Followups from Sep 2.

1. Newton's rings were first described by Robert Hooke in Micrographia (observation 9)
2. Ants marching follow Fermat's Least time principle. Oettler J, Schmid VS, Zankl N, Rey O, Dress A, et al. (2013) Fermat’s Principle of Least Time Predicts Refraction of Ant Trails at Substrate Borders. PLOS ONE 8(3): e59739. https://doi.org/10.1371/journal.pone.0059739
3. Index of Refraction vs Wavelength is described by the Sellmeier equation.

We saw the double and single slit demonstrations on 9/2. These are convincing evidence for the wave nature of light.

To Do:

1. Make sure you are happy with basics of wave motion, from University Physics II. If you need to review it, please do so.
2. Read Chapters 3 and 4 here: OpenStax, U. Physics III, Ch 3., OpenStax, U. Physics III, Ch 4.
3. Be prepared to present responses to the following (preferably without relying on notes - ask the class for help instead of copying from a paper):
   
   

   Lingering Issues

   1. Use plotting software to create a plot of the index of refraction vs Wavelength of a transparent medium of your choice. Look up the Sellmeier equation and the relevant numbers. Here is an example of the index of refraction for common BK7 Glass. Choose your own medium (besides BK7) and make a plot like this (i.e. $n(\lambda)$). Please submit a single page pdf with your plot and references to Brightspace an hour before class and be ready to talk about your result.

   

   General Questions

   2. What is Huygen's Principle?

   3. Why don't we see interference related effects when we shine two flashlights at the wall?

   4. Draw the double slit set up on the board (fig 3.7).

   5. Describe the operating principles of the Michelson Interferometer.

   Problems (OpenStax U.Phys.III)

   6. 3.5
   7. 3.19
   8. 3.52
   9. 3.94

---