You can see that when light goes through water at an angle. That phenomenon is called refraction. Reflection When a wave runs into an object or a different material, much of the wave is reflected. For example, when light strikes a colored piece of glass, some of it is reflected, some of the light passes through the glass, and some of the light is absorbed in the colored material. Likewise, when sound strikes a wall, some of it is reflected as an echo, some of the sound is transmitted right through the wall, and some is absorbed in the wall material.
Some materials absorb better than others.
Sound absorbing materials will reflect very little sound and will transmit even less. Most of the sound energy is absorbed in the material. Likewise, some materials absorb light waves better than others. Dark materials that don't transmit light are the best for absorbing the light energy. When a wave meets an edge When a wave meets the edge of an object, you would think some would go straight ahead, while the blocked portion would be reflected or absorbed.