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In this optics activity, learners use paint thinner to make a small jar seem to disappear inside a larger jar.

This fun activity uses simple materials such as milk cartons and mirrors to introduce the ideas of optics and visual perception.

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.

In this activity, learners use gelatin as a lens to investigate the properties of laser light.