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the claim

Light always travels in a straight line.

the verdict
CONTESTED PARTIAL
Recorded sources
3 sources for · 1 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that light always travels in a straight line?

Partly. One physics discussion states light travels in straight lines only in free space and bends in media or accelerating frames, and a paper describes light bullets following bent trajectories in free space. Other items assert light always moves in a straight line, but only as an assumption or in a non-mainstream framework.

Verdict: CONTESTED PARTIAL · 3 sources for, 1 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 3
Why does light always travel in a straight line?
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Why does light always travel in a straight line?. (n.d.). physics.stackexchange.com. https://physics.stackexchange.com/questions/71544/why-does-light-always-travel-in-a-straight-line

Evidence against · 1
Velocity and acceleration freely tunable straight-line propagation light bullet
2020
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Li, Z. & Kawanaka, J. (2020). Velocity and acceleration freely tunable straight-line propagation light bullet. doi.org. https://doi.org/10.1038/s41598-020-68478-1

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More for · 2
Collective collaboration for optimal path formation and goal hunting through swarm robot
2014
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Collective collaboration for optimal path formation and goal hunting through swarm robot. (2014). doi.org. https://doi.org/10.1109/confluence.2014.6949364

The motion of massless "object" and the physical essence and motion law of light
2023
Get citation
Jiqing, Z. & Tianhe, Z. (2023). The motion of massless "object" and the physical essence and motion law of light. zenodo.org. https://doi.org/10.5281/zenodo.7970312

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held for human review17 Oct 2026
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