Supernumerary rainbow
Taken by Nicolas SOLDATI on May 23, 2020 @
Fribourg, Switzerland
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Camera Used: FUJIFILM GFX 50S
Exposure Time: 1/80
Aperture: f/5.6
ISO: 100
Date Taken: Unavailable
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Details:
"In certain circumstances, one or several narrow, faintly coloured bands can be seen bordering the violet edge of a rainbow; i.e., inside the primary bow or, much more rarely, outside the secondary. These extra bands are called supernumerary rainbows or supernumerary bands; together with the rainbow itself the phenomenon is also known as a stacker rainbow. (...) Supernumerary rainbows cannot be explained using classical geometric optics. The alternating faint bands are caused by interference between rays of light following slightly different paths with slightly varying lengths within the raindrops. Some rays are in phase, reinforcing each other through constructive interference, creating a bright band; others are out of phase by up to half a wavelength, cancelling each other out through destructive interference, and creating a gap. (...) Supernumerary rainbows are clearest when raindrops are small and of uniform size. The very existence of supernumerary rainbows was historically a first indication of the wave nature of light, and the first explanation was provided by Thomas Young in 1804." (source:Wikipedia)
This rare phenomenon lasted only 2 minutes. I unfortunately did not have the opportunity to chose a better foreground. But I am still very happy that I have been able to see the spectacle and could immortalise the phenomenon from the window of my appartement.
Photographer's website:
https://soldati.org
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