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Showing results 21 to 37 of 37
Benham's Disk
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In this activity, learners make a Benham Top to explore visual illusions and optics.
Depth Perception
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In this easy demonstration (3rd on the page), learners explore depth perception by conducting a test with two pencils.
Drop IT!: Depth Perception
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These two activities (4th on the page) demonstrate the importance of two eyes in judging depth.
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.
Accommodating Accommodation
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In this demonstration (18th on the page), learners conduct a simple test to explore how the cornea refracts light, which is further bent by the eye lens through a process known as accommodation.
Shifting Backgrounds, Shifting Images
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In this quick activity/demonstration (5th on the page), learners explore depth perception.
Thaumatrope
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In this activity, learners make an optical illusion toy from the 1800s to explore persistence of vision.
Stroboscope
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In this activity (posted on March 20, 2011), learners follow the steps to construct a stroboscope, a device that exploits the persistence of vision to make moving objects appear slow or stationary.
Pinhole Magnifier
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In this activity related to light and perception, learners use a pinhole in an index card as a magnifying glass to help their eye focus on a nearby object.
Thaumatropes
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In this activity, learners will make a thaumatrope, an old-fashioned optical illusion that dates back to the 1820s.
Disappearing Act
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Make a camouflage cut-out animal! Using patterned paper or magazine pictures from around the house, use your craft skills to make a paper animal that blends into its background.
Spinning Cylinder: Make a triangle appear on a spinning wheel
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Spin a short piece of PVC pipe that's been marked up, and watch a triangle appear. Enjoy this optical illusion from the Exploratorium's Science Snack series.
Whirling Watcher: Make a Stroboscope
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In this activity, learners make a stroboscope--a spinning disk with slits around the edge that you look through.
Seeing Is Believing
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This activity is designed to accompany the PBS documentary about African-American chemist "Percy Julian: Forgotten Genius." Learners look through two cups with small holes in them to simulate what it'
Mix-N-Match Light
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This is an online exhibit about color perception. Learners set a random background color and then try to mix red, blue, and green light to match.
Periscope
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In this optics activity, learners build a spy tool to secretly view things over walls or around corners.
Measure Your Ability to See
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In this exercise (Activity #2 on page), learners test their distance vision to evaluate their overall eyesight.