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Showing results 41 to 60 of 85
Hot Air
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In this activity, learners set up an experiment to investigate the effects of hot air on the path of a laser beam.
Spectroscope
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In this activity, learners construct their own spectroscope as they explore and observe spectra from familiar light sources.
Wandering Wands
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In this activity, learners construct wands that play different notes depending on information from light sensors programmed via a PICO Cricket.
Afterimage
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In this activity about vision and optical illusions, learners conduct a simple test to demonstrate how our eyes create "afterimages." Learners stare at a black cardboard bat for at least 30 seconds an
Fish Eyes: More than Meets the Eye
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In this data collection and analysis activity, learners evaluate fish physiology and ecology using vision research data from Dr.
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.
Disappearing Crystals
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Learners experiment with water gel crystals, or sodium polyacrylate crystals, which absorb hundreds of times their weight in water. When in pure water, the water gel crystals cannot be seen.
Reflections
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In this quick activity, Dracula has a hole in his house and learners help solve the problem by using a mirror and protractor to reflect incoming light out of his house.
Personal Pinhole Theater
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Have you ever heard of a camera without a lens? In this activity, learners create a pinhole camera out of simple materials. They'll see the world in a whole new way: upside down and backwards!
Circles or Ovals?
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This science activity demonstrates the dominant eye phenomena. What does your brain do when it sees two images that conflict?
Self-Portrait Silhouettes: Activity 1
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In this activity, learners make a photographic image--without a camera!
Bike Wheel Zoetrope
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In this activity (posted on April 18, 2011), learners follow the steps to construct a zoetrope, a device that produces an illusion of action from a rapid succession of static pictures, using a 16" bik
Stretch the Chain and See the Light
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In this activity, learners use their strength to light a light bulb. A chain made from paper clips is placed in series with a battery and flashlight bulb.
Sliding Gray Step
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How can you make one shade of gray look like two? By putting it against two different color backgrounds! This activity allows learners to perform this sleight of hand very easily.
It's all Done with Mirrors
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This fun and simple hands-on astronomy activity illustrates the path of light as it reflects off of mirrors and how this is used in telescopes.
Give and Take
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In this activity, learners explore liquid crystals, light and temperature. Using a postcard made of temperature-sensitive liquid crystal material, learners monitor temperature changes.
Telescopes as Time Machines
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This fun, nighttime hands-on astronomy activity lets learners explore how long it takes for light from different objects in the universe to reach Earth.
CD Spectrometer
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In this activity, learners use a compact disc to make a spectrometer, an instrument used to measure properties of light.
Pringles Pinhole Camera
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An ordinary camera has a lens that makes an image on film. In a pinhole camera, a small hole replaces the lens.
Light Maze
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In this activity, learners will explore light with reflective surfaces. Learners will make predictions and share their observations as they experiment with directing a beam of light.