Uploaded February 2020 | Updated September 2026, 3 weeks ago
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?
youtube.com/watch?v=uNOKWoDtbSk
The Projector Illusion:
youtube.com/watch?v=Xp6bxCh_p7c
Special thanks to our Sally Ride level patrons: Alejandro Gutierrez, Brian O'Connell, Darkbit, Dave Butler, David Cichowski, Edi, Fabrice Eap, Henning Bitsch, Kenneth Hunter, Margaux Lopez, and Zalster.
Join the Physics Girl Patreon community! ►► patreon.com/physicsgirl
Thanks to: Brussels Airport (@BrusselsAirport) / Twitter, NWS Key West (@NWSKeyWest) / Twitter, Phil Plait (@BadAstronomer), Chris Cox, (c) Timm Chapman - www.timmchapman.com, Alex Tudorica, Colin Leonhardt at Birdseye View Photography, Craig Gardner (@rcraiggardner) / Twitter, Pascal (@Pascal_Brunet) / Twitter, Fabio de Albuquerque (@fabio914) / Twitter, Justin Hoover (@baselogik) / Twitter, Kayden Morrison.
physicsgirl.org
twitter.com/thephysicsgirl
facebook.com/thephysicsgirl
instagram.com/thephysicsgirl
Creator/Host: Dianna Cowern
Editor: Levi Butner
Production Assistance: Heather Dewis
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:
nasa.gov/feature/goddard/2016/size-matters-nasa-measures-raindrop-sizes-from-space-to-understand-storms
usgs.gov/special-topic/water-science-school/science/are-raindrops-shaped-teardrops?qt-science_center_objects=0#qt-science_center_objects
atoptics.co.uk/droplets/clouds.htm
nist.gov/system/files/documents/el/fire_research/R0200514.pdf
https://adele.faculty.ucdavis.edu/research/projects/cloud-dsd/
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
realsimple.com/holidays-entertaining/entertaining/seasonal-events/white-rainbow
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?
youtube.com/watch?v=uNOKWoDtbSk
The Projector Illusion:
youtube.com/watch?v=Xp6bxCh_p7c
Special thanks to our Sally Ride level patrons: Alejandro Gutierrez, Brian O'Connell, Darkbit, Dave Butler, David Cichowski, Edi, Fabrice Eap, Henning Bitsch, Kenneth Hunter, Margaux Lopez, and Zalster.
Join the Physics Girl Patreon community! ►► patreon.com/physicsgirl
Thanks to: Brussels Airport (@BrusselsAirport) / Twitter, NWS Key West (@NWSKeyWest) / Twitter, Phil Plait (@BadAstronomer), Chris Cox, (c) Timm Chapman - www.timmchapman.com, Alex Tudorica, Colin Leonhardt at Birdseye View Photography, Craig Gardner (@rcraiggardner) / Twitter, Pascal (@Pascal_Brunet) / Twitter, Fabio de Albuquerque (@fabio914) / Twitter, Justin Hoover (@baselogik) / Twitter, Kayden Morrison.
physicsgirl.org
twitter.com/thephysicsgirl
facebook.com/thephysicsgirl
instagram.com/thephysicsgirl
Creator/Host: Dianna Cowern
Editor: Levi Butner
Production Assistance: Heather Dewis
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:
nasa.gov/feature/goddard/2016/size-matters-nasa-measures-raindrop-sizes-from-space-to-understand-storms
usgs.gov/special-topic/water-science-school/science/are-raindrops-shaped-teardrops?qt-science_center_objects=0#qt-science_center_objects
atoptics.co.uk/droplets/clouds.htm
nist.gov/system/files/documents/el/fire_research/R0200514.pdf
https://adele.faculty.ucdavis.edu/research/projects/cloud-dsd/
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
realsimple.com/holidays-entertaining/entertaining/seasonal-events/white-rainbow


![Work and Energy - Physics 101 / AP Physics 1 Review with Dianna Cowern
Lesson 9 (Work and Energy) of Diannas Intro Physics Class on Physics Girl. Never taken physics before? Want to learn the basics of physics? Need an AP Physics 1 review before the exam? This course is for you!
