Comments by "ke6gwf - Ben Blackburn" (@ke6gwf) on "Why No One Has Measured The Speed Of Light" video.

  1. There is no way that the speed of light could be variable, and it be impossible to measure that it was variable. Simple test setup: triangle formed by evacuated tubes, with beam splitter mirrors at each end of the base, and a single detector at the apex. Send in a beam at one end of the base and reflect it back from the other end, measuring the round trip the normal way, but also measuring the intervals at the apex detector, from when the beam entered, when it reflected off the far end, and the when it returned to the start. You then compare the measurements, of both directions of the light on the bounce via the apex detector, and also the round trip time via the standard detector. If all the readings match, then the speed of light is consistent. If you still don't trust it, add additional beam splitters along the length of the tube, with additional paths to the single detector, using optical means to get each path identical in length., and actually measure the time it takes both directions along the path. And if you still question it, then you turn the assembly to a different orientation and run the test again, and try a few different positions, and see if you get any changes in any readings. This setup removes any timing issues or signal differential issues or clock speed issues by simply having the detector at a point equidistant from both measuring points, I mean, why have two separate clocks? That's a requirement that makes it fail By giving the light multiple directions to change speed, and monitoring it at multiple points, you remove the ability of the light to sneak in one direction and go slow in a different direction, without being able to see it change, because you are measuring both the time to the far mirror, and the time to return. And as far as the delay in the wire being the same in the light, etc, send the sync pulse the opposite direction! Or in my setup, make the apex detector much further away than the length of the base, so that any speed difference would not simply cancel out. And since we are dealing with light pulses, not single photons, you can split off some photons, so observation is non destructive. Since the hypothesis is that either the speed is different because of some sort of Aether headwind or tailwind, or going with the grain or against the grain, or something external like that, by doing a triangle, and moving it to different positions, and measuring the light at several points in its travel, you will be changing the orientation of the beams in relation to whatever that external force is, thus changing some measurement. If you are going to say that maybe the external force changes to ensure that round trip time is always the same, but one leg is faster than the other, so somehow all these legs at different angles to each other are magically all delayed the same way, now you are outside science and into superstition and magic, that somehow the Force knows that you are trying to measure it and so hides it's presence. This actually sounds a lot like the Flat Earth philosophy, that if I can't prove something, than you must be right. Yes, the sun COULD be a giant chandelier, and yes,light COULD magically change speed, but if light DID change speed, someone would have noticed it in some experiment along the way. All that said, just as light travels at a different speed through a vacuum or through gas, or different densities of glass, etc, I would not be surprised if its speed is also effected by other radiation and energy types, so it probably does go at a different speed, say, AWAY from the Sun as Towards the sun, because there are tail winds so to speak, but that it's a very minor change that doesn't effect anything any more than the slight variation in density in a length of fiber optic cable from where the guy at the kiln sneezed. And, yes, you could measure that too. 3 satellites near the sun forming a triangle, each with lasers and mirrors and detectors, comparing the reflected to the origin time, with the viewed from the apex time, and then trying it in the opposite direction. You may not be able to get exact speed measurements, but you can see if the relative measurements change based on direction of travel, and whether it is reflected or direct. So, good click bait video, but I am kind of surprised that neither of you stepped back and looked beyond the restrictions of two timers.
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