Final answer:
The speed at which a specific point on a wave moves is called the wave velocity, which is also known as the propagation velocity or propagation speed, and represents the speed at which the disturbance propagates through the medium.
Step-by-step explanation:
The speed at which a specific point on a wave moves is called the wave velocity. This term describes the speed at which the disturbance moves through the medium, and is also referred to as the propagation velocity or propagation speed. Options such as dispersive wave propagation, phase velocity, and group velocity are related to waves but describe different concepts. The phase velocity refers to the speed at which a wave phase propagates, while the group velocity refers to the velocity at which the overall shape of the wave's amplitudes—known as the modulation or envelope—propagates through space.
Wave velocity can be mathematically expressed by the equation velocity = wavelength × frequency, where wavelength is the distance between adjacent identical parts of a wave, and frequency is the number of waves passing a point per unit time.