This assignment is due before 9 AM, Friday, December 15^th, 2000.

• Puzzle solutions are due by 9:00 AM on Friday of each week.
• Puzzles are worth 5 points of extra credit each.
• Answers must be accompanied by valid reasoning. Just like the tests, the answer alone isn't enough!
• Each week, the first student to submit a correct answer will recieve the stylish 251 T-shirt.
• Previous winners get a "virtual t-shirt." No shirt, but a chance to win a prize with actual value at the end of the semester (often a book, or maybe software).
• Please enter your solution in the text area at the bottom of this page. DON'T FORGET TO GIVE YOUR NAME!

A person with good vision finds that she cannot focus on anything underwater. However, plastic goggles with "lenses" that are flat plastic disks allow her to see the fish clearly. Please explain how this can be.

Don't forget to explain your answer as clearly as possible.

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