| Definition | Term |
|---|
| an observed change in the frequency of a wave when the source or observer is moving | |
| slow vibrations of frequencies lower than 20 Hz | |
| in optics, the process of separating a wave (such as white light) of different frequencies into its individual component waves (the different colors) | |
| point of lowest pressure in a longitudinal wave | |
| in physics, the time that it takes a complete cycle or wave oscillation to occur | |
| the bending of a wave front as the wave front passes between two substances in which the speed of the wave differs | |
| the combination of two or more waves that results in a single wave | |
| radio detection and ranging, a system that uses reflected radio waves to determine the velocity and location of objects | |
| a physical environment in which phenomena occur | |
| a pattern of vibration that simulates a wave that is standing still | |
| in optics, a system that consists of two or more plane surfaces of a transparent solid at an angle with each other | |
| a change in the direction of a wave when the wave finds an obstacle or an edge, such as an opening | |
| the maximum distance that the particles of a wave's medium vibrate from their rest positions | |
| a wave that requires a medium through which to travel | |
| a wave that consists of oscillating electric and magnetic fields, which radiate outward at the speed of light | |
| a superposition of two or more waves that produces an intensity equal to the sum of the intensities of the individual waves; also known as reinforcement | |
| a phenomenon that occurs when two objects naturally vibrate at the same frequency | |
| sound navigation and ranging, a system that uses acoustic signals and echoes to determine the location of objects or to communicate | |
| a line in space that matches the direction of the flow of radiant energy | |
| a longitudinal wave that is caused by vibrations and that travels through a material medium | |
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