Warm-Up Exercise 32

Due 12:15 pm, Fri 9 Nov 2012

Physics 123, Fall 2012

Reading assignment: 37.1-37.3

          

The figure on the left is from your textbook. The figure on the right is from the Wikipedia article on Young's double slit experiment, and more closely corresponds to what Young actually did. What is the purpose of S1 in the right figure? (This is subtle, but give it your best guess.)

Consider a two-slit interference pattern like those above. What do you suppose would happen if the entire setup were immersed in water?