{"id":1343,"date":"2023-12-04T15:34:27","date_gmt":"2023-12-04T15:34:27","guid":{"rendered":"https:\/\/live-optics-wp.pantheonsite.io\/oscoutreach\/?p=1343"},"modified":"2024-03-18T19:26:29","modified_gmt":"2024-03-18T19:26:29","slug":"newton-rings","status":"publish","type":"post","link":"https:\/\/wp.optics.arizona.edu\/oscoutreach\/newton-rings\/","title":{"rendered":"Newton Rings"},"content":{"rendered":"\n<p><strong>Overview<\/strong>: A convex lens is placed against a flat plate and illuminated with white or monochromatic light. Concentric rings appear as the result of thin film interference in the air wedge between the two elements.<\/p>\n\n\n\n<p><strong>Supplies:<\/strong>\u00a0Newton ring apparatus &#8211; 2 glass plates in a frame with 3 adjustment screws, monochromatic light<\/p>\n\n\n\n<p><strong>Objectives:<\/strong> View the interference rings and how they change by adjusting the 3 screws.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p><strong>Setup:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Place the ring demos on the table<\/li>\n\n\n\n<li>Turn off the room lights<\/li>\n\n\n\n<li>Turn on the monochromatic light<\/li>\n<\/ul>\n\n\n\n<p><strong>How to run the demo:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Adjust the knobs to adjust the sizes of the rings<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"400\" height=\"267\" src=\"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2024\/03\/newtonsrings26-crop-400x267-1.jpg\" alt=\"\" class=\"wp-image-1661\" srcset=\"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2024\/03\/newtonsrings26-crop-400x267-1.jpg 400w, https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2024\/03\/newtonsrings26-crop-400x267-1-300x200.jpg 300w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/figure>\n<\/div>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p><strong>What\u2019s Happening?<\/strong><\/p>\n\n\n\n<p>Waves reflecting from two surfaces can interfere constructively and destructively. In the Newton ring demo, light waves are being reflected at glass\/air and air\/glass interfaces. The interference produces a concentric ring pattern of rainbow colors in white light, or dark and light rings in monochromatic light.<\/p>\n\n\n\n<p>This phenomenon can be explained through thin film interference. The glass pieces in the apparatus are pressed together, with one convex glass piece and the other flat. There exists a thin film of air between the two glass pieces, which has a thickness of zero where the two glass pieces touch, but then increase the further away from the point of contact it is.\u00a0  Adjustment screws are tightened to secure intimate contact at the center.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"229\" height=\"49\" src=\"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2024\/03\/newtonsrings002.gif\" alt=\"\" class=\"wp-image-1660\" \/><\/figure>\n<\/div>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p><strong>Learn more:<\/strong>&nbsp;(external links)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Rings are caused by reflections between two touching surfaces<\/p>\n","protected":false},"author":130,"featured_media":1344,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-1343","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-physical-optics"],"_links":{"self":[{"href":"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-json\/wp\/v2\/posts\/1343","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-json\/wp\/v2\/users\/130"}],"replies":[{"embeddable":true,"href":"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-json\/wp\/v2\/comments?post=1343"}],"version-history":[{"count":4,"href":"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-json\/wp\/v2\/posts\/1343\/revisions"}],"predecessor-version":[{"id":1664,"href":"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-json\/wp\/v2\/posts\/1343\/revisions\/1664"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-json\/wp\/v2\/media\/1344"}],"wp:attachment":[{"href":"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-json\/wp\/v2\/media?parent=1343"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-json\/wp\/v2\/categories?post=1343"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-json\/wp\/v2\/tags?post=1343"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}