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Electromagnetic waves - Harvard University

Chapter 8 Electromagnetic wavesDavid Morin, waves we ve dealt with so far in this book have been fairly easy to visualize. Wavesinvolving springs/masses, strings, and air molecules are things we can apply our intuition we ll now switch gears and talk about Electromagnetic waves . These are harder to geta handle on, for a number of reasons. First, the things that are oscillating are electric andmagnetic fields, which are much harder to see (which is an ironic statement, considering thatwe see with light, which is an Electromagnetic wave). Second, the fields can have componentsin various directions, and there can be relative phases between these components (this willbe important when we discuss polarization).

supports waves, and that these waves travel at the speed of light. This section serves as motivation for the fact that light is an electromagnetic wave. In Section 8.2 we show how the wave equation for electromagnetic waves follows from Maxwell’s equations. Maxwell’s

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