{"id":1019,"date":"2018-02-12T12:34:00","date_gmt":"2018-02-12T17:34:00","guid":{"rendered":"http:\/\/coolscienceexperimentshq.com\/?p=1019"},"modified":"2023-10-05T13:53:31","modified_gmt":"2023-10-05T17:53:31","slug":"ruler-changes-size","status":"publish","type":"post","link":"https:\/\/coolscienceexperimentshq.com\/ruler-changes-size\/","title":{"rendered":"Index of Refraction &#8211; Ruler Changes Size Science Experiment"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Would your eyes fool you? Don&#8217;t be too quick to blame them! But if it&#8217;s not our eyes, then why does the ruler look wider in this science experiment?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Print our materials list and experiment instructions, preview our demonstration video, then learn how this experiment works with our easy to understand lesson on refraction.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"420\" src=\"https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Gets-Wider-Experiement-Step-5.jpg\" alt=\"Rule Gets Wider Experiment - Step 5\" class=\"wp-image-1134\" srcset=\"https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Gets-Wider-Experiement-Step-5.jpg 800w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Gets-Wider-Experiement-Step-5-600x315.jpg 600w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Gets-Wider-Experiement-Step-5-300x158.jpg 300w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Gets-Wider-Experiement-Step-5-768x403.jpg 768w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Gets-Wider-Experiement-Step-5-735x386.jpg 735w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\"><strong>JUMP TO SECTION:<\/strong>\u00a0<a href=\"https:\/\/coolscienceexperimentshq.com\/water-pour-into-glass\/#Instructions\" target=\"_top\" rel=\"noopener noreferrer\">Instructions<\/a>\u00a0|\u00a0<a href=\"https:\/\/coolscienceexperimentshq.com\/water-pour-into-glass\/#Video\" target=\"_top\" rel=\"noopener noreferrer\">Video Tutorial<\/a>\u00a0|\u00a0<a href=\"https:\/\/coolscienceexperimentshq.com\/water-pour-into-glass\/#Explanation\" target=\"_top\" rel=\"noopener noreferrer\">How it Works<\/a> | <a href=\"https:\/\/coolscienceexperimentshq.com\/product\/index-of-refraction-science-lab-kit\/\">Purchase Lab Kit<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Supplies Needed<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tall empty clear glass<\/li>\n\n\n\n<li>Water<\/li>\n\n\n\n<li>Cooking Oil<\/li>\n\n\n\n<li>Rubbing Alcohol<\/li>\n\n\n\n<li>Ruler<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group product-spotlight\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading\" style=\"text-transform:capitalize\"><strong>Index of Refraction Science Lab Kit &#8211; Only $5<\/strong><\/h3>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns reverse-mobile is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<figure class=\"wp-block-image alignfull size-large\"><a href=\"https:\/\/coolscienceexperimentshq.com\/product\/index-of-refraction-science-lab-kit\/\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2023\/10\/Index-of-Refraction-Lab-Kit-Product-Image-1024x1024.png\" alt=\"\" class=\"wp-image-3664\" srcset=\"https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2023\/10\/Index-of-Refraction-Lab-Kit-Product-Image-1024x1024.png 1024w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2023\/10\/Index-of-Refraction-Lab-Kit-Product-Image-600x600.png 600w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2023\/10\/Index-of-Refraction-Lab-Kit-Product-Image-150x150.png 150w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2023\/10\/Index-of-Refraction-Lab-Kit-Product-Image-300x300.png 300w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2023\/10\/Index-of-Refraction-Lab-Kit-Product-Image-768x768.png 768w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2023\/10\/Index-of-Refraction-Lab-Kit-Product-Image-1536x1536.png 1536w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2023\/10\/Index-of-Refraction-Lab-Kit-Product-Image-2048x2048.png 2048w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2023\/10\/Index-of-Refraction-Lab-Kit-Product-Image-400x400.png 400w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2023\/10\/Index-of-Refraction-Lab-Kit-Product-Image-125x125.png 125w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2023\/10\/Index-of-Refraction-Lab-Kit-Product-Image-100x100.png 100w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<p class=\"wp-block-paragraph\">Use our easy <a href=\"https:\/\/coolscienceexperimentshq.com\/product\/index-of-refraction-science-lab-kit\/\">Index of Refraction Science Lab Kit<\/a><a href=\"https:\/\/coolscienceexperimentshq.com\/product\/balloon-rocket-science-lab-kit\/\"> <\/a>to grab your students\u2019 attention without the stress of planning!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It\u2019s everything you need to&nbsp;<strong>make science easy for teachers and fun for students<\/strong>&nbsp;\u2014 using inexpensive materials you probably already have in your storage closet!