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Showing results 61 to 80 of 170
Pupil
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In this activity, learners explore their eye pupils and how they change.
Why are Compact Fluorescent Bulbs More Efficient?
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In this activity, learners explore the relative efficiency of different bulbs, specifically incandescent vs. fluorescent.
Rainbow in the Room
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This activity generates learner excitement about light through the creation of a room-sized rainbow.
Glow in the Dark
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Learners experiment to see which colors of light will cause a phosphorescent (glow-in-the-dark) material to glow.
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.
Total Internal Reflection
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In this activity, learners use a laser pointer, empty soda bottle, rubber plug and water to demonstrate total internal reflection.
Flashlight Play
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In this activity, young learners will explore light and darkness through flashlight play.
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.
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.
Mirrors and Images
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In this optics activity, learners explore how many objects they can see in a set of mirrors (hinged like a book) at various angles.
Dark Adaptation
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In this activity (6th on the page), learners investigate how photoreceptors in the eye (rods and cones) "adapt" to low light conditions.
Globe at Night
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In this international citizen science activity, learners measure their night sky brightness and submit their observations into an online database.
Liquid Crystals Interact with Light!
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In this two-part activity, learners explore the properties of liquid crystals, which are responsible for why mood rings change color.
Why Are Bubbles So Colorful?
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In this activity, learners explore why they can see colors in bubbles and why they change.
Optical Morpher
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In this amazing activity about light and reflection, learners will use a pie plate and reflective strips from a mylar balloon to try to morph their face into a friend's.
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.
Shadow Dance
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In this activity, learners experiment with shadows and light sources to understand the relationship between the angle illumination and the shadow's length.
Illuminations on Rates of Reactions
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In this activity, learners investigate the speed of chemical reactions with light sticks. Learners discover that reactions can be sped up or slowed down due to temperature changes.