Example of Femto-photography, I would like to know if I understand the results of a Femto-photography Michelson Morley interferometer thought experiment. From a Google search of Femto-photography, Femto-photography is a technique that visualizes the propagation of light at an incredibly high...

It should be easy to 100 percent clean your phone, I will grant you a reset probably gets you pretty close and is simple. My current phone was bought used through a 3rd party, it might have yuk in it? Maybe just a matter of taking it as a challenge and get to it. Thank you.

The paranoid in my head says they will install their own malware. 😬

My wife got a nice new used phone from a friend for me. Being paranoid I don't trust the phone. Google tells me that a factory reset will not necessarily rid the phone of possible evil malware. Further Google tells me there is a process "flash a new image on my phone bootloader mode" that should...

I think most of his students that sat through the Feynman lectures on physics would agree with you, I think he points this out in the last lecture?

I don't think it is, I think he represents this technique as basis of quantum electrodynamics but to be sure I would have to watch his Auckland lectures again.

In Feynman's The Strange Theory of Light and Matter the simple technique for calculating quantum amplitudes for simple optical phenomenon by adding arrows is given. Could that same technique in principle be used to calculate the amplitude for a photon to arrive at the detector port of the LIGO...

What is the state of the art, Google does not turn up much published work. I would like to be able to consider photon paths through LIGO. Thank you.

Take one of a pair of metal cones and put a coax cable sized hole in the center of that cone. Let the "tops" of the cones face each other separated a distance a fraction of the diameter of the metal cones. Take a coax cable and connect it to the hole of the one cone (from the "inside" of the...

Looks like the spray paint worked OK on the vertically oriented piece of wood in the picture. The surface with the imperfections is hidden, ignore? You can get a pretty good finish painting with a brush if you use an oil based product, sanding between coats, though the oil will really soak into...

Lettuce poked through the wire at beak level?

Would a trail of yummy treats leading to the far corners get her in the exploring mode?