{"id":1316,"date":"2004-03-04T21:10:00","date_gmt":"2004-03-05T03:10:00","guid":{"rendered":"http:\/\/pagefillers.com\/blog\/2004\/03\/04\/optical-illusions\/"},"modified":"2004-03-04T21:10:00","modified_gmt":"2004-03-05T03:10:00","slug":"optical-illusions","status":"publish","type":"post","link":"https:\/\/pagefillers.com\/blog\/2004\/03\/04\/optical-illusions\/","title":{"rendered":"Optical Illusions"},"content":{"rendered":"

We’re working on Light and Color in physics right now, so today I had fun showing the students various Optical Illusions. I started with how our brains can put individual images together to make “movies” in our heads. I have a cool toy that I bought at Disney during our New Years trip<\/a>. It has 8 LEDs that light up quickly and if you spin the toy, it spells out words in the sky. Well, I actually managed to take a picture of judiang<\/b><\/a> when she was spinning it, so I started the class with that picture. (Now all of my physics students know what Judi and hergrace<\/b><\/a> look like.) <\/p>\n

\"Magic
Cool Magic Floating Words!<\/div>\n

<\/lj-cut><\/p>\n

I then did a demonstration that I saw last night at the Dash & Dine session<\/a> where you wave a white stick in front of an out-of-focus projector and people see the entire image – sort of like how the toy works and how TVs and monitors work. They were suitably impressed.<\/p>\n

Then it was time for the PowerPoint presentation of Optical Illusions. I found a few websites with cool illusions. I used several from Optillusions<\/a> and many from Akiyoshi’s illusion pages<\/a>. But I think the one that they loved\/hated the most was the Checker Shadow Illusion<\/a>. Even when I showed them the two blocks were the same color using PaintShop Pro, they still didn’t want to believe. Heck, I didn’t want to believe it either! If you don’t believe it either, copy the image into your favorite drawing program and see for yourself.<\/p>\n","protected":false},"excerpt":{"rendered":"

We’re working on Light and Color in physics right now, so today I had fun showing the students various Optical Illusions. I started with how our brains can put individual images together to make “movies” in our heads. I have a cool toy that I bought at Disney during our New Years trip. It has […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1316","post","type-post","status-publish","format-standard","hentry","category-livejournal"],"_links":{"self":[{"href":"https:\/\/pagefillers.com\/blog\/wp-json\/wp\/v2\/posts\/1316","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pagefillers.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pagefillers.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pagefillers.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pagefillers.com\/blog\/wp-json\/wp\/v2\/comments?post=1316"}],"version-history":[{"count":0,"href":"https:\/\/pagefillers.com\/blog\/wp-json\/wp\/v2\/posts\/1316\/revisions"}],"wp:attachment":[{"href":"https:\/\/pagefillers.com\/blog\/wp-json\/wp\/v2\/media?parent=1316"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pagefillers.com\/blog\/wp-json\/wp\/v2\/categories?post=1316"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pagefillers.com\/blog\/wp-json\/wp\/v2\/tags?post=1316"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}