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This chapter begins the study of waves. Waves govern many of the phenomena we experience every day, such as sound and light. In this chapter we look at what these various wave phenomena have in common, their so-called "wavelike" nature. In the following two chapters we will look at sound and light separately.
For these chapters it will be important to have pen and paper ready to recopy diagrams and rework problems. But it is especially important to have ready a mental pad of paper. You need to visualize the to-and-fro motion of the medium, the shape of waves, and the bending and reflecting of waves. Only in this way will the few formulas and ideas become intuitive.

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