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1. Single Slit Diffraction Parallel rays can go straight through the slit
Use Huygens wavelets and consider rays that pass at an angle. Interference occurs!
2. Single Slit Diffraction Keep looking for combinations that are either half a wavelength or a full wavelength apart
3. Single Slit Interference
4. Diffraction Grating Many slits close together gives maxima that are sharper and thinner
5. Diffraction Grating
7. Thin Films
8. Newton’s Rings
9. Newton’s Rings
10. Non-Glare Lenses
12. Polarization Refers to the orientation of the electric field vector.
For normal light sources, the field direction is random since we have a multitude of individual atoms involved in the creation of the light
Any atom’s light emission depends on the atom’s orientation and that is random
13. Polarization Some materials have a unique property of only transmitting light with a particular orientation of the electric field vector
These materials are called polarizers
17. Polarization Resolve any arbitrary electric field vector into components parallel and perpendicular to the direction of polarization of the material.
18. Polarization Split the unpolarized light into parallel and perpendicular components
Only the parallel is transmitted (half the original)
20. Polarization Light gets dimmer with each pass
21. Polarization Light reflecting from non-metallic surfaces tends to get polarized in the plane parallel to the surface
Polaroid sunglass block rays that are horizontally polarized, and thus reduce glare from light reflected from the pavement
22. Brewster Angle