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Showing results 21 to 34 of 34
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.
Mirrorly a Window
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In this activity about light and reflection, learners discover that what you see is often affected by what you expect to see.
Color Table: Color your perception
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Look at pictures through different color filters and you'll see them in a new way. People have used color filters in beautiful photography or sending secret messages.
Color Contrast
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Do you have a hard time matching paint swatches with your furniture? When you consider human perception, color is context dependent.
Shrinking Spot
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In this activity, learners control the (apparent) size of a hole with their brain.
What Causes Rainbows?
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In this activity, learners explore how and why rainbows form by creating rainbows in a variety of ways using simple materials. Learners create rainbows indoors and outdoors.
Soap-Film Painting
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Make a big canvas of iridescent color with pvc pipe! In this Exploratorium Science Snack, you'll need to cut and assemble some PVC pipe, but the pay-off, the soap-bubble canvas, is big.
Interference in a Ripple Tank
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In this optics activity, learners explore interference by adding wax blocks to a ripple tank.
See It to Believe It: Visual Discrimination
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In this activity (12th on the page), learners investigate their ability to discriminate (see) different colors.
Diffraction Between Wax Blocks
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In this optics activity, learners explore diffraction by adding wax blocks to a ripple tank. The wedge-shaped blocks act as obstacles that the wave must bend around.
Gray Step
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In this activity, learners discover that it's difficult to distinguish between two different shades of gray when they aren't separated by a boundary.
Rainbow Film
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In this activity, learners use clear nail polish to create a beautiful iridescent pattern on black paper. Learners discover that a thin film creates iridescent, rainbow colors.
Bring it into Focus
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In this activity (page 2 of PDF), learners play with a lens and a piece of paper to focus an image on the paper. Learners look at different things, and see how the lenses affect the image.
Luminol Test
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Learners mix a solution containing luminol and copper with a fake blood solution. A chemical reaction between the luminol solution and fake blood (hydrogen peroxide) show learners a blue glow.