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[–] 26 points 2 years ago (1 child)

maybe somebody else pointed this out:

Light ALWAYS travels in its idea of a straight-line.

Always.

It doesn't matter whether it is bent by gravity or refraction, from its perspective, it kept going straight.

Only an "outside viewer" sees any non-straight-line-ness being done, but the outside-viewer isn't seeing the curved-space or the curved-refractive-index that the photon saw.

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  • [–] 4 points 2 years ago*

    Well, kinda, but the trajectory of the photon is contracted into a single point from its POV. Whatever destination is has, it's already there as far as it's concerned. It doesn't experience time given that it's moving at the speed of light.

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