1. Lenses

2. What is a lens?
Curved piece of glass or other transparent material that is used to refract light

3. What does the image depend on?
The size and shape of the lens

4. What is a concave lens?
A lens that is thinner in the middle
It CAVES in…

5. Picture time!
Focal Point
Image appears smaller but right side up

6. Picture time!

7. Picture time!

8. Picture time!

9. Animation time!

10. What happens to the rays of light?
They spread out from a (VIRTUAL) focal point on the same side of the lens as the source
Image appears smaller

11. What is a convex lens?
A lens that is thicken in the center than at the edges
VEX – EXit out…it curves out…

12. Picture time! Focal Point
Image appear upside down, larger or smaller depending on the distance from the focal point

13. Picture time!

14. Picture time!

15. Picture time!

16. Picture time!

17. Animation time!

18. What happens to the rays of light?
They focus to a point, then invert the image.

19. Let’s Venn again!!!