{"product_id":"glass-prism-45-45-90-degrees","title":"Glass Prism 45-45-90 Degrees","description":"\u003ch2\u003eA right-angled glass prism - the one that bends light through 90 degrees\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eSolid glass prism. Right-angle sides 5.4cm, hypotenuse 7cm, 3.8cm thick.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA 45-45-90 prism does two things an equilateral prism cannot. Point white light through the sloping face and you get a spectrum, same as any prism. But send light in square through one of the short faces and it turns a clean right angle by total internal reflection - no silvering, no mirror, just glass and geometry. That is how periscopes and binoculars work, and seeing it happen in a solid block is more convincing than being told.\u003c\/p\u003e\u003cp\u003eSolid glass, not acrylic, so it stays clear and does not scratch to a haze after a term of being handled.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eThese are made by hand,\u003c\/strong\u003e so the supplier warns dimensions vary slightly between pieces. If you need a matched set for a measuring exercise, tell us and we will ask before shipping.\u003c\/p\u003e","brand":"MTA Essentials","offers":[{"title":"Default Title","offer_id":53792744866155,"sku":"EVNK11701","price":16.5,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/2795\/8891\/files\/nk11701_prism-90x45x45-degrees.webp?v=1788351976","url":"https:\/\/megaofficesupplies.com.au\/products\/glass-prism-45-45-90-degrees","provider":"Mega Office Supplies","version":"1.0","type":"link"}