RE: The universe appears "old", but it is still less than 10,000 years old
November 27, 2013 at 8:23 pm
(This post was last modified: November 27, 2013 at 8:23 pm by Optimistic Mysanthrope.)
(November 27, 2013 at 12:32 pm)orogenicman Wrote: Yes it is, because there is only one observer, not two. The experiments for two-way speed of light measures the round trip speed of light between two points, hence the synchronization issue. This experiment eliminates that problem by only using one point of measurement. In other words, the starting and stopping point is at the same location, thus there is no synchronization issue. That they used mirrors to get the light back to the origin is irrelevant to the measurement because light reflecting off of a mirrored surface doesn't change velocity, only vector direction. That the entire apparatus rotates and they get the same results verifies the Michelson-Morley experiment. You should also read the last link.
The last link takes you to the same paper as the second link. The fact that the same location is used for emission and detection is irrelevant. If you shine a light onto a mirror and time how long it takes to get back to you, it is the two-way speed that is being measured. The light is going from point A (you) to point B (the mirror) and then back to A. It's a two leg journey. Adding more mirrors creates more points, not less.
The first paper is the more interesting one. It does actually test the one way speed, (which is nice) but the spinning holed discs do not remove the problem of synchronisation. It's still assuming an isotropic convention in regard to the photodiodes.
