Lenses

Refraction

Fresnel Lenses-Giant Lens, Snackbook

Concave/ Convex- We start out by having the students make observations with each type of lens. Hold the lens close to the eye and far away.

Shrinking Money Bank-Bought this at a finer toy store-the lens causes the coins to appear to shrink.

Spot in a Cup-With an indelible pen, draw a spot, about the size of a quarter, on the inside bottom of a white plastic drinking cup. Have students stand so that they see the inside corner of the cup, but are unable to see the dot. Have a partner pour water into the cup. The dot should become visible as the water nears the top of the cup.

Disappearing Glass Rod- Snackbook