Physics II For Dummies
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Light waves — that is, electromagnetic waves — behave like other waves: They can reflect, refract (bend), and interfere with each other. Here are some wave formulas that are useful when you’re working with optics. You can determine the wave frequency and period, predict how fast light travels in various materials, and determine how light will bend in lenses and bounce off mirrors.

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Steven Holzner, PhD, taught physics at Cornell University for more than a decade. He is the author of Physics For Dummies, Physics Workbook For Dummies, Quantum Physics For Dummies, and Quantum Physics Workbook For Dummies.

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