{"id":49,"date":"2024-10-24T13:13:05","date_gmt":"2024-10-24T17:13:05","guid":{"rendered":"https:\/\/sites.temple.edu\/chemdemo\/?p=49"},"modified":"2024-10-25T16:22:14","modified_gmt":"2024-10-25T20:22:14","slug":"spectral-glasses","status":"publish","type":"post","link":"https:\/\/sites.temple.edu\/chemdemo\/2024\/10\/24\/spectral-glasses\/","title":{"rendered":"Spectral Glasses"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Materials<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Hydrogen tubes and other gas tubes with an excitor (located over Dr. Hill\u2019s desk)<\/li>\n\n\n\n<li>&#8220;Rainbow glasses&#8221; (3-D glasses found in the left bottom drawer or blue bin over Dr. Hill\u2019s desk)<\/li>\n\n\n\n<li>Colored filters (found in belly drawer of desk; filter paddles in blue bin)<\/li>\n\n\n\n<li>C-spectrum lens (available in blue bin)<\/li>\n\n\n\n<li>Sheets of C-spectrum film (on model boxes over Dr. Hill\u2019s desk)<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Procedure<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Observation of Visible Spectrum:<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Have students put on the &#8220;rainbow glasses.&#8221;<\/li>\n\n\n\n<li>Direct them to look at a single point source of light or lamp. They should see the visible spectrum.<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Using Colored Filters:<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Place a colored filter over the light source.<\/li>\n\n\n\n<li>Ask students to identify which line of the spectrum has disappeared.<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Hydrogen and Gas Spectra:<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Have students observe the distinct patterns of light generated by hydrogen and Kr\/Hg\/O2 spectra using the glasses.<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Teacher Lesson Plan: Diffraction <\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Objective<\/h2>\n\n\n\n<p>To understand the origins of colors in light, how colors combine to create various shades (including white light), and the effect of color filters on light.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Materials<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Overhead projector and three half-sheets of black construction paper (4-1\/4&#8243; x 11&#8243;)<\/li>\n\n\n\n<li>Diffraction grating (4&#8243; x 4&#8243;; source: Rainbow Symphony)<\/li>\n\n\n\n<li>Diffraction grating glasses (Rainbow Symphony)<\/li>\n\n\n\n<li>Colored gels or filter materials<\/li>\n\n\n\n<li>Light bulbs: 40 watt clear (preferably cooler), green, blue, red party bulbs, inexpensive bug light, small fluorescent night light<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Procedure<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Projecting White Light:<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Position the overhead projector at half the normal distance from the screen.<\/li>\n\n\n\n<li>Project white light onto the screen and discuss its makeup.<\/li>\n\n\n\n<li>Use the diffraction grating to create a color wash on either side of the projection window.<\/li>\n\n\n\n<li>Place the black construction paper to allow only a narrow strip of light through, noting the colors that emerge.<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Using Color Filters:<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Lay colored gels across the narrow slot to observe the effects of color filters on the projected light.<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Diffraction Grating Glasses:<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Distribute diffraction grating glasses to each student.<\/li>\n\n\n\n<li>Have them observe light from various sources (ceiling fixtures, windows, light bulbs) and log their observations.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Discussion Points<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Explain the differences in light appearance and how various colors bend through the diffraction grating.<\/li>\n\n\n\n<li>Discuss concepts of diffraction vs. refraction.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Resources<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Diffraction Grating Materials<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Rainbow Symphony Inc.<\/strong><\/li>\n\n\n\n<li>6860 Canby Ave. #120, Reseda, CA 91335<\/li>\n\n\n\n<li>Tel: (818) 708-8400<\/li>\n\n\n\n<li>Fax: (818) 708-8470<\/li>\n\n\n\n<li>Toll Free: (800) 821-5122<\/li>\n\n\n\n<li>Email: rainbowsymphony@rainbowsymphony.com<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Activity Workbook<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Color Analyzers<\/strong><\/li>\n\n\n\n<li>GEMS\/Lawrence Hall of Science, University of California, Berkeley, CA 94720<\/li>\n\n\n\n<li>Tel: (510) 642-7771<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Background Information<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sir Isaac Newton discovered that light consists of a spectrum of seven distinct visible colors, always appearing in the same order (Red, Orange, Yellow, Green, Blue, Indigo, Violet).<\/li>\n\n\n\n<li>Understanding that objects appear colored based on the light they reflect can help explain color perception.<\/li>\n\n\n\n<li>Note: Never look directly at the sun as it can cause eye damage.<\/li>\n<\/ul>\n\n\n\n<p>\u00a92007 Rainbow Symphony, Inc.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Materials Procedure Teacher Lesson Plan: Diffraction Objective To understand the origins of colors in light, how colors combine to create various shades (including white light),&#8230;<\/p>\n<div class=\"more-link-wrapper\"><a class=\"more-link\" href=\"https:\/\/sites.temple.edu\/chemdemo\/2024\/10\/24\/spectral-glasses\/\">Continue Reading<span class=\"screen-reader-text\">Spectral Glasses<\/span><\/a><\/div>\n","protected":false},"author":36673,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-49","post","type-post","status-publish","format-standard","hentry","category-demonstrations","entry"],"_links":{"self":[{"href":"https:\/\/sites.temple.edu\/chemdemo\/wp-json\/wp\/v2\/posts\/49","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sites.temple.edu\/chemdemo\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sites.temple.edu\/chemdemo\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sites.temple.edu\/chemdemo\/wp-json\/wp\/v2\/users\/36673"}],"replies":[{"embeddable":true,"href":"https:\/\/sites.temple.edu\/chemdemo\/wp-json\/wp\/v2\/comments?post=49"}],"version-history":[{"count":1,"href":"https:\/\/sites.temple.edu\/chemdemo\/wp-json\/wp\/v2\/posts\/49\/revisions"}],"predecessor-version":[{"id":50,"href":"https:\/\/sites.temple.edu\/chemdemo\/wp-json\/wp\/v2\/posts\/49\/revisions\/50"}],"wp:attachment":[{"href":"https:\/\/sites.temple.edu\/chemdemo\/wp-json\/wp\/v2\/media?parent=49"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sites.temple.edu\/chemdemo\/wp-json\/wp\/v2\/categories?post=49"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sites.temple.edu\/chemdemo\/wp-json\/wp\/v2\/tags?post=49"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}