A night party was organized around a swimming pool. A professional installed a yellow light source suspended by a wire attached to a circular Styrofoam blade with radius R = 2.0m, so that no one at the party could see it. Source. The effect is that, whoever attended the party saw the pool water glistening yellow due to the diffusion of light by particles in the water, and by the reflection on the walls and the bottom. At what depth, approximately, should the light source be? *