<\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-fe48e5de wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-50 has-custom-font-size has-normal-font-size\" style=\"text-transform:uppercase\"><a class=\"wp-block-button__link has-background wp-element-button\" href=\"https:\/\/coolscienceexperimentshq.com\/product\/index-of-refraction-science-lab-kit\/\" style=\"border-radius:0px;background-color:#f04a24\"><strong>Buy Now<\/strong><\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><a id=\"Instructions\"><\/a>Ruler Changes Size Science Experiment Instructions<\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"420\" src=\"https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Gets-Wider-Experiement-Step-1.jpg\" alt=\"Rule Gets Wider Experiment - Step 1\" class=\"wp-image-1131\" srcset=\"https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Gets-Wider-Experiement-Step-1.jpg 800w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Gets-Wider-Experiement-Step-1-300x158.jpg 300w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Gets-Wider-Experiement-Step-1-768x403.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\"><strong>Step 1 &#8211;<\/strong> Pour water into a tall clear glass. Fill it about 1\/3 of the way full.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"420\" src=\"https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Gets-Wider-Experiement-Step-2.jpg\" alt=\"Rule Gets Wider Experiment - Step 2\" class=\"wp-image-1132\" srcset=\"https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Gets-Wider-Experiement-Step-2.jpg 800w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Gets-Wider-Experiement-Step-2-300x158.jpg 300w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Gets-Wider-Experiement-Step-2-768x403.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\"><strong>Step 2 &#8211;<\/strong> Next, carefully pour in cooking oil into the glass until the glass is a little less than 2\/3 of the way full.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"420\" src=\"https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Gets-Wider-Experiement-Step-3.jpg\" alt=\"Rule Gets Wider Experiment - Step 3\" class=\"wp-image-1135\" srcset=\"https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Gets-Wider-Experiement-Step-3.jpg 800w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Gets-Wider-Experiement-Step-3-300x158.jpg 300w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Gets-Wider-Experiement-Step-3-768x403.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\"><strong>Step 3 &#8211;<\/strong> Slowly pour rubbing alcohol into the glass until the glass is almost full of liquid.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"420\" src=\"https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Gets-Wider-Experiement-Step-4.jpg\" alt=\"Rule Gets Wider Experiment - Step 4\" class=\"wp-image-1133\" srcset=\"https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Gets-Wider-Experiement-Step-4.jpg 800w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Gets-Wider-Experiement-Step-4-300x158.jpg 300w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Gets-Wider-Experiement-Step-4-768x403.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\"><strong>Step 4 &#8211;<\/strong> Wait for about 30 seconds to allow the liquids&nbsp;to settle. You will notice three layers of liquid, first water at the bottom, then cooking oil in the middle and finally rubbing alcohol at the top.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"420\" src=\"https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Gets-Wider-Experiement-Step-5.jpg\" alt=\"Rule Gets Wider Experiment - Step 5\" class=\"wp-image-1134\" srcset=\"https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Gets-Wider-Experiement-Step-5.jpg 800w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Gets-Wider-Experiement-Step-5-600x315.jpg 600w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Gets-Wider-Experiement-Step-5-300x158.jpg 300w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Gets-Wider-Experiement-Step-5-768x403.jpg 768w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Gets-Wider-Experiement-Step-5-735x386.jpg 735w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\"><strong>Step 5 &#8211;<\/strong> As you observe the ruler in the glass, first notice that the ruler appears to get wider as soon as it enters the liquid within the glass cup. Immediately remove the ruler from the liquid to show that it really isn&#8217;t wider, it just appears to be when observed in the liquid.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Next, place the ruler back into the liquid and look very closely through the side of the cup. As you look closer, you will notice that the width of the ruler appears to change depending on the liquid it is in.