Light_1 (1)

Light_1 (1) - Light and Color What is light? Physics...

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Light and Color
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What is light? Physics answer: “light is an electromagnetic wave” Normal answer: “light is that thing that helps you see” QuickTimeª and a decompressor are needed to see this picture. QuickTimeª and a decompressor are needed to see this picture. Images from wikipedia article “Light”
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A spectrum of colors Empirical fact Red light has less energy (colder) Blue light has more energy (hotter) QuickTimeª and a decompressor are needed to see this picture.
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How do you make/absorb light? Physics answers: Shake a charged particle really fast Stick an electron in front of a light beam and then throw a bag over it Normal answers: turn on a switch Put something in front of it
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How do we see? “Light” hits your eyes, somehow generates a signal that gets sent to your brain QuickTimeª and a decompressor are needed to see this picture.
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The fundamental interaction QuickTimeª and a decompressor are needed to see this picture. QuickTimeª and a decompressor are needed to see this picture.
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Light_1 (1) - Light and Color What is light? Physics...

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