Recent content by James Hasty

I agree this works, but only because you have defined the convention for the 1-way speed of light in both directions.

The purpose of my post was to demonstrate a way to synchronize two clocks located in the same inertial frame. I thought this would be simple enough. But what you have taught me is that IF light is anisotropic, some kind of convention must be established for the speed of light in one direction...

Let's be clear on definitions: The 2WSOL can be calculated by timing a reflected light beam using 1 clock. For example: A sends a signal to point B, it is reflected back to A. Tee speed of light is calculated: c = 2L / ( t[A2] - t[A1] ). It is the same for all observers. The 1WSOL cannot be...

An observer can only know that if the 1WSOL is isotropic. I am assuming it is not.

That is for the 2WSOL (2-way round trip of light), which is a given because it is true. I am assuming the 1WSOL is anisotropic.

In the introduction, "it is given" that the average speed of light is c for the 2WSOL . Then t[B2] - t[B1] = 2L/c.

ASSUMPTIONS 1. Two identical clocks A and B in the same inertial frame are stationary relative to each other a fixed distance L apart. Time passes at the same rate for both. 2. Both clocks are able to send/receive light signals and to write/read the send/receive times into signals. 3. The...

My viewpoint is that for all inertial observers with Minkowski coordinates, Maxwell's equations posit the speed of light to be isotropic. But YES, I agree with your comments. Thank you.

It may be shown from the equations of electromagnetism, by James Clerk Maxwell in the 1860’s, that the speed of light in the vacuum of free space is related to electric permittivity (ϵ) and magnetic permeability (μ) by the equation: c=1/√( μ ϵ ) . This value is a constant for the vacuum of...

Thank you all for your replies.

Evidently this has been proven possible. See the following article: Tang, BY., Tian, M., Chen, H. et al. Demonstration of 75 km-fiber quantum clock synchronization in quantum entanglement distribution network. EPJ Quantum Technol. 10, 50 (2023). https://doi.org/10.1140/epjqt/s40507-023-00207-9

Given two quantum entangled particles A and B, let each be located inside one of two identical clocks. Let each clock be set to zero time the instant either particle A or B is measured or changes state. Could this mechanism be utilized to synchronize the clocks?

Thank you.

I have Google searched for "Anderson's kappa" but not readily found. What specifically is it?

Very good points, thanks all of you for your comments. I know it took time out of your days to respond back to me, and I appreciate it. (I have learned along the way.) Thanks again. Live long and prosper.