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Do you know the why the ruler appears to change size? Find out the answer in the <a href=\"#Explanation\" target=\"_top\" rel=\"noopener noreferrer\">how does this experiment work<\/a> section below.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><a id=\"Video\"><\/a>Video Tutorial<\/h2>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/5EdM1X0wlSM?rel=0\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" data-mce-fragment=\"1\"><\/iframe><\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><a href=\"https:\/\/www.youtube.com\/watch?v=5EdM1X0wlSM\" target=\"_blank\" rel=\"noopener noreferrer\">Why does the Ruler Get Wider Experiment Video<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><a id=\"Explanation\"><\/a>How Does the Science Experiment Work<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">When the ruler is placed in the liquid it appears to get wider, but once we remove the ruler we see that it isn\u2019t really wider at all. This is because of refraction. <strong>Refraction<\/strong> is the bending of light as it passes from one medium into another (ie. air to water, water to air).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As light travels through a given medium, it travels in a straight line. However, when light passes from one medium into a second medium, the light bends. Light refracts (bends) as it passes from one medium to the next because it travels at different speeds through those mediums.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When we look at the portion of the ruler that is outside the glass of water, light from the ruler travels in a straight path to the eye. However, when we look at the ruler within the water, the light is refracted as it passes from the liquid into the air. This causes the ruler to look wider even though it truly isn\u2019t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Furthermore, the type of liquid impacts refraction. This is because different materials have different indexes of refraction. A material\u2019s <strong>index of refraction<\/strong> is a measure of how much light rays bends when they enter the material. Let\u2019s look at the index of refraction in terms of water and air. Objects in water appear larger than objects in the air. The index of refraction for air is 1.00. The index of refraction for water is 1.33. This larger index of refraction for water means that the angle the rays of light reach your eyes is larger in water than the angle would be in the air. This increase in the angle size of light to your eyes makes the object look larger in water than how it looks in the air. The ruler looks larger still in rubbing alcohol and especially in cooking oil because the index of refraction for rubbing alcohol is 1.36 and the index of refraction for cooking oil is 1.47.<\/p>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group product-spotlight\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading\" style=\"text-transform:capitalize\"><strong>Index of Refraction Science Lab Kit &#8211; Only $5<\/strong><\/h3>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns reverse-mobile is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<figure class=\"wp-block-image alignfull size-large\"><a href=\"https:\/\/coolscienceexperimentshq.com\/product\/index-of-refraction-science-lab-kit\/\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2023\/10\/Index-of-Refraction-Lab-Kit-Product-Image-1024x1024.png\" alt=\"\" class=\"wp-image-3664\" srcset=\"https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2023\/10\/Index-of-Refraction-Lab-Kit-Product-Image-1024x1024.png 1024w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2023\/10\/Index-of-Refraction-Lab-Kit-Product-Image-600x600.png 600w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2023\/10\/Index-of-Refraction-Lab-Kit-Product-Image-150x150.png 150w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2023\/10\/Index-of-Refraction-Lab-Kit-Product-Image-300x300.png 300w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2023\/10\/Index-of-Refraction-Lab-Kit-Product-Image-768x768.png 768w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2023\/10\/Index-of-Refraction-Lab-Kit-Product-Image-1536x1536.png 1536w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2023\/10\/Index-of-Refraction-Lab-Kit-Product-Image-2048x2048.png 2048w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2023\/10\/Index-of-Refraction-Lab-Kit-Product-Image-400x400.png 400w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2023\/10\/Index-of-Refraction-Lab-Kit-Product-Image-125x125.png 125w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2023\/10\/Index-of-Refraction-Lab-Kit-Product-Image-100x100.png 100w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<p class=\"wp-block-paragraph\">Use our easy <a href=\"https:\/\/coolscienceexperimentshq.com\/product\/index-of-refraction-science-lab-kit\/\">Index of Refraction Science Lab Kit<\/a><a href=\"https:\/\/coolscienceexperimentshq.com\/product\/balloon-rocket-science-lab-kit\/\"> <\/a>to grab your students\u2019 attention without the stress of planning!