{"id":223,"date":"2018-08-16T08:35:50","date_gmt":"2018-08-16T08:35:50","guid":{"rendered":"https:\/\/live-optics-wp.pantheonsite.io\/oscoutreach\/?p=223"},"modified":"2023-11-14T20:48:18","modified_gmt":"2023-11-14T20:48:18","slug":"color-mixing","status":"publish","type":"post","link":"https:\/\/wp.optics.arizona.edu\/oscoutreach\/color-mixing\/","title":{"rendered":"Color Mixing"},"content":{"rendered":"\n<p><strong>Overview<\/strong>: The primary colors for light are red, green, and blue, and the addition of all three creates white light.&nbsp; RGB pixels are used in displays to create the breadth of colors in an image or movie.<br>\u200b\u200b<strong>Supplies<\/strong>: Red, green, and blue flashlights, smooth white screen<br><strong>Objectives<\/strong>: How do we make white light? How are different colors formed? How do screens (phones, tablets, televisions) produce all of the colors we can see?<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\" \/>\n\n\n\n<p><strong>Setup<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Turn on the red, green, and blue lights<\/li>\n\n\n\n<li>Direct the flashlights onto a white screen or the light bank on to a smooth wall in the room<\/li>\n\n\n\n<li>If necessary, align the lights such that the three colors overlap and create white light!<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2018\/08\/IMG_8148-e1538807499741-1024x1024.jpg\" alt=\"\" class=\"wp-image-227\" srcset=\"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2018\/08\/IMG_8148-e1538807499741-1024x1024.jpg 1024w, https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2018\/08\/IMG_8148-e1538807499741-150x150.jpg 150w, https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2018\/08\/IMG_8148-e1538807499741-300x300.jpg 300w, https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2018\/08\/IMG_8148-e1538807499741-768x768.jpg 768w, https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2018\/08\/IMG_8148-e1538807499741-90x90.jpg 90w, https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2018\/08\/IMG_8148-e1538807499741-75x75.jpg 75w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2018\/08\/IMG_8149-e1538807566926-1024x1024.jpg\" alt=\"\" class=\"wp-image-228\" \/><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2018\/08\/IMG_8153-e1538806256740-1024x1024.jpg\" alt=\"\" class=\"wp-image-229\" srcset=\"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2018\/08\/IMG_8153-e1538806256740-1024x1024.jpg 1024w, https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2018\/08\/IMG_8153-e1538806256740-150x150.jpg 150w, https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2018\/08\/IMG_8153-e1538806256740-300x300.jpg 300w, https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2018\/08\/IMG_8153-e1538806256740-768x768.jpg 768w, https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2018\/08\/IMG_8153-e1538806256740-90x90.jpg 90w, https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2018\/08\/IMG_8153-e1538806256740-75x75.jpg 75w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n<p><strong>How to run the demo:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Turn off the lights in various combinations to show different color combination mixing<\/li>\n\n\n\n<li>Move the screen closer and further from the light source to show spot light of colors or mixing to form white light <\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\" \/>\n\n\n\n<p><strong>What&#8217;s Happening?<\/strong><\/p>\n\n\n\n<p>This form of color mixing is called additive mixing, where the combination of primary colors (red, green, and blue) creates white light.&nbsp; Note that this is different than subtractive mixing; we experience subtractive mixing with paint and inkjet printers, where the combination of primary colors (cyan, yellow, magenta) creates black paint.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"220\" height=\"165\" src=\"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2018\/08\/Color-Mixing.jpg\" alt=\"\" class=\"wp-image-810\" \/><\/figure>\n<\/div>\n\n\n<p><strong>Try this:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use a pixel viewer and look at a tablet screen. Can you see the RGB pixels? Do different brands of phones look different? What about OLED vs. LED screens?<\/li>\n\n\n\n<li>Stand in front of the white light and check out your shadow.&nbsp; You should see additional cyan, yellow, and magenta shadows!<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image is-resized\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2018\/08\/Color-Mixing-1024x768.png\" alt=\"\" class=\"wp-image-317\" style=\"aspect-ratio:1.3333333333333333;width:443px;height:auto\" srcset=\"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2018\/08\/Color-Mixing-1024x768.png 1024w, https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2018\/08\/Color-Mixing-300x225.png 300w, https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2018\/08\/Color-Mixing-768x576.png 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<hr class=\"wp-block-separator has-css-opacity\" \/>\n\n\n\n<p><strong>Additional setups available:<\/strong><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"200\" src=\"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2018\/08\/IMG_8067-300x200.jpg\" alt=\"\" class=\"wp-image-226\" style=\"aspect-ratio:1.5\" srcset=\"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2018\/08\/IMG_8067-300x200.jpg 300w, https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2018\/08\/IMG_8067-768x512.jpg 768w, https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2018\/08\/IMG_8067-1024x683.jpg 1024w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"638\" src=\"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2023\/04\/Screenshot-2023-04-12-at-2.54.02-PM-1024x638.png\" alt=\"\" class=\"wp-image-915\" style=\"aspect-ratio:1.6050156739811912;width:469px;height:auto\" srcset=\"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2023\/04\/Screenshot-2023-04-12-at-2.54.02-PM-1024x638.png 1024w, https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2023\/04\/Screenshot-2023-04-12-at-2.54.02-PM-300x187.png 300w, https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2023\/04\/Screenshot-2023-04-12-at-2.54.02-PM-768x478.png 768w, https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2023\/04\/Screenshot-2023-04-12-at-2.54.02-PM-1536x957.png 1536w, https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-content\/uploads\/sites\/75\/2023\/04\/Screenshot-2023-04-12-at-2.54.02-PM-2048x1275.png 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\" \/>\n\n\n\n<p><strong>Learn more:<\/strong> (external links)<\/p>\n\n\n\n<p><a href=\"https:\/\/phet.colorado.edu\/en\/simulation\/color-vision\">Color Vision &#8211; PhET Interactive Simulation<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Learn how to make every color in the spectrum with only three colors of light.<\/p>\n","protected":false},"author":43,"featured_media":228,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-223","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-everyday-optics"],"_links":{"self":[{"href":"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-json\/wp\/v2\/posts\/223","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\/43"}],"replies":[{"embeddable":true,"href":"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-json\/wp\/v2\/comments?post=223"}],"version-history":[{"count":17,"href":"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-json\/wp\/v2\/posts\/223\/revisions"}],"predecessor-version":[{"id":1130,"href":"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-json\/wp\/v2\/posts\/223\/revisions\/1130"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-json\/wp\/v2\/media\/228"}],"wp:attachment":[{"href":"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-json\/wp\/v2\/media?parent=223"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-json\/wp\/v2\/categories?post=223"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wp.optics.arizona.edu\/oscoutreach\/wp-json\/wp\/v2\/tags?post=223"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}