{"product_id":"linear-polarizing-filter-sheet-20-20cm-optical-grade","title":"Linear Polarizing Filter Sheet — 20×20cm, Optical Grade","description":"\u003cp\u003e\u003cstrong\u003ePolarized light is the key to understanding reflection, glare, liquid crystals, stress birefringence, and atmospheric optics.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eLight from the sun scattered at 90° is nearly 100% polarized — you can verify this with two polarizers. Rotate one 90° relative to the other and they become opaque: this is Malus's law. The same principle drives LCD displays, polarized sunglasses, and optical mineralogy. One sheet becomes a pair of crossed polarizers; add a stressed plastic object between them and watch strain patterns emerge in brilliant colour.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSize: 20×20cm | Transmission: ~40% for matched polarization\u003c\/li\u003e\n\u003cli\u003eOptical-grade linear polarizer film\u003c\/li\u003e\n\u003cli\u003eExtinction ratio: \u0026gt;500:1\u003c\/li\u003e\n\u003cli\u003eCut to any size required\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cem\u003eEvery purchase directly funds independent physics research at the Golden Physics Project.\u003c\/em\u003e\u003c\/p\u003e","brand":"Golden Physics Project","offers":[{"title":"Default Title","offer_id":54143204589860,"sku":"GPP-POLAR-FILTER","price":24.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1007\/2879\/9524\/files\/Polarizer_Through_Glass.jpg?v=1780563284","url":"https:\/\/shop.goldenphysics.org\/products\/linear-polarizing-filter-sheet-20-20cm-optical-grade","provider":"Golden Physics Project","version":"1.0","type":"link"}