You are correct! When a pulse travels from a less dense medium to a more dense medium, the speed of the transmitted pulse will be slower than the incident pulse. Here's why:

Understanding the Relationship Between Density and Wave Speed

* Density: A denser medium has more particles packed together in the same space.

* Wave Speed: Wave speed depends on the properties of the medium. In general, waves travel faster through less dense mediums.

What Happens at the Boundary?

1. Reflection: Some of the incident pulse energy will be reflected back into the less dense medium. This reflected pulse will travel at the same speed as the incident pulse.

2. Transmission: Some of the incident pulse energy will be transmitted into the denser medium. This transmitted pulse will travel slower than the incident pulse because the particles in the denser medium are closer together, hindering the wave's progress.

Analogy:

Imagine throwing a rope tied to a heavier rope. The wave you create in the lighter rope will travel faster than the wave that continues into the heavier rope.

Key Points:

* Refraction: The change in speed at the boundary will also cause the transmitted pulse to bend, or refract, as it enters the denser medium.

* Frequency: The frequency of the wave (how many cycles per second) will remain the same, even though the speed changes.

Let me know if you'd like me to elaborate on any of these concepts further!