Search Results

In this activity, learners create a simple “top” from a CD, marble and bottle cap, and use it as a spinning platform for a variety of illusion-generating patterns.

In this activity, learners investigate color vision as well as plan and conduct their own experiments.

In this activity, learners conduct a simple test to find their blind spot.

In this activity, learners discuss and investigate how cameras, telescopes, and their own eyes use light in similar ways.

In this quick optics activity, learners use a dim point of light (a disassembled Mini MagLite and dowel set-up) to cast a shadow of the blood supply in their retina onto the retina itself.

In this activity, learners examine how colored lenses act like filters and absorb all colors of light except for the color of the lenses.

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.

In this activity, learners investigate visual perception as well as plan and conduct their own experiments.

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.

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.

In this activity about afterimages, learners explore what happens when receptor cells called cones in your eye's retina get tired.

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.

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'

In this activity, learners will create an optical illusion top. Learners will explore color mixing, physics and design through this activity.

In this activity (13th on the page), learners complete a simple illusion trick to see through their own hand.

In this activity, learners make a Benham Top to explore visual illusions and optics.

In this exercise (Activity #2 on page), learners test their distance vision to evaluate their overall eyesight.

This activity (on page 2 of the PDF under SciGirls Activity: Colorblind Dogs) is a full inquiry investigation into dogs' ability (or inability) to see color.

In this activity (3rd on the page), learners conduct a series of tests to find out which of their eyes is more dominant.

In this lab (Activity #1 on page), learners explore how we see color.