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The linked video mentions the expansion of the universe, and relativity.
by geon 8y ago
The linked video mentions the expansion of the universe, and relativity.
- raattgift 8y agoJust to follow-up on my longer reply above: the solar system is not expanding. So within the solar system, there should be exact conservation of energy. (And we do test this in many ways, and it holds up). The metric expansion only operates on scales much larger than that of the solar system (and even larger than that of the Milky Way and its collection of nearby neighbours). (One can take a theory other than General Relativity and finely-tune the expansion of the solar system to match the null results on measures of it, and this is done in some quintessence and other models, but this won't help one do away with exact conservation of energy at scales of EmDrives; or give much room to have more energy moving into (or out of) a boundary drawn outside the solar system and the wider universe).