1. Lecture 22 Interference Homework due Wed…

2. Interference

3. Recall

4. Young’s double slit Interference Where are the fringes located?

5. Double slit demo What is the slit spacing?

6. Diffracted intensity

7. Newton’s Rings

8. Thin Film interference Soap film interference Where does the interference come from?

9. Anti-Reflection coatings First we want R 1 =R 2 D=(2m+1)n 2  /2

10. Thin film transmission

11. Fabry-Perot interferometer r=0.25 r=0.5 r=0.75 r=0.95

12. Coefficient of Finesse Airy Function

13. Finesse 22  1/2

14. Free Spectral Range