1. Lenses

2. What is a Lens?
A transparent object, usually made of glass, that uses refraction to bend light
Used in glasses, hand lenses, cameras, telescopes, binoculars, microscopes

3. Convex Lenses A lens with at least one surface that curves outward
Light goes to one point called the “focal point”
Farsighted people use convex lenses

4. Concave Lenses A lens with at least one surface that curves inward
Light spreads out from the lens
Nearsighted people use concave lenses

5. What type of lens is this?

6. What type of lens is this?
Concave because the light is spreading out from the lens.

7. What type of lens is this?

8. What type of lens is this?
Convex because the light is going towards one point.