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Liquid Lens
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In this activity, learners discover that they can create a lens from a water drop. Learners test their lens by looking at words or pictures.
Bending Light
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In this optics activity, learners make a lens and explore how the eye manipulates the light that enters it.
Bring it into Focus
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In this activity (page 2 of PDF), learners play with a lens and a piece of paper to focus an image on the paper. Learners look at different things, and see how the lenses affect the image.