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the claim
Supernumerary rainbows are caused by interference between rays of light inside raindrops
the verdict
SUPPORTED
the evidence backs this
refutedsupported
the weight of evidence
3 sources for · 0 against

Supernumerary rainbows are indeed caused by the interference of light waves following internal reflection within raindrops, a phenomenon explained by wave optics and Airy theory.

Evidence for · 3
Physically Based Rendering of Rainbows under Various Atmospheric Conditions
2010 · cited by 6
Paper 3 notes that atmospheric optical phenomena like rainbows and supernumerary bows are governed by wave optics, interference, and dispersion.
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The analysis

The retrieved literature consistently supports the wave-optical and interference-based mechanism of supernumerary rainbows. Paper 3 and 11 detail how interference and wave optics (as opposed to pure geometric optics) account for supernumerary bows, and Paper 8 discusses the interference phenomena of internal rays in spherical particles. No papers contradict the claim.

More for · 2
High-order rainbows of a spherical particle produced by near-grazing incident light.
2017 · cited by 0
Paper 8 discusses high-order rainbows and how intensity oscillations are produced by interference of rays within spherical particles.
Mie Theory, Airy Theory, and the Natural Rainbow
1997 · cited by 0
Paper 11 reviews the history and principles of rainbow theory, highlighting Airy's interference and diffraction theory as explaining the finer features of natural rainbows.
The paper trail · every fact has a biography
first checked04 Aug 2026
judged → SUPPORTED · 8004 Aug 2026
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