Ideal for introducing students to the concepts of reflection and refraction. The movable arm carrying the laser light source is parallel to the protractor disk, allowing students to carefully measure the reflection and refraction angles, internal reflection, and refraction index. Circular water tank measure 4-3/4" dia. The protractor disk and laser light attachment can be removed from the water tank and can be used for separate experiments. Equipped with two mirrors that combine plane, concave and convex, semi-circular, bi-convex, and plano-concave lenses.
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