1. Working Backwards Task – Hidden Lens

2. A point source will be moved around for you in front of a lens
A point source will be moved around for you in front of a lens. The lens is hidden behind a screen.

3. Answer the following on your own

4. What type of lens is behind the screen?
Concave
Convex
Cannot be determined 1 2 3 4 5

5. Consult with your neighbors and then answer again

6. What type of lens is behind the screen?
Concave
Convex
Cannot be determined 1 2 3 4 5

7. A point source will be moved around for you in front of a lens
A point source will be moved around for you in front of a lens. The lens is hidden behind a screen.

8. Answer the following on your own

9. What type of lens is behind the screen?
Concave
Convex
Cannot be determined 1 2 3 4 5

10. Consult with your neighbors and then answer again

11. What type of lens is behind the screen?
Concave
Convex
Cannot be determined 1 2 3 4 5