this post was submitted on 09 Jul 2026
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Careful with those absolute statements there buddy. I was told the same by a teacher, who challenged the class to come up with natural examples of either straight lines or perfect circles. He talked about how such things cannot exist because at high enough resolution/magnification there will always be interruptions.
Your own example of light traveling in straight lines doesn't account for the fact that photons are waves and absolutely do not travel in straight lines.
they do tavel in a perfectly straight line though.
space time is curved, not the light path.
I don’t think that’s right because they are affected by gravity, even if ever so slightly
But isn't the gravity bending the space, so the light itself is travelling straight but seems curved to the observer?
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"