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In this optics activity, learners experiment with polarizers (small dark rectangles) to examine light intensity.

This is an online exhibit about color perception. Learners set a random background color and then try to mix red, blue, and green light to match.

In this online activity, learners make a whole rainbow by mixing red, green, and blue light. They can change the wavelength of a monochromatic beam or they can filter white light.

In this activity, learners overlap the three primary colors to see how all other colors are made.

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 quick activity, Dracula has a hole in his house and learners help solve the problem by using a mirror and protractor to reflect incoming light out of his house.

In this activity, learners explore their eye pupils and how they change.

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.

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

In this demonstration (18th on the page), learners conduct a simple test to explore how the cornea refracts light, which is further bent by the eye lens through a process known as accommodation.

Use this hands-on activity to demonstrate infrared and thermal radiation.