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Bone Stress
Source Institutions
In this optics activity, learners examine how polarized light can reveal stress patterns in clear plastic.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-796.gif?itok=DlG_NXpo)
Springs and Stomachs
Source Institutions
In this demonstration, learners investigate mass, gravity, and acceleration by dropping a wooden bar with a balloon attached to its underside, a mass suspended from it by rubber bands, and a sharp-poi
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Laser Jello
Source Institutions
In this activity, learners use gelatin as a lens to investigate the properties of laser light.
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Colored Shadows
Source Institutions
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.