How rainbows with NO COLOR are possible

What the heck are spider-web rainbows? What are these rare white rainbows, and how do they form?

If you liked this video check out these:
Does this look WHITE to you?
https://www.youtube.com/watch?v=uNOKWoDtbSk
The Projector Illusion:
https://www.youtube.com/watch?v=Xp6bxCh_p7c

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Creator/Host: Dianna Cowern
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Sources:
The mathematical physics of rainbows and glories
John A. Adam
https://ww2.odu.edu/~jadam/docs/rainbow_glory_review.pdf

Raindrop and mist droplet sizes:
https://www.nasa.gov/feature/goddard/2016/size-matters-nasa-measures-raindrop-sizes-from-space-to-understand-storms

https://www.usgs.gov/special-topic/water-science-school/science/are-raindrops-shaped-teardrops?qt-science_center_objects=0#qt-science_center_objects
https://www.atoptics.co.uk/droplets/clouds.htm
https://www.nist.gov/system/files/documents/el/fire_research/R0200514.pdf
https://adele.faculty.ucdavis.edu/research/projects/cloud-dsd/
https://www.atoptics.co.uk/droplets/fogform.htm
http://hyperphysics.phy-astr.gsu.edu/hbase/atmos/fogbow.html
http://media.bom.gov.au/social/blog/1807/explainer-what-is-fog/
http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/opt/mch/diff.rxml

Screenshotted articles about Fogbows/White Rainbows
https://www.realsimple.com/holidays-entertaining/entertaining/seasonal-events/white-rainbow

Видео How rainbows with NO COLOR are possible канала Physics Girl