Waves close wavesVibrations that transfer energy from place to place without the transference of matter. , including sound and light, can be reflected at the boundary between two different materials.

Whether a sound wave is reflected, refracted, or absorbed depends on the densities of the materials either side of the boundary. If the densities are very different then reflection is more likely.

In addition to our other problems, we must also contend with transmission (with attenuation), reflection, refraction, diffraction, absorption, and scattering. In addition to our other problems, we ...