1. Images Formed by Lenses
Converging

2. How Do We See the World?
Through a lens!!!

3. Converging & Diverging Lenses

4. Converging Lens Terminology
F’ on same side as incident rays
Two refractions occur
Ray emerging from lens is called the EMERGENT RAY

5. Converging Lenses: Incident Rays & Emergent Rays
Three Key Rays:
1. Incident light rays parallel to the PA
refract through the principal focus (F)

6. Converging Lenses: Incident Rays & Emergent Rays
Three Key Rays:
2. Incident light rays going through F’
refract parallel to the PA.

7. Converging Lenses: Incident Rays & Emergent Rays
Three Key Rays:
3. Light rays that go in through O
continues straight through; doesn’t refract

8. Converging Lenses: Finding Images
Object beyond 2F’ F’
2F’ F 2F
image
Refracted emergent
Image forms where ____________________ rays cross

9. Putting it all Together
Lens Simulation

10. Converging Lenses Finding Images - Practice
Draw Ray Diagrams with the object at…
2F’
Between F’ and 2F’
At F’
In front of F’