{"id":21848,"date":"2019-07-22T19:32:58","date_gmt":"2019-07-22T23:32:58","guid":{"rendered":"https:\/\/www.myedme.com\/login\/?p=21848"},"modified":"2019-07-31T10:04:49","modified_gmt":"2019-07-31T14:04:49","slug":"chapter-12-cool-tech-smartphones","status":"publish","type":"post","link":"https:\/\/myedme.com\/login\/chapter-12-cool-tech-smartphones\/","title":{"rendered":"Chapter 12. The Incredible (Invisible) Nature of Light"},"content":{"rendered":"\n

If you want to look at the questions now, you can\u00a0click here<\/a>.<\/p>\n\n\n\n

Our eyes can see many of these waves,\nbut not all! For example, the shortest waves that we can see are purple light.\nThe purple color with the shortest wave is violet. Waves that are a little bit\nshorter create \u201cultra-violet\u201d waves. These waves are too close together for our\neyes to see. The Sun creates radiant energy, which includes ultra-violet waves,\nand many other invisible waves. Have you ever been sunburned? You can blame the\nultra-violet light waves! <\/p>\n\n\n\n

Waves shorter than ultra-violet waves\ncan fit into small places. That is why they are used for X-rays. They are also\ncreated by nuclear power plants. Nuclear power plants use reactions between the\nsmallest particles of matter to create a HUGE amount of energy. Because these\nparticles are so small, their electromagnetic waves are even smaller than\nX-rays. <\/p>\n\n\n\n

\"\"
Heat creates infrared waves!<\/em><\/strong> This picture shows how cameras that read infrared waves show information about where heat comes from. The higher the infrared reading, the more heat generated. You can see that this dog\u2019s mouth and eyes release the most heat.<\/em> <\/figcaption><\/figure><\/div>\n\n\n\n

Red is the\nvisible light wave with the longest waves. Waves that are a little bit longer\nare called infrared waves. Your remote control uses infrared waves to\ncommunicate with your TV. Scientists found that heat sources send out infrared\nwaves, too. Guess what? You are a heat source, and you send out infrared waves!\nBy measuring infrared waves, we can know how hot something is. <\/p>\n\n\n\n

Waves\nlonger than infrared waves are useful for running cell phones, radios, and\nsatellites. <\/p>\n\n\n\n

Waves shorter than ultra-violet waves are useful for investigating small things. Each wavelength has its own special uses!<\/p>\n\n\n\n

But, how fast are these waves? <\/strong>
You know that the speed of light is super fast. It\u2019s actually 670,616,629 miles per hour! All electromagnetic waves travel at the same speed. Remember, light is an electromagnetic wave. All electromagnetic waves travel at the speed of light! So, a radio tower and an X-ray machine create waves that travel at 670,616,629 miles per hour! <\/p><\/blockquote><\/figure>\n","protected":false},"excerpt":{"rendered":"

If you want to look at the questions now, you can\u00a0click here. Our eyes can see many of these waves, but not all! For example, the shortest waves that we can see are purple light. The purple color with the shortest wave is violet. Waves that are a little bit shorter create \u201cultra-violet\u201d waves. These […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-21848","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/myedme.com\/login\/wp-json\/wp\/v2\/posts\/21848","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/myedme.com\/login\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/myedme.com\/login\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/myedme.com\/login\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/myedme.com\/login\/wp-json\/wp\/v2\/comments?post=21848"}],"version-history":[{"count":2,"href":"https:\/\/myedme.com\/login\/wp-json\/wp\/v2\/posts\/21848\/revisions"}],"predecessor-version":[{"id":22824,"href":"https:\/\/myedme.com\/login\/wp-json\/wp\/v2\/posts\/21848\/revisions\/22824"}],"wp:attachment":[{"href":"https:\/\/myedme.com\/login\/wp-json\/wp\/v2\/media?parent=21848"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/myedme.com\/login\/wp-json\/wp\/v2\/categories?post=21848"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/myedme.com\/login\/wp-json\/wp\/v2\/tags?post=21848"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}