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It\u2019s everything you need to&nbsp;<strong>make science easy for teachers and fun for students<\/strong>&nbsp;\u2014 using inexpensive materials you probably already have in your storage closet!<\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-fe48e5de wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-50 has-custom-font-size has-normal-font-size\" style=\"text-transform:uppercase\"><a class=\"wp-block-button__link has-background wp-element-button\" href=\"https:\/\/coolscienceexperimentshq.com\/product\/index-of-refraction-science-lab-kit\/\" style=\"border-radius:0px;background-color:#f04a24\"><strong>Buy Now<\/strong><\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">More Experiments that Show Refraction<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/coolscienceexperimentshq.com\/can-water-bend-straw\/\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Light Refraction Science Experiment<\/strong><\/a> &#8211; Watch in amazement as the arrow to changes direction.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/coolscienceexperimentshq.com\/can-water-bend-straw\/\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Refraction of Light Science Experiment<\/strong><\/a> &#8211; Watch as the straw appears to bend in this experiment that shows refraction in action.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">I hope you enjoyed the experiment. Here are some printable instructions:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><script type=\"application\/ld+json\">{\"@context\":\"http:\\\/\\\/schema.org\",\"@type\":\"HowTo\",\"name\":\"Ruler Changes Size Science Experiment\",\"author\":{\"@type\":\"Person\",\"name\":\"Cool Science Experiments HQ\"},\"datePublished\":\"2023-06-11\",\"supply\":[\"Tall empty clear glass\",\"Water\",\"Cooking Oil\",\"Rubbing Alcohol\",\"Ruler\"],\"step\":[{\"@type\":\"HowToStep\",\"text\":\"Pour water into a tall clear glass. Fill it about 1\\\/3 of the way full.\",\"position\":1,\"name\":\"Pour water into a tall clear glass. Fill...\",\"url\":\"https:\\\/\\\/coolscienceexperimentshq.com\\\/ruler-changes-size\\\/#mv_create_59_1\"},{\"@type\":\"HowToStep\",\"text\":\"Next, carefully pour in cooking oil into the glass until the glass is a little less than 2\\\/3 of the way full.\",\"position\":2,\"name\":\"Next, carefully pour in cooking oil into the...\",\"url\":\"https:\\\/\\\/coolscienceexperimentshq.com\\\/ruler-changes-size\\\/#mv_create_59_2\"},{\"@type\":\"HowToStep\",\"text\":\"Slowly pour rubbing alcohol into the glass until the glass is almost full of liquid.\",\"position\":3,\"name\":\"Slowly pour rubbing alcohol into the glass until...\",\"url\":\"https:\\\/\\\/coolscienceexperimentshq.com\\\/ruler-changes-size\\\/#mv_create_59_3\"},{\"@type\":\"HowToStep\",\"text\":\"Wait for about 30 seconds to allow the liquids\\u00a0to settle. You will notice three layers of liquid, first water at the bottom, then cooking oil in the middle and finally rubbing alcohol at the top.\",\"position\":4,\"name\":\"Wait for about 30 seconds to allow the...\",\"url\":\"https:\\\/\\\/coolscienceexperimentshq.com\\\/ruler-changes-size\\\/#mv_create_59_4\"},{\"@type\":\"HowToStep\",\"text\":\"As you observe the ruler in the glass, first notice that the ruler appears to get wider as soon as it enters the liquid within the glass cup. Immediately remove the ruler from the liquid to show that it really isn\\u2019t wider, it just appears to be when observed in the liquid.\",\"position\":5,\"name\":\"As you observe the ruler in the glass,...\",\"url\":\"https:\\\/\\\/coolscienceexperimentshq.com\\\/ruler-changes-size\\\/#mv_create_59_5\"},{\"@type\":\"HowToStep\",\"text\":\"Next, place the ruler back into the liquid and look very closely through the side of the cup. As you look closer, you will notice that the width of the ruler appears to change depending on the liquid it is in.\",\"position\":6,\"name\":\"Next, place the ruler back into the liquid...\",\"url\":\"https:\\\/\\\/coolscienceexperimentshq.com\\\/ruler-changes-size\\\/#mv_create_59_6\"}],\"url\":\"https:\\\/\\\/coolscienceexperimentshq.com\\\/ruler-changes-size\\\/\"}<\/script>\t<section id=\"mv-creation-59\" class=\"mv-create-card mv-create-card-59 mv-diy-card mv-create-card-style-centered mv-no-js mv-create-center-cards mv-create-has-uppercase mv-create-has-image \" style=\"position: relative;\">\n\t\t\n\t\t<div class=\"mv-create-wrapper\">\n\n\t\t\t\n\t\t\t<header class=\"mv-create-header\">\n\t\t\t\t<h2 class=\"mv-create-title mv-create-title-primary\">Ruler Changes Size Science Experiment<\/h2>\n\t<form class=\"mv-create-print-form\" method=\"get\" target=\"_blank\" action=\"https:\/\/coolscienceexperimentshq.com\/wp-json\/mv-create\/v1\/creations\/59\/print\"><button class=\"mv-create-button mv-create-print-button\" data-mv-print=\"https:\/\/coolscienceexperimentshq.com\/wp-json\/mv-create\/v1\/creations\/59\/print\">Print<\/button><\/form>\n\t\t\t<\/header>\n\n\t\t\t<div