The document discusses the phenomenon of diffraction, which is the bending of waves around barriers. Specifically, it states that (1) diffraction effects are greater for long wavelength waves and small holes, and (2) the double slit experiment demonstrates the principles of constructive and destructive interference patterns from wave diffraction. Sample problems are also provided to calculate diffraction fringe spacing and wavelength using the double slit experiment.

1. Diffraction
The bending of
waves around the
edges of barriers

3. Diffraction
(a) the diffraction effects are greater for long
wavelength waves
(b) the diffraction effects are greater for small
holes

4. Young's Double Slit
Experiment

5. Double Slit
Experiment

6. Double Slit
Experiment

7. Double Slit
Experiment

8. Double Slit
Experiment
Constructive Interference (Bright, maxima):
d sin θ = mλ
Destructive Interference (Dark, minima): d sin θ = (m + ½)λ

9. Sample Problem #1
Monochromatic light falling on two
slits 0.016 mm apart from each other
produces a 5th order fringe at an
angle of 8.8 degrees. What is the
wavelength of the light used?

10. Sample Problem #2
A screen containing two slits 0.100 mm
apart is 1.2 m from the screen. Light
with a wavelength of 500 nm falls on
the slits from a distant source.
Approximately how far apart are the
adjacent bright interference fringes on
the screen?

11. Sample Problem #2

12. Intensity

14. Dispersion

16. Polarization

18. Critical Angle

21. Mirrors
Mirrors
- f is + for concave, - for convex
- do and di are + for real objects &
images
- do and di are - for virtual objects &
images
- m is + for upright images, - for
inverted images

22. Lenses
Lenses
- f is + for converging, - for diverging
- do and di are + for real objects &
images
- do and di are - for virtual objects &
images
- m is + for upright images, - for
inverted images