Answer
See answer.
Work Step by Step
See the diagram. Consider 2 rays, representing the lateral limits of the incoming light beam.
The incoming beam illuminates an area of the surface that is wider than the beam itself, because it is coming in at an angle. One side of the beam hits the water first, and the other side travels a longer distance in air before it strikes the water.
The rays each bend toward the normal by the same amount. The rays representing the lateral limits of the refracted beam are farther apart than they were before. This means the refracted beam is wider than the incident beam.
