1. 26 Interference & Diffraction -- Physical/Wave Optics Thin film interference

2. Interference & Coherent Sources

3. Superposition & Interference Superposition: The net response at a given place and time caused by two or more stimuli is the sum of the responses which would have been caused by each stimulus individually (wikipedia) Key factor: phase.

4. Double Slits Interference-1 Fringes

5. Double Slits Interference-2 Mirror Equation

6. Example: Determining

7. Interference in Thin Film Note: when n b > n a, reflected wave undergoes an additional half cycle (i.e., /2) phase shift.

8. Example: Interference Fringes (note: additional /2 phase shift from the bottom reflection)

9. Newton Rings & Applications

10. Non-reflective & Reflective Coatings

11. Diffraction & Geometric Optics

12. Diffraction—Reality Fresnel diffraction: near-field diffraction Fraunhofer diffraction: far-field diffraction

13. Single Slit Diffraction

14. Fresnel & Fraunhofer: Single Slit Huygens’s Principle: Every point of a wave front may be considered the source of secondary wavelets that spread out in all directions with a speed equal to the speed of propagation of the waves.

15. Dark Fringes R

16. Multiple Slits & Diffraction Gratings Constructive interference or bright fringes occur: Destructive interference or dark fringes occur:

17. X-Ray Diffraction

18. Circular Apertures & Resolving Power First Dark Ring occurs

19. Resolving Power Rayleigh’s Criterion (  increase D or reduce could improve the resolution)

20. Holography

21. Summary: Superposition, interference, & Coherent Sources

22. Summary: Double Slits Interference

23. Summary: Thin Film Interference

24. Summary: Diffraction & Gratings

25. Summary: X-Ray Diffraction

26. Summary: Circular Apertures & Resolving Power

27. Summary: Holography

28. Ch 26 Homework Answers to multiple choice problems Problems: 1, 6, 11, 15, 25, 27, 47