1920's and 1930's
wow, that is amazing, since
The first laser was built in 1960 by Theodore H. Maiman at Hughes Research Laboratories, based on theoretical work by Charles Hard Townes and Arthur Leonard Schawlow.source
You can't go out and buy something like this.
hahahahahahahaha... go figure
Ah yes, it seems I misread. The early rings were interferometers, not laser rings. They used a light source, but the light source was not a laser. That's probably why they had to be so big, the light source was less accurate than a laser beam.
Thanks for the correction.
link your sources.
Here are a couple of sources to get you started:
https://physics.stackexchange.com/questions/338054/measuring-earth-rotation-rate-about-its-axis-with-gyroscopes
http://www.phys.canterbury.ac.nz/ringlaser/about_us.shtml
Oh here is an interesting site: International Earth Rotation and Reference Systems Service
https://www.iers.org/IERS/EN/Home/home_node.html
all these sources force me to take it on faith.
they just say that it is so, and computer data can easily be corrupted (i am a computer scientist by trade).
but it is nice you finally admitted that gyroscopes don't move.
(of course it is completely proven that the guy in my first video with the gyroscope was a liar/fake... )
suppositions to explaining lack of something.
Those sources don't force you to take anything on faith. Rather, they encourage more research. This may require doing something other than watching flat earth youtube videos...gasp!! Good science requires you to go out and prove data is corrupted and/or faked. Simply claiming something may have been corrupted and/or faked is not enough.
So, science states that small mechanical gyroscopes do not move with the earth's rotation. Therefore, a small mechanical gyroscope not moving is not proof of a flat earth. All those videos of small mechanical gyroscopes not moving are misleading, a common tactic in flatland.
Maybe you should investigate things in real life, rather than taking on faith everything they tell you in flat earth videos.
Naaah, that would would be actually doing something. Better to sit back and watch some more videos that reinforce your delusional world view. Remember when the central tenant of your theory is a conspiracy, its not scientific.
Cheers!