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Oil Spot Photometer
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In this math activity related to light, learners assemble a photometer and use it to estimate the power output of the Sun.
Convection Current
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In this activity, learners make their own heat waves in an aquarium.
Moiré Patterns
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In this activity about light and perception, learners create and observe moire patterns.
Colored Shadows
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In this optics activity, learners discover that not all shadows are black. Learners explore human color perception by using colored lights to make additive color mixtures.
Phantom Phlame
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In this trick, hold your hand over a burning candle without getting burned, by reflecting and transmitting the light of two candles. This activity is best suited as a demonstration.
Soap Bubble Shapes
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Learners explore three-dimensional geometric frames including cubes and tetrahedrons, as they create bubble wands with pipe cleaners and drinking straws.
Pupil
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In this activity, learners explore their eye pupils and how they change.
Magic Wand
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In this activity about light and perception, learners create pictures in thin air.
Hot Spot
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In this activity, learners explore the invisible infrared radiation from an electric heater.
Corner Reflector
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In this optics/mathematics activity, learners use two hinged mirrors to create a kaleidoscope that shows multiple images of an object.
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.
Polarized Sunglasses
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In this activity, learners explore how polarizing sunglasses can help diminish road glare.
Seeing Your Blind Spot
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This activity (aka "snack") provides instructions for discovering your blind spot. It is an exploration of light and visual perception using simple materials you may have around the house.
Diffraction
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In this optics activity, demonstrate diffraction using a candle or a small bright flashlight bulb and a slide made with two pencils.
Touch the Spring (Lightbulb)
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In this activity, a lightbulb is placed in front of a concave mirror. The actual lightbulb is not visible to the viewer, but the viewer can see the mirror image of the lightbulb formed in space.
Glow Up
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In this activity, learners explore chemiluminescence and fluorescence. Learners examine 3 different solutions in regular light, in the dark with added bleach solution, and under a black light.
Giant Lens
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In this activity about light and refraction, learners discover how a lens creates an image that hangs in midair.
Bone Stress
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In this optics activity, learners examine how polarized light can reveal stress patterns in clear plastic.
Lagging Sound
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In this group activity, learners see and hear the speed of sound. A learner designated the "gonger" hits a gong, once every second, as the rest of the group watches and listens from a distance.
Film Canister Farming
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In this hands-on botany activity, learners sprout vegetables in film canisters.