Exercises in this video:
1. A rocket pushes a space cow, from rest, with a Force of 100N, over a distance of 10m. How much work did the rocket do? What is the final kinetic energy of the cow? How fast is the cow moving?
2. You lift a 10kg cow, with a constant velocity, 10m up. How much work did you do? How much potential energy is stored in the gravitational field?
3. You drop the cow 10m onto a big cow airbag. How fast was the cow moving right before she hit the airbag? How fast would a cow with twice as massive be moving with the same setup?
4. A giant wrecking ball with 80kg mass, is dropped from a height of 35m. It bounces off of a trampoline and reaches a height of 14m on the return trip. How much energy was lost to heat in the bounce?
5. A square cow slides down a frictionless ramp, starting at a height h above the ground. At the bottom the cow starts sliding along the ground. How far does the cow slide, in terms of m, g, h, and u, where u is the coefficient of friction between the cow and the ground? [u is mu]
Special thanks to Mark Rober for his encouraging shoutout and to Simone Giertz for letting me almost hit myself in the face with a bowling ball at her workshop.
Credits:
Dianna Cowern - Executive Producer/Host/Writer
Jeff Brock - Lead Writer/Course Designer
Laura Chernikoff - Producer
Kaitlyn Ali - Video Editor
Sophia Chen - Researcher/Writer
Erika K. Carlson - Researcher/Writer
Hope Butner - Production Assistant
Levi Butner - Videographer
Lauren Ivy - Set Design
Vanessa Hill - Consulting Producer
Aleeza McCant - Illustrator
Rachel Allen - Illustrator
Consultant - Kyle Kitzmiller
Lucy Brock, Samantha Ward - Curriculum Consultants
Cathy Cowern - Transcription Work and Energy - Physics 101 / AP Physics 1 Review with Dianna Cowern](https://i.ytimg.com/vi/rKwK06stPS8/mqdefault.jpg)






![The universe is SPEEDING UP
This never-before-seen footage of Dianna was taken when we went to Mammoth California to film two videos about the expansion of the universe. Dianna is still sick and wont return for a long time, so enjoy this science explanation like the good old days.
If you want to support Dianna during her recovery, you can do so on Patreon where we post content like this more often. → [https://www.patreon.com/physicsgirl]
Watch the full video - https://www.youtube.com/watch?v=q67vH0SKahU&ab_channel=PhysicsGirl
2nd video - https://www.youtube.com/watch?v=I9q-7GPQr1Y&ab_channel=PhysicsGirl
Special thank you to our X-Ray tier patrons: Anton Ragin, Lydia Fullard, zoddy, dheeraj mekala, David Johnston, Christopher Kemsley, Adrian Archuleta, Zoran Dekic, Austin Rose, Gnare, Bazinga_X, Gil Chesterton, Mike Schneider, marcss, James Prokop, Carlos Patricio, Tommy Joseph, jeremy glowacki, Vishal Bedi, Matt Kaminski, Andrew Herstek, Vincent Argiro, Eddie Sabbah, Patrick Olson, Chris Wyma, Zalster, David Cichowski, Vikram Bhat, Margaux Lopez, Edi, Kenneth Hunter, Fabrice Eap, Joe Pacheco
Creator/Host: Dianna Cowern
Editor: Levi Butner
http://physicsgirl.org/
http://twitter.com/thephysicsgirl
http://facebook.com/thephysicsgirl
http://instagram.com/thephysicsgirl
Music provided by APM
https://www.apmmusic.com/ The universe is SPEEDING UP](https://i.ytimg.com/vi/sOhdQNjmK_U/mqdefault.jpg)
