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26 Interference & Diffraction -- Physical/Wave Optics

26 Interference & Diffraction -- Physical/Wave Optics. Thin film interference. Interference & Coherent Sources. Superposition & Interference.

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26 Interference & Diffraction -- Physical/Wave Optics

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  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 l

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

  8. Example: Interference Fringes (note: additional l/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 l 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

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