Reply to post: Re: today tomorrow

Three certainties in life: Death, taxes and the speed of light – wait no, maybe not that last one

Danny 14 Silver badge

Re: today tomorrow

or perhaps our current "vacuum" isn't a vacuum at all, perhaps it has something that we haven't detected yet, but this "something" was more/less abundant previously. Thus in the same way light is altered by the refractive index, this "something" also has a refractive index that is negative to our eyes (or rather our definition of a vacuum being 1 is wrong)

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