915
I must con(FeS₂), this sparked a laugh
(lemmy.nz)
A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.

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Hmm, I’m not actually sure. Are we also ignoring refraction and reflection because the path is straight between those? If we’re talking discrete photons, you may be correct about each segment in its path being perfectly straight, but I’m not a theoretical physicist.
"through vacuum"