Front

receiver

Back

device or apparatus that receives electrical signals, waves, or the like, and renders them perceptible to the senses

Front

detector

Back

device for detecting electric oscillations (movements back and forth) or waves

Front

collision

Back

when two things hit each other

Front

energy

Back

ability to do work; can be transformed from one form to another

Front

force

Back

push or pull

Front

vibration

Back

a repeated back-and-forth or up-and-down motion

Front

deform / deformation

Back

different types of shape changes an object can undergo

Front

loudness

Back

the perception of sound pressure, intensity and volume; depends on the amplitude of the sound wave involved

Front

reflect

Back

the return of light or sound waves from a surface

Front

laser

Back

device for Light Amplification by Stimulated Emission of Radiation