How are we sure that speed of light and other basic constants are really constants on a large cosmological scale of time and space? Submitted by The_Dark_Passenger93 t3_zckx8p on December 4, 2022 at 8:39 PM in askscience 44 comments 66
araujoms t1_iyzd37j wrote on December 5, 2022 at 8:43 AM Be careful to reformulate your question in terms of dimensionless constants. Changing those has observational consequences. Changing the value of dimensionful constants, like the speed of light, is meaningless. Permalink 2
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