Chapter 14, Problem 44PCE

You are heading toward an island in your speedboat when you see a friend standing on shore at the base of a cliff. You sound the boat’s horn to get your friend’s attention. Let the wavelength of the sound produced by the horn be λ₁, the wavelength as heard by your friend be λ₂, and the wavelength of the echo as heard on the boat be λ₃. Rank these wavelengths in order of increasing length. Indicate ties where appropriate.