913
I must con(FeS₂), this sparked a laugh (lemmy.world)
submitted 1 month ago by to c/science_memes@mander.xyz
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[–] -1 points 1 month ago* (last edited 4 weeks ago) (2 children)

I don’t think that’s right because they are affected by gravity, even if ever so slightly

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  • [–] 24 points 1 month ago (1 child)

    But isn't the gravity bending the space, so the light itself is travelling straight but seems curved to the observer?

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  • [–] 4 points 1 month ago (1 child)

    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.

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  • [–] 12 points 1 month ago* (1 child)

    gravity isn't a force, it's the curvature of space-time itself.

    light follows a perfectly straight line through vacuum. the space itself isn't straight.

    like drawing a straight line on a flat paper, if you roll the paper, that line is still straight within it's medium.

    Newtonian gravity has been replaced by General relativity, and has been proven to be the correct model (at least more correct than Newtonian gravity).

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