Midterm2_spring2002

Midterm2_spring2002 - Physics 10 Midterm exam 2 April 26,...

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Physics 10 Midterm exam 2 April 26, 2002 Last name___________________ First name____________________SID___________ Essay questions : pick one and only one to answer. Write a page or two (or whatever is appropriate) in your blue book or on the back of this handout. The essay is worth 20 points. The essay should be clear, organized, and well-written. 1. In some science classes they teach that light travels in straight lines. But this is not always true. Why it is widely believed that light behaves this way? Give example that show the situations in which it is not true. Use numbers whenever possible. 2. Waves have a peculiar property: they can cancel. Give examples of cancellation for sound, light, water, and earthquakes. Explain why cancellation is so difficult to observe for light. 3. Most people have never heard of a "sound channel". Given two examples of sound channels. Describe how the velocity of sound varies with location, and how this affects the direction of the waves. Give examples of the practical use of these channels. Brief questions
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Midterm2_spring2002 - Physics 10 Midterm exam 2 April 26,...

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