A pulse is a wave

Options

A. of high duration
B. of short duration
C. which travels in vacuum only
D. which travels in solids only

Explanation

**Step-by-Step Solution:**

1. **Understanding the Definition of a Pulse:**
A pulse is a single disturbance that travels through a medium. It is a short duration wave that results from a sudden change in the medium.

2. **Generating a Pulse:**
To visualize a pulse, imagine a stretched wire. If you hold one end of the wire, pull it slightly, and then release it, a pulse is generated. This pulse will then propagate along the wire.

3. **Characteristics of a Pulse:**
- **Duration:** A pulse is characterized by its short duration. It does not last long; it travels through the medium for a brief moment before dissipating.
- **Propagation:** The pulse travels through the medium (in this case, the wire) and can end at the other end or somewhere in the middle if the wire is long enough.

4. **Medium Requirement:**
Contrary to some misconceptions, a pulse does not require a medium to travel in a vacuum. However, in practical scenarios, it is often observed in solids, liquids, and gases.

5. **Conclusion:**
A pulse is a wave of short duration that propagates through a medium. It is important to note that it does not have a long duration and can travel through various mediums, including solids.