{"product_id":"demonstration-diffraction-3-in-1","title":"Demonstration Diffraction 3 In 1","description":"For demonstrating the principle of diffraction grating and the way in which its properties are dependent upon the number of lines per unit length. Comprises a card mount 90 x 40 mm approximately with three 16 x 9 mm apertures, each containing a diffraction grating replica. The gratings are 100 lines \/ mm. 300 lines \/ mm and 600 lines \/ mm, respectively, and are protected by cover glasses.","brand":"Supertek Science","offers":[{"title":"Default Title","offer_id":49975057023253,"sku":"SPSPH30677","price":59.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0857\/4897\/3845\/files\/PH30677.jpg?v=1781497351","url":"https:\/\/unitedsupplycorp.com\/products\/demonstration-diffraction-3-in-1","provider":"United Supply Corp.","version":"1.0","type":"link"}