Time reflections, or spatial reflections, occur when "electromagnetic radiation in the form of light or sound waves hit a mirror or wall, respectively," resulting in a reflection, like a mirror ...

Waves close wavesVibrations that transfer energy ... be reflected at the boundary between two different materials. The reflection of sound causes echoes. The law of reflection states that: angle ...

Sound waves can reflect off surfaces. We hear reflected sound waves as echoes. Hard, smooth surfaces are particularly good at reflecting sound. This is why empty rooms produce lots of echoes.

Ask one student to hold the free ... waves or vibrations interact with the rocks that make up the Earth. Introduce to your students the two simplest types of wave interactions with rocks ...