How to find Stress Patterns with Polarizing Filters

The first 1,000 people to use the link will get a 1 month free trial of Skillshare: https://skl.sh/thescienceasylum09221 Polarized sunglasses allow you to see the orientation of light. That combined with birefringence can help you see patterns of stress inside materials. But how does that work exactly? Correction Video about Safety Hammers: https://youtu.be/0tmLh_eSpQU Nick Lucid - Host/Writer/Editor/Animator ________________________________ VIDEO ANNOTATIONS/CARDS Optics Playlist: https://www.youtube.com/playlist?list=PLOVL_fPox2K-gSgkjpsXfS60FSniBsdSC ________________________________ RELATED YOUTUBE VIDEOS PhysicsGirl on Birefringence and Polarization: https://youtu.be/CSu0cV3fqi8 Smarter Every Day on Car Window Safety: https://youtu.be/0i5rycLJ3D8 ________________________________ SUPPORT THE SCIENCE ASYLUM Patreon: http://www.patreon.com/ScienceAsylum YouTube Membership: https://www.youtube.com/channel/UCXgNowiGxwwnLeQ7DXTwXPg/join Advanced Theoretical Physics (Paperback): http://www.lulu.com/shop/nick-lucid/advanced-theoretical-physics-a-historical-perspective/paperback/product-24250687.html Advanced Theoretical Physics (eBook): https://gumroad.com/l/ubSc Merchandise: http://shop.spreadshirt.com/scienceasylum/ ________________________________ HUGE THANK YOU TO THESE SUPPORTERS Asylum Orderlies: Dhruv Singhal, Medec Hurtz Einsteinium Crazies: Benjamin Sharef, Bosphorus, Eoin O'Sullivan, Ilya Yashin, Jonathan Lima, Joseph Salomone, Kevin Flanagan, OnlineBookClub.org, Sean K Plutonium Crazies: Al Davis, Compuart, Ellis Hall, Fabio Manzini, Kevin MacLean, Rick Myers, Vid Icarus Platinum Crazies: Bart Barry, Benjamin Reynolds, Clayton Bruckert, David Johnston, Jon Adams, Jonas Wepeel, Jonathan Reel, Joshua Gallagher, Marino Hernandez, Mikayla Eckel Cifrese, Mr. Orn Jonasar, Olga Cooperman, William Hutchison ________________________________ OTHER SOURCES http://hyperphysics.phy-astr.gsu.edu/hbase/phyopt/polar.html http://hyperphysics.phy-astr.gsu.edu/hbase/phyopt/polabs.html http://hyperphysics.phy-astr.gsu.edu/hbase/phyopt/biref.html https://depts.washington.edu/mictech/optics/me557/photoelasticity.pdf https://www.constructionspecifier.com/fully-tempered-glass-and-spontaneous-fracture/ https://www.viracon.com/wp-content/uploads/2020/03/VTT-009_QuenchPatternCharacteristics.pdf https://www.cardinalcorp.com/source/pdf/tsb/fg/FG01_01-2016.pdf ________________________________ LINKS TO COMMENTS https://www.youtube.com/watch?v=cP2uVarXi1A&lc=UgyLw8WliUI1Cd3cwjx4AaABAg https://www.youtube.com/watch?v=cP2uVarXi1A&lc=UgwV9v_CBovppDVoPeh4AaABAg https://www.youtube.com/watch?v=cP2uVarXi1A&lc=UgzOy_zMf87FaH8b7b54AaABAg ________________________________ CHAPTER TIME CODES 00:00 Cold Open 00:39 Polarization Explained 03:24 Birefringence Explained 04:18 Pattern Examples 05:18 Types of Glass 06:17 Breaking Glass 07:34 Summary 08:00 Sponsor Message 09:08 Outro 09:33 Featured Comment ________________________________ Corrections: 5:43 Just to clarify: Side windows and rear windshields of automobiles are tempered. Front windshields are annealed, specifically two pieces of annealed glass with plastic between them to hold it together.