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Physical Chemistry Exam Review 191

Physical Chemistry Exam Review 191 - Since the level of...

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Physical Science Activities Manual ________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________ Center of Excellence for Science and Mathematics Education at The University of Martin object on the left side are seen on the right. Finally, you can see how others see you. Do you like this view any better than what you have been looking at all these years?? E. Refraction 1. Tape a penny to the inside bottom of an opaque cup (try a Styrofoam ® coffee cup) and place it on the table. 2. Move your head down so that the penny just disappears behind the rim of the cup. Hold your head steady so that the penny is still hidden to your eye. 3. Have another student pour water into the cup. What happens? [The penny magically reappears and appears to be floating half-way up from the bottom..] 4. Look at the diagram showing the ray coming from the far edge of the penny.
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Unformatted text preview: Since the level of your eye was low enough the edge of the cup blocked it from reaching your eye and you can't see the penny. 5. In the second diagram after the water has been added, notice that the eye is in the same location but this time the light ray coming from the far edge of the penny has been bent (refracted) as it passed from the water to the air and on to your eye. The object appears to be located half-way up from the bottom. 6. This is a common phenomenon when light travels from one medium to another medium. This is because the speed of light is different in different media. It was moving slower through the water and faster through the air. It would move fastest in a vacuum. 7. The normal line AB has been drawn in perpendicular to the interface of the water and air. The light bends away from the normal when it speeds up. Notice how angle XOB is smaller than AOY....
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