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Ultra high vacuum isn't vacuum. Achieving an actual vacuum is practically impossible in my understanding. Even in deep space you will probably have a few stray
by Intermernet 8y ago
Ultra high vacuum isn't vacuum. Achieving an actual vacuum is practically impossible in my understanding. Even in deep space you will probably have a few stray hydrogen atoms floating around.
- v_lisivka 8y agoYes, this is problem, but two 200W lasers[0] separated by thousands of kilometres are able to filter out noise created by atoms or electrons easily. Moreover, 200W of energy applied to single atom will put away it from path of laser very quickly. At such powers and precision we may need to take into account flow of neutrino. It's possible that distant event created blast of neutrinos, which affected speed of light in vacuum. [0]:https://www.ligo.caltech.edu/page/laser https://www.ligo.caltech.edu/page/laser