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Showing results 1 to 11 of 11
CD Spinner
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In this activity, learners create a simple “top” from a CD, marble and bottle cap, and use it as a spinning platform for a variety of illusion-generating patterns.
Seeing Your Retina
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In this quick optics activity, learners use a dim point of light (a disassembled Mini MagLite and dowel set-up) to cast a shadow of the blood supply in their retina onto the retina itself.
Bird in the Cage
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In this activity about afterimages, learners explore what happens when receptor cells called cones in your eye's retina get tired.
How Our Environment Affects Color Vision
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In this lab (Activity #1 on page), learners explore how we see color.
Spinning Illusions
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In this activity, learners construct three optical illusion toys to examine how our brains play tricks on what we see.
Moiré Patterns
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In this activity about light and perception, learners create and observe moire patterns.
Benham's Disk
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In this activity, learners make a Benham Top to explore visual illusions and optics.
Seeing in the Dark
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In this activity (17th on the page), learners investigate why you cannot see colors in dim light.
Thaumatrope
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In this activity, learners make an optical illusion toy from the 1800s to explore persistence of vision.
Blue Sky
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In this optics activity, learners explore why the sky is blue and the sunset is red, using a simple setup comprising a transparent plastic box, water, and powdered milk.
Benham's Disk
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In this optics activity, learners discover that when they rotate a special black and white pattern called a Benham's Disk, it produces the illusion of colored rings.