State the principle of superposition of waves.

Explanation

### Step-by-Step Solution:

1. **Understanding the Concept**: The principle of superposition of waves states that when two or more waves overlap in a medium, the resultant displacement of the medium at any point is the sum of the individual displacements caused by each wave.

2. **Defining the Waves**: Let’s denote the individual waves as \( y_1, y_2, \ldots, y_n \), where \( n \) is the number of waves traveling through the medium.

3. **Resultant Displacement**: The net displacement \( y_n \) at any point in the medium at a given time \( t \) is given by the algebraic sum of the displacements of the individual waves. This can be mathematically expressed as:
\[
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