optical_illusions1

optical_illusions1 - Optical Illusions Types of Illusions...

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Unformatted text preview: Optical Illusions Types of Illusions Distortions due to strange physical conditions mirages, rainbows Strange projection effects 3D, holograms Quirks of human physiology Color perception, wiggling lines Refraction Light slows down going through a medium Speed depends on properties of medium Waves bend at a surface From Wikipedia: Huygens-Fresnel principle QuickTime and a decompressor are needed to see this picture. Faster (fewer interactions) Slower (more interactions) Hot air is less dense QuickTime and a decompressor are needed to see this picture. Less dense means fewer interactions with light => Light moves faster Highway/ desert mirage Looks like water reflecting things in the background QuickTime and a decompressor are needed to see this picture. QuickTime and a decompressor are needed to see this picture. Or the surface air can be denser Bending happens the other way Stuff from below the horizon gets pulled up where you can see it QuickTime and a decompressor are needed to see this picture. Or the surface air can be denser Bending happens the other way Stuff from below the horizon gets pulled up where you can see it QuickTime and a decompressor are needed to see this picture. Or the air can have water droplets in it Light refracts when it enters water droplet It reflects off back wall Light refracts when it comes out QuickTime and a decompressor are needed to see this picture. Rainbows Need sun behind you Light is refracted, reflected, refracted back at you Different refraction properties disperse colors QuickTime and a decompressor are needed to see this picture. Secondary rainbows Extra bounce means that colors get reflected: red is on bottom, blue on top QuickTime and a decompressor are needed to see this picture....
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This note was uploaded on 03/13/2010 for the course PHYS 181 taught by Professor Gilholder during the Spring '10 term at McGill.

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optical_illusions1 - Optical Illusions Types of Illusions...

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