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Students learn that sound and light are waves that have basic features in common with ocean waves.
Using a diagram of a moving wave, students learn the definitions of crest, trough, amplitude, and wavelength, and are challenged to use these terms to label the parts of the diagram and then the parts of a drawing of an ocean. A movie director's final take is dark and murky. The Sleuths are called in to find out what went wrong. They study lighting, weather, and equipment to solve this shadowy problem.