P329 Homework Set 1

P329 Homework Set 1 - P329 Homework Set #1 Bari Singer 1....

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P329 Homework Set #1 Bari Singer 1. 2. (a) When you go swimming under water and you open your eyes, things appear really blurry. This happens for one main reason-Refraction. We see differently when we open our eyes under water because of the way water refracts light. Photons travel in straight lines unless they are reflected, absorbed or refracted. In this case we are dealing with light that is refracted. When light passes from one medium to another it changes direction. And in order for us to see things clearly we have to focus light into our retinas. However, this comes with the assumption we are looking at light through air only. When we are under water, the shape and index of our lenses in our eyes stays the same but the medium outside of your eye is now different. (Water instead of air). Refraction has occurred because light has passed from air into water and into the eyeball. This decreases the amount of refraction that occurs thus making images blurry. (b) If you put goggles on before you go under water, you can see as you normally would above the water, this is because when you wear goggles the medium directly in front of your eyes is air-the medium your eyes expect. People, also, often do not notice that the front of your goggles is flat. Usually
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P329 Homework Set 1 - P329 Homework Set #1 Bari Singer 1....

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