class=\"mv-create-target mv-create-primary-unit\"><div class=\"mv_slot_target\" data-slot=\"recipe\" data-disable-chicory=\"1\"><\/div><\/div>\t<div class=\"mv-create-ingredients\">\n\t\t<h3 class=\"mv-create-ingredients-title mv-create-title-secondary\">Materials<\/h3>\n\n\t\t\t\t\t\t\t\t\t\t\t<ul>\n\t\t\t\t\t\t\t\t\t<li>\n\t\t\t\t\t\tTall empty clear glass\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t<li>\n\t\t\t\t\t\tWater\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t<li>\n\t\t\t\t\t\tCooking Oil\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t<li>\n\t\t\t\t\t\tRubbing Alcohol\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t<li>\n\t\t\t\t\t\tRuler\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t<\/ul>\n\t\t\t<\/div>\n\t\t<div class=\"mv-create-hands-free\"><\/div>\n\t\t<div class=\"mv-create-instructions mv-create-instructions-slot-v2\">\n\t\t<h3 class=\"mv-create-instructions-title mv-create-title-secondary\">Instructions<\/h3>\n\t\t<ol><li data-step-index=\"0\" id=\"mv_create_59_1\">Pour water into a tall clear glass. Fill it about 1\/3 of the way full.<\/li><li data-step-index=\"1\" id=\"mv_create_59_2\">Next, carefully pour in cooking oil into the glass until the glass is a little less than 2\/3 of the way full.<\/li><li data-step-index=\"2\" id=\"mv_create_59_3\">Slowly pour rubbing alcohol into the glass until the glass is almost full of liquid.<\/li><li data-step-index=\"3\" id=\"mv_create_59_4\">Wait for about 30 seconds to allow the liquids&nbsp;to settle. You will notice three layers of liquid, first water at the bottom, then cooking oil in the middle and finally rubbing alcohol at the top.<\/li><li data-step-index=\"4\" id=\"mv_create_59_5\">As you observe the ruler in the glass, first notice that the ruler appears to get wider as soon as it enters the liquid within the glass cup. Immediately remove the ruler from the liquid to show that it really isn&rsquo;t wider, it just appears to be when observed in the liquid.<\/li><li data-step-index=\"5\" id=\"mv_create_59_6\">Next, place the ruler back into the liquid and look very closely through the side of the cup. As you look closer, you will notice that the width of the ruler appears to change depending on the liquid it is in.<\/li><\/ol>\t<\/div>\n\n\t\t<\/div>\n\n\t\t<footer class=\"mv-create-footer\">\n\t\t\t\n<div class=\"mv-create-footer-flexbox\">\n\n\t\t\t<div class=\"mv-create-copy\">&copy; Cool Science Experiments HQ<\/div>\t\n\t<div class=\"mv-create-categories\">\n\n\t\t\n\t\t\n\t<\/div>\n\n\t\n<\/div>\n\t\t<\/footer>\n\n\t\t\n\t\t\t\t<div class=\"mv-create-checklists\" data-creation-id=\"59\"><\/div>\n\t\t\n\t<\/section>\n\n\t<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"1700\" src=\"https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Width-Change-Light-Refraction-Experiment-Steps.png\" alt=\"Rule Width Change Light Refraction Experiment Steps\" class=\"wp-image-1219\" srcset=\"https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Width-Change-Light-Refraction-Experiment-Steps.png 500w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Width-Change-Light-Refraction-Experiment-Steps-88x300.png 88w, https:\/\/coolscienceexperimentshq.com\/wp-content\/uploads\/2018\/02\/Rule-Width-Change-Light-Refraction-Experiment-Steps-301x1024.png 301w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/figure>\n<\/div>\n\n\n<div class=\"mv-video-target mv-video-id-ky3ybbg7fjhdffl389xq\" data-video-id=\"ky3ybbg7fjhdffl389xq\" data-volume=\"70\" data-ratio=\"16:9\">&nbsp;<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Would your eyes fool you? Don&#8217;t be too quick to blame them! But if it&#8217;s not our eyes, then why does the ruler look wider in this science experiment? Print our materials list and experiment instructions, preview our demonstration video, then learn how this experiment works with our easy to understand lesson on refraction. JUMP [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":1134,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[15],"tags":[],"class_list":{"0":"post-1019","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-science-experiments","8":"entry"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Index of Refraction - Ruler Changes Size Science Experiment<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/coolscienceexperimentshq.com\/ruler-changes-size\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Index of Refraction - Ruler Changes Size Science Experiment\" \/>\n<meta property=\"og:description\" content=\"Would your eyes fool you? Don&#8217;t be too quick to blame them! But if it&#8217;s not our eyes, then why does the ruler look wider in this science experiment? Print our materials list and experiment instructions, preview our demonstration video, then learn how this experiment works with our easy to understand lesson on refraction. 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