Pffp HW Week 9 - P ffp HW Week 9 1. What makes people...

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Pffp HW Week 9 1. What makes people nearsighted? How does surgery help to remedy this situation? Nearsightedness occurs either when an individual’s cornea is too curved or if his or her retina is located too far back in the eye. When the cornea is too curved, light at the edges is bent too much and ultimately “overshoots” the target area of the retina causing blurry vision of distant objects. Surgery can be used to reshape the cornea so that it is not as curved. 2. How are a fiber optic cable and a sound channel similar? How do they work? Fiber optics and the sound channel both work by “trapping” light or sound waves. In both cases, a channel of slower light or sound waves is surrounded by faster waves. This way, as light or sound deviates from the fiber optic cable or sound channel, it is focused back by the faster waves into the channel of slow waves. 3. Why is an earthquake L-wave more dangerous than the S or P waves? L waves are the last to arrive and travel only on the surface of the Earth. Because they
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This note was uploaded on 10/04/2011 for the course PHYSICS 10 taught by Professor Miller during the Spring '08 term at University of California, Berkeley.

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Pffp HW Week 9 - P ffp HW Week 9 1. What makes people...

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