Students observe refraction of liquids. Students compare reflection and refraction. Students study reflection in 2 mirrors. Students study reflection in 1 mirror. Graphing 30 Lenses and their Uses 1.
Students determine the focal length of a convex lens.
Students calculate the magnification of a lens. Students make a refractor telescope. Making a telescope 1. 31 Sound 1. Students make string telephones with various materials, and compare them.