1) Explain how a submarines sonar works and how bats here through echolocation. What makes these processes the same? What makes these processes different?

2) In gemstones there are 3 processes that describe the quality of the stone. These processes are referred to as scintillation, fire, and brilliance. Describe how each of these processes works in terms of reflections/refractions/refractive indexes. What would enhance/inhibit each of these processes? (You might want to draw some pictures)

3) Explain how noise canceling foam or paneling works. Why does it have the shape that it does? Does it matter what material it would be made out of?

4) How does lightning produce thunder and what cause the extended rumble? How would you expect this to be different if you were at 10k ft above sea level vs. at sea level?

5) Suppose you place your stereo speakers far apart and run past them from right to left or right to left. If you run rapidly enough and have excellent pitch discrimination, you may notice that the music playing seems to be out of tune when you're between the two speakers. Physics Final Exam

6) Explain why a mirror cannot give chromatic aberration.

7) During LASIK eye surgery the shape of the cornea is modified by vaporizing some of its material. If the surgery is performed to correct for nearsightedness, how does the cornea need to be reshaped?

8) Try this simple experiment on your own. Take two opaque cups, place a coin at the bottom of each cup near the edge, and fill one cup with water. Next, view the cups at some angle from the side so that the coin in water is just visible. Notice the coin in air is not visible. Explain this observation.