Suppose a water wave is moving radially outward on the surface of the water from a point source.How should the power in a small segment of the wave front depend on the radial distance from the source?

Question

Quizplus · Accepted Answer

The power in a small segment of the wave front decreases as 1/r because the energy is spread over a larger circumference as the wave moves outward, leading to a decrease in intensity proportional to the increase in radius.

Suppose a Water Wave Is Moving Radially Outward on the Surface