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In this activity about light and refraction, learners make a lens and magnifying glass by filling a bowl with water.

In this activity, learners explore the invisible infrared radiation from an electric heater.

In this optics activity, learners make a simple telescope using two lenses and a cardboard tube. Learners construct the telescope and then calculate its magnification.

In this activity about light and refraction, learners discover how a lens creates an image that hangs in midair.