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In this simple activity, learners investigate refraction by placing a picture of an arrow behind a glass of water.

In this activity, learners create a water prism to break light into the seven colors of the rainbow.

In this optics activity, learners use glass and water to demonstrate total internal reflection (TIR).

In this activity, learners use a laser pointer, empty soda bottle, rubber plug and water to demonstrate total internal reflection.

In this data collection and analysis activity, learners evaluate fish physiology and ecology using vision research data from Dr.