12.07.2015 Views

Simple Nature - Light and Matter

Simple Nature - Light and Matter

Simple Nature - Light and Matter

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5. Now position yourself with your head under a light fixture <strong>and</strong> directly over a shiny surface,such as a glossy tabletop. You’ll see the lamp’s reflection, <strong>and</strong> the light coming from the lampto your eye will have undergone a reflection through roughly a 180-degree angle (i.e., it verynearly reversed its direction). Observe this reflection through the polaroid, <strong>and</strong> try rotating it.Finally, position yourself so that you are seeing glancing reflections, <strong>and</strong> try the same thing.Summarize what happens to light with properties X <strong>and</strong> Y when it is reflected. (This is theprinciple behind polarizing sunglasses.)732 Chapter 11 Electromagnetism

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