What is the main difference between a pulse and a continuous wave?

The correct answer accurately captures the fundamental characteristics that differentiate a pulse from a continuous wave. A pulse is defined as a single, localized disturbance that travels through a medium, causing a temporary change in the properties of that medium, such as displacement or pressure. In contrast, a continuous wave consists of a series of oscillations or disturbances that propagate over time, repeating the pattern of movement.

This distinction is crucial because it highlights that a pulse occurs at a specific moment and in a limited region, while a continuous wave represents an ongoing, repetitive motion that can travel indefinitely. Understanding this difference helps in analyzing various physical phenomena in wave mechanics, such as how energy is transmitted through different mediums and the behavior of waves